lysaghtarchitecturaldetailingmanualroofwallflashingv2june2013

7/27/2019 LysaghtArchitecturalDetailingManualRoofWallFlashingV2June2013

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1Lysaght arciecurl Deilin Mnul 2013

Architectural Detailing Manual

Architectural

Detailing Guide

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Copyright, disclaimer, and limitation o liability

Copyright

Coyright in this inormation including any designs, text,

data, grahics and images belong to BlueScoe Steel Ltd,

trading as BlueScoe Lysaght excet as noted.

Thanks are given to the Ne Zealand Metal Rooing

Manuacturers Inc. or ermission to reroduce text,

grahics and draings rom their coyright ublication

- NZ METAL ROOF AND wALL CLADDING CODE OF

pRACTICE (Version 3: 2012). All rights reserved.

Any use o this ublication including reroduction,

modiication, distribution or reublication, in hole or in

art*, in any orm or medium, ithout ritten ermission o

BlueScoe Lysaght is rohibited.

Disclaimer

while every eort has been made to ensure the accuracy

o this inormation, BlueScoe Lysaght cannot be held

resonsible or any errors or omissions, hether caused bynegligence or any other reason, excet as limited by la.

product seciications can change ithout notice, and

there is an alloable variance in roduct dimensions rom

dierent manuacturing lants. BlueScoe Lysaght has the

right to revise the contents o the inormation sulied to

you rom time to time ithout reerence to you.

All inormation is rovided as a guide only. Beore

alication in a articular situation, BlueScoe Lysaght

recommends that you receive qualiied exert advice

conirming the suitability o roduct(s) and inormation in

question or the alication roosed.

Limitation o liability

This ublication is intended to be an aid or roessional

builders and is not a substitute or roessional judgement.

Terms and conditions o sale are available at local

BlueScoe Lysaght sales oces.

Excet to the extent to hich liability may not laully be

excluded or limited, BlueScoe Steel Limited ill not be

under or incur any liability to you or any direct or indirect

loss or damage (including, ithout limitation, consequential

loss or damage such as loss o rot or anticiated rot,

loss o use, damage to goodill and loss due to delay)hoever caused (including, ithout limitation, breach o

contract, negligence and/or breach o statute), hich you

may suer or incur in connection ith this ublication.

The LYSAGHT range o roducts is made by BlueScoe

Steel Limited trading as BlueScoe Lysaght.

Coyright BlueScoe Steel Limited Aril 17, 2013

produced at BlueScoe Lysaght Research & Technology

* Excet or material taken rom NZ METAL ROOF AND

wALL CLADDING CODE OF pRACTICE (Version 3: 2012)

here the ermission o the Ne Zealand Metal Rooing

Manuacturers Inc. must be sought.

Table o Contents

1. Introduction and Scoe ........................................................ 3

2. Design preliminaries .............................................................. 4

2.1 product selection ..................................................... 4

2.2 The urose o lashing .......................................... 4

2.3 Materials and inishes ............................................. 5

2.4 Comatibility.............................................................. 5

2.5 Suort sacings ..................................................... 6

2.6 Maximum lengths o rooing .................................. 6

2.7 Lo roo itches ....................................................... 6

2.8 wind orces on roos ............................................... 6

2.9 Codes and erormance tests ............................... 6

2.10 Seciications - rooing roiles .......................... 7

2.11 Seciications - alling roiles .......................... 8

3. Roo lashings .......................................................................... 9

3.1 Design ........................................................................ 9

3.2 Roo lashings ......................................................... 10

3.3 Flashing las ........................................................... 11

3.4 Aron lashing ........................................................ 11

3.5 Longitudinal lashings ........................................... 11

3.6 Transverse lashings .............................................. 12

3.7 Using notching tools .............................................. 13

3.8 Flashing at change o itch .................................. 14

3.9 Caed bent roos.................................................. 14

3.10 Gutter aron .......................................................... 15

3.11 Tyes o enetration lashing design ............... 16

3.12 Flashing large roo enetrations ....................... 17

3.13 Flashing small roo enetrations ....................... 19

3.14 Exansion .............................................................. 20

3.15 Standard roo lashings....................................... 21

3.16 Non standard roo lashings, caings ............ 24

3.17 Box gutters ............................................................ 25

3.18 Barge gutters and caing ................................ 26

4. Tyical all lashings ........................................................... 27

4.1 Cladding orientation .............................................. 27

4.2 walling roile running horizontally .................... 27

4.3 Tyes o lashings ..................................................28

4.4 Otional all trims ................................................. 29

4.5 Mid-all connections ........................................... 30

4.6 Internal all connections ..................................... 30

4.7 External corner connections ................................31

4.8 Flashing or horizontal cladding .......................... 31

4.9 Flashing or horizontal corrugate cladding ....... 32

4.10 Flashings or vertical cladding .......................... 32

4.11 windo lashings or metal cladding ............... 33

4.12 windo lashing tyes ........................................ 33

4.13 Flush indo lashings ....................................... 34

4.14 Recessed indo lashings .............................. 36

4.15 Butt indo lashings ......................................... 37


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Correct detailing o LYSAGHT roo and all lashing has

more than cosmetic imortance - it is essential in ensuring

the et eather erormance o the cladding.

Correct lashing and detailing ill imrove the overall

aearance o the inished job.

The advice given in this manual is consistent ith the

requirements o the Building Code o Australia and is aimed

at ensuring that correct ractice is seciied into building

contruction.

In many instances, alternative methods are examined to

rovide a clear understanding o the imlications arising

rom these alteratives.

And inally, the examles shon are tyical o the ork

to be carried out and may not aly to seciic situations

or seciic LYSAGHT cladding roducts. In all cases, a

qualiied tradesman should be engaged to ensure the

advice given here is alicable to your intended use.we hoe that the inormation sulied rovides clear,

concise direction in the correct design and detailing o roo

and all lashing or architects and draghtsmen.

The manual is set out in to arts, design and lashing.

For overall roo and all design, reer to the LYSAGHT

Rooing & walling Installation Manual. I these roducts are

to be used in cyclonic areas as deined in AS 1170.2; 2011,

you must also reer to the LYSAGHT Cyclonic Area Design

Manual.

Both these ublications are availble at: .lysaght.com

1. Introduction and Scope


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2 Design preliminaries

2.1 Product selectionwhen you incororate steel cladding into your building

LYSAGHT oers a ide range o roiles rom hich to choose.

whilst rooing and alling obviously have to kee out the

eather, they also have signiicant eects on the looks, cost

and durability o a building.

I you are unsure about any roduct eature, visit

.lysaght.com, call our inormation line or seek advice rom

the relevant secialists.

BlueScoe Lysaght has been sulying the Australian building

industry ith remium roducts or over 150 years, and our

technical literature rovides the engineering data to design

buildings using our roducts.

In articular, architects and builders should consult chaters

2 to 6 o the LYSAGHT Rooing & walling Installation Manual.

we urge the reader to consult this document or overall designand ixing advice, although selected arts o that inormation

are reeated here.

The aroriate design ill deend on your articular needs

and circumstances. You should get advice rom the relevant

qualiied secialists here required.

2.2 Purpose o lashingThe urose o a lashing is to divert ater aay rom any

oint o entry, and to make any building eatherroo.

Flashings and caings are stris o metal ormed to

eatherroo the edges o rooing and alling.

For the uroses o this chater, only the term lashing is used.

The olloing sections should be considered as a guide only.For a comrehensive account o lashing guidelines, reer to

HB39-1997.

Similar methods o lashing are used or dierent cladding-

roiles. You can adat the rinciles to suit your alication.

In all cases it is imortant to have amle cover rovided by the

lashing and roer turn-u o the cladding underneath.

Be careul hen moving beteen suorts. Do not alk in the

an immediately adjacent to lashings or translucent sheeting.

walk at least one an aay.

Lysaght has a range o standard lashings. we can also sulycustom lashings to your requirements ask your local service

centre or details.

Flashings are not only required to rovide eather-resistance

the many junctions on a roo or all structure, but are also

a very visible art o the roo and all cladding design, and

erorm an imortant role in the aesthetic aearance o the

building.

Exerience is required to design, cut and asten lashings that

ill last the lietime o the roo or all cladding, and secialist

assistance should be sought here this exerience is not

available.

All lashings must be designed to revent onding o ater

or build-u o debris. Flashings must be designed to rovide

eather-resistance or the roo or all cladding ithout

reliance on sealant as the rime means o roviding eather-

resistance.

Unainted galvanised steel is incomatible ith most inert

materials and is subject to inert catchment corrosion.


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2.4 Compatibilitywhen to dissimilar metals are in contact and moisture is

resent, one metal is relatively rotected hile the other

suers accelerated corrosion. Galvanic or bimetallic corrosion

can also occur hen ater los over dissimilar metals.

The design o lashings has a direct relationshi to corrosion,

as the underlying design rincile is to kee the metal dry, toavoid any retention o moisture by debris, and to rovide all

lashings ith a minimum all o 11 or 12 to avoid onding.

The designer and rooing contractor should be aare o

comatibility issues hen combining materials in a roo

system or lacing assemblies such as air-conditioning units,

solar collectors and alkays on to o roo cladding. I

materials are combined incorrectly, severe localised corrosion

may occur.

It is very imortant that lashings be made rom materials

that are comatible ith the cladding (Section 2.10, LYSAGHT

Rooing & walling Installation Manual).

Lead lashing is not recommended, hoever it ill usually be

retained hen re-rooing, because it is usually cemented into

the structure. In these cases:

thetopsurfaceoftheleadflashingmustbepainted

ith a good quality exterior aint system (to limit

contamination ith lead comounds in ater running

o the lashing); and

theremustbeabarrierbetweentheleadflashingand

the cladding: either a lastic stri (such as olythene

damcourse), or aint.

Flashings should conorm to AS/NZS 2179.1:1994, and be

comatible ith the cladding (Section 2.10, LYSAGHT Rooing

& walling Installation Manual).

Materials or lashings are available in ZINCALUMEor

COLORBONDinishes.

2.3 Materials and inishesTo ensure equal durability, lashings, ridge caings, and

accessories should be manuactured rom the same material,

and have the same coating system, as the material used or

the roo and all cladding. when this is not ossible, or i

dierent materials are intended or seciied, the alternative

materials should be comatible or both contact and run-

o. Our most idely used cladding roiles are listed inTables 2.10.1 and 2.11.1. They are available in COLORBOND

reainted steel, or in unainted ZINCALUME aluminium/zinc

alloy-coated steel.

COLORBONDre-ainted steel has either a aluminium/

zinc alloy-coated steel or stainless steel base metal, ith a

range o organic coatings to coe ith exosure to a range o

environments.

COLORBONDis reainted steel or exterior rooing and

alling. It is the most idely used.

COLORBONDMETALLICis reainted steel or suerioraesthetic qualities dislaying a metallic sheen.

COLORBONDULTRAis reainted steel or severe coastal

or industrial environments (generally ithin about 100 to

200 metres o the source).

COLORBONDSTAINLESSis reainted stainless steel or

very severe coastal or industrial environments (generally

ithin about 100 metres o the source). It is subject to

availability and long lead times.

Check ith your local BlueScoe Lysaght oice or availability

o roiles, materials, inishes, colours, accessories; and orsuitability o the roduct.

Tables 2.10.1 and 2.11.1 list general inormation or roile

selection. Reer to our ublications on seciic roducts

or detailed seciications. There are also ublications on

ZINCALUMEsteel and COLORBONDreainted steel rom

our inormation line (page 1).

Typical material speciications

ZINCALUMEaluminium/zinc alloy-coated steel comlying

ith AS 1397:2011. Minimum yield strengths are 550Mpa

(G550), or 300Mpa (G300) deending on roile. Minimumcoating mass is AZ150 (150g/m2 )

COLORBOND is a re-ainted steel. The ainting comlies

ith AS/NZS 2728 and the steel base is an aluminium/zinc

alloy-coated steel comlying ith AS 1397:2011. Minimum

yield strengths are 550Mpa (G550), or 300Mpa (G300)

deending on roile.Minimum coating mass is AZ150

(150g/m2)

COLORBOND Ultra is a re-ainted steel. The ainting

comlies ith AS/NZS 2728 and the steel base is an

aluminium/zinc alloy-coated steel comlying ith AS

1397:2011. Minimum yield strengths are 550Mpa (G550),

or 300Mpa (G300) deending on roile. Minimum coating

mass is AZ200 (200g/m2)


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2.7 Low roo pitchesUnless there is adequate ositive all in a roo, there is

danger o onding, hich can lead to a reduced service lie,

articularly in coastal areas.

At lo sloes, say around 1 in 50 (1) sloe, all roo suorts

must be in the one lane because slight variations can result

in zero or negative all. This may occur even ater comletion

o the building as the result o settlement, timber aring or

shrinking, or extra loadings (like air conditioners).

Minimum recommended roo sloes are listed in Table 2.12.1

o the LYSAGHT Rooing and walling Installation Manual. As

a guide, herever ossible, you should design or a minimum

sloe o 1 in 30 (2). Roo sloes loer than the recommended

minimum may be available subject to enquiry and ill be

deendent uon the roo alication and building details.

2.8 Wind orces on roos

winds create considerable orces on both the toside andthe underside o roo cladding, and you must consider these

orces in the design and ixing o any roo. The orces are:

inward orcestending to collase the roo cladding

inards, caused by ind acting directly on the indard

side; and

outward orcestending to lit the roo cladding rom its

raming, and the entire roo structure rom the rest o the

building. Outard orces can be caused both by ulit

rom negative ind ressures, outside the building; and by

ositive ind ressure inside the building.

Generally the greatest ind orces imosed on roos are due

to the outard orces. Because the dead eight o rooing

materials is relatively small, the outard orces must be

resisted by the roo asteners.

It is very imortant that the battens and roo raming are

adequately ixed to the raters and alls, and that claddings

and lashings also be ixed to ithstand these ressures.

2.9 Codes and perormance tests

AS 1562.1:1992 seciies the design and installation o sheet

metal roo and all cladding. Our rooing roiles satisy all the

requirements o this standard, including the ability o the roo

to resist outard orces and concentrated loads. The testing

is erormed according to AS 4040.1:1992 and AS 4040.2:1992.

Flashings and caings, although not tested searately, must

comly to the ixing requirements o the cladding to deliver

equal erormance.

2.5 Support spacingsThe maximum recommended suort sacings are shon in

Tables 2.13.1 and 2.14.1 o the LYSAGHT Rooing and walling

Installation Manual. They are based on data in accordance ith

AS 1562.1:1992 Design and installation o sheet roo and all

cladding: Metal, and AS 4040.1:1992 Methods o testing sheet

roo and all claddingResistance to concentrated loads.

The sacings in the tables are recommended to roduce

adequate erormance o claddings under concentrated loading

(incidental or maintenance).

For suort sacings in ind conditions, reer to our

ublications on seciic roducts or ind ressure data.

In all cases, cladding is ixed to a suort o 1.0mm minimum

base metal thickness (BMT) and minimum yield stress o

550Mpa. I you ant to use metal battens thinner than 1.0mm,

seek advice rom our inormation line.

2.6 Maximum lengths o rooingThe valleys (or ans) o rooing have to carry ater to the

gutters. I the valleys overill in heavy rain, ater can lo into

the roo through the side-las and lashings.

Factors aecting aterroo and drainage caacity o the las

o a roile include:

thewidthanddepthofthevalleysorpans;

thepitchoftheroofrainflowsfasteronasteeper

itch;

rainfallintensityforthegeographicalarea;

thelengthoftherooffromridgetogutter;and

penetrationsthatcausenearbyvalleystocarryextra

rain diverted rom valleys obstructed by the enetration

(Figure 2.14.1).

The maximum recommended roo lengths or drainage or each

roile are given in Table 2.14.1 o the LYSAGHT Rooing and

walling Installation Manual.


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Table 2.10.1Seciications o rooing & alling roiles

2.10 Speciications - rooing

FLATDEK II5

FLATDEK5

CUSTOM ORB4

CUSTOM BLUE ORB4

Eaves Overhang3

6.60.60

1650 1750 2200 150 450 2600 3200 3850 150

2050 2350 2800 200 500 3000 3450 3900 200

2350 3000 3600 250 550 3300 3600 3900 250

1500 1800 2100 200 600

2 See Section 2.15 of the LYSAGHT Roofing & Walling Installation manual.

5 FLATDEK & FLATDEK II are Home Improvement profiles. Please refer to the brochures for more installation details.

- 1800 2200 200 500 - 2150 3250 300

- 2100 3050 250 600 - 2500 3550 400

of the LYSAGHT Roofing & Walling Installation manual for explanation of stiffened.

KLIP-LOK 406

KLIP-LOK CLASSIC 700

KLIP-LOK 700 HI-STRENGTH

SPANDEK6

TRIMDEK

LONGLINE 305 (not tapered)

SPANRIB


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Table 2.11.1Seciications o roiles or alling only

Roofing & Walling profiles

Step

ES

IS

ES Single span

Spacing definitionsES = End spanIS = Internal span

O = Overhang

IS

O

O

walling roiles only

0.42 4.1 272 260 12 - 1000 1000WALLCLAD

WEATHERBOARD

TRIMWALL

EASY-CLAD

PANELRIB6

MINI ORB7

MULTICLAD

Overhang

mm

n/a

2.11 Speciications - walling


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3. Roo Flashing

3.1 DesignAll roo cladding edges located other than at the gutter, must

have a cover lashing astened on both aces.

Flashings at the erihery o roo or all cladding are subject

to high suction or negative ind loads that oten exceed all

other ositive imosed loads. As a result the ind design load

can be u to tice that o the main roo area and extra ixings

are required to ix lashings.

The design ind load seciic to any articular building, ill

determine the number and the sacing o lashing asteners.

There is hoever a minimum number o astenings that should

be rovided to avoid lexing, oil canning or atigue cracking

o metal cladding under luctuating loads and also to revent

noise or lutter.

Scres are reerred to rivets or astening lashings because

the larger diameter shank gives a greater shear caacity, andas they have a bigger head a asher can be used to increase

the ull over resistance er astener.

The ingress o rain into the roo or all cavity via the lashings

is redominantly caused by the ressure dierential beteen

the outside air and that inside the roo or all cavity.

This ressure dierential caused by ind gusting is a dynamic

one and luctuates greatly, hich means that a cyclic or

uming action can occur hen ater is sucked into the joint

or cavity that a lashing is covering.

An anti-caillary oset old, a clearance ga o u to 5mm ora sealant should be rovided on all lashing edges to avoid

caillary action here lashings are in close contact ith the

roo or all cladding.

Flashings, other than standard ridging, are roduced to

seciic order and are designed and manuactured rom

lat sheet or coil. I these lashings are required to match

the colour o the roiled cladding sheets it is necessary or

the re-ainted lat sheet or coil to be made by the samemanuacturer using the same rocess in order to avoid

dierential colour matching or ading.

preerred maximum length o lashing is 6m, ith exansion

joints rovided ater a maximum o to lengths o lashing

(12m) have been ixed together, as any la secured by rivets or

scres eectively becomes one length.

Flashings are restricted in length in the same manner as are

roo and all cladding sheets and are subject to the same

requirements and exansion rovisions.

The edges o all lashings must be saced at a minimumdistance o 2mm - 5mm aay rom an adjacent horizontal

surace to avoid moisture retention and deterioration at the

cut edge o coated steel lashings. This clearance alies

articularly hen a cut edge is very close to concrete or

laster or butyl rubber.

The end o all cladding should not extend don to any aron

lashing, but should have minimum clearance (CL) o 25mm and

a maximum clearance o 50mm.

c c

c

c

CL

CLCL

CL

Smooth

Smooth

cladding Profiledcladding

Profiled

Figure 3.3.1Barge

Figure 3.3.2Vertical aron

Figure 3.3.3paraet

C = Minimum cover

Cl = Clearance


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Figure 3.2.3Chased aron

Figure 3.2.6Vertical cladding

Figure 3.2.4Angle diverter

Figure 3.2.7Angled aron 110

Figure 3.2.5Angled aron 45

Figure 3.2.8To iece aron

Chased aron

Vertical cladding

Angle diverter

Angled aron 110

Angled aron 45

To iece aron

Sto endturned don

Diverter

Sto endturned don

Sto endturned don

Sto endturned don

3.2 Roo lashings


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Figure 3.5.1Tyical longitudinal lashings

pierce ixed roo sheet 150mm min.

Concealed ixed roo sheet Into ull an

(2/3 an covered)

3.3 Flashing lapsA la is that art o a lashing that overlas or covers any

ortion o the same shaed comonent, and is variously

described as an end la, overla or underla.

Las should comly ith the olloing criteria:

anoverlapmustruninthesamedirectionasthewateri.e.

donhill;anoverlapmustrunovernotunder;

anoverlapmustbeacrossthefalloratashallowangle;

watermustflowoveralapnotintoit;

alapmustbeself-drainingandnotrelysolelyonsealant;

alapmustbemechanicallyfixed;

asealedlapmusthaveaminimumofwidthof25mm;

3.4 Apron FlashingCladding should not it tightly don onto the horizontal surace

o any aron lashing as it ill retain moisture and collect dirtand debris and should have minimum clearance o 25mm.

3.5 Longitudinal lashingsLongitudinal lashings run arallel to the ans or valleys, and

are made to suit the cladding roile (Figure 11.2.1). They

should have an edge turned-don to di into the an or valley.

Flashing Cover

The minimum recommended cover o longitudinal lashings

over cladding should be as ollos: (as taken rom HB39-1997)


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Figure 3.6.1Tyical transverse lashings

3.6 Transverse lashingsTransverse lashings run across the ans or valleys (Figure

3.6.1). They usually have a stiening li, along the loer edge,

hich is turned-don to di into the an or valley. To maximise

eatherrooing, the bent li is roiled to it.

The turn-don or transverse lashings or CUSTOM ORB

and CUSTOM BLUE ORB can be ashioned to it the roile

by either notching or scribing to match the corrugations, or

lightly dressed into the valleys. The tye o ashioning (i any)

deends uon roile shae and the tye o material used to

lash. Fashioning is reerred or lo-sloe roos.

The turn-don or transverse lashings or ide anned

cladding is alays notched or scribed to it over the ribs.

Flashing Cover

BlueScoe Lysaght roduces a range o standard lashings

(hi, barge, aron). To increase eather-resistance, Lysaght

recommends you maximise the overla beteen lashings and

claddings. Reer to Table 8.1.2 in HB-39 or greater detail.

Fixing o Flashings

Longitudinal lashings shall be astened at maximum 500mm

centres. Transverse lashings shall be astened in accordance

ith HB39-1997, as detailed belo.

Notching tools

Hand-oerated notching tools cut one notch at a time. Each

tool matches only one cladding roile. There are to tyes

o tool; their use deends on hether or not the edge o the

lashing has irst been bent don.

Table 3.6.1Notching tools

Every 4th rib (minimum)

Every 3rd rib(minimum)

Every rib

KLIP-LOK 406

KLIP-LOK 700 HI-STRENGTH

KLIP-LOK CLASSIC 700

SPANDEK, TRIMDEK

Others subject to inquiry.

Proile Recommended Fixing Spacing (min.)

CUSTOM ORB/CUSTOM BLUE ORB Every 4th rib

SpANRIB Every rib

KLIp-LOK 406 Every rib

KLIp-LOK 700 HIGH STRENGTH Every rib

KLIp-LOK CLASSIC 700 Every ribLONGLINE 305 Every rib

SpANDEK Every 3rd rib

TRIMDEK Every rib

The above astener sacing relates to the stitching o lashings to

sheeting. It does not constitute the minimum number o asteners

required to ix the sheeting to urlins.

Flashings rovide the essential eatherrooing at the

edges, and they sharen the image o the inished job.


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Figure 3.7.1Using notching tools

3.7 Using notching toolsAter the cladding is ixed and the turn-us inished, roceed

as ollos.

Placeaflashingwiththenotch-edgerestingontheribs.

Locateyournotchingtooloveraribwiththenotchinghead

against the lashing.

verticaltool: The body locates along the rib.

horizontaltool: the lugs on the underside locates on to

o the rib.

Raisethehandletoopenthetooland:

verticaltool: lit the lashing into the mouth o the tool;

horizontaltool: slide the mouth o the tool over the edge

o the lashing as ar as it ill go.

Pushdownonthehandletoperformthenotching.

Repeatforallribs,checkingineachcasethattheflashing

is correctly ositioned.

Ifyouareusingahorizontaltool,benddownthetongues

beteen the notches over a suitable straight edge (such as

a iece o timber).

Notching with tinsnips

I notching tools are not available, lashings can be notched

to the rib roile ith tinsnis (Figure 3.7.2). The rocedure is

sometimes knon as scribing. Ater the cladding is ixed and

the turn-us inished, roceed as ollos.

Placetheflashingwiththeturned-downedgeresting

on the ribs. Markoutthenotchingusingatemplatepositionedover

each rib.

Cutthenotcheswithtinsnips.

This rocedure is also used or hi caings.

Fasteners or transverse lashings

You must roerly ix both lashings and the ends o all sheets.

where the cladding is ierce-ixed through crests, and the

osition o the urlin allos it, the asteners used to ix the

sheets, may also ix the lashings.

On all other installations, ierce-ix your lashing to the ribs or

crests o the sheets.

Joining lashings

The overlas o transverse lashings should be sealed ith a

recommended sealant and astened. Beore inally ositioning

and ixing the la, turn over the to iece and aly a 3mm

bead o sealant across the lashing, about 12mm rom the end.

Figure 3.7.2Using a temlate to mark out or notching ithtinsnis


14/40


3.8 Flashing at change o pitch

Figure 3.8.1Tyical lashing at changes o itch

3.9 Capped bent ribbed roosTray cladding can be used in continuous lengths rom eave to

eave by cutting the ribs and bending the ans at the ridgeline.

The same rocess is used on Mansard roos. Cas are itted

over the cut ribs, hich oen u hen the ans are bent.

Fitting the rib cas can be time-consuming and care must be

taken ith sealing to avoid any ossibility o leakage.

The ribs must be cut squarely, ith a metal cutting blade in a

oer sa, set to the deth o the rib minus 2mm.

In some states ressed steel cas may be available to suit

KLIp-LOK ribs, though the range o angles is limited. Cas can

be handmade to suit any angle rom lat sheet.

KLIp-LOKis most requently used or caed bent ribbed roos,

but LONGLINE 305, TRIMDEK or even SpANDEK can be used.

For these our roiles the rib cas can be made rom ieces

o rib roile cut rom a short length o cladding. A neutral-cure

silicon sealant should be used.

and on flanges.Figure 3.9.1Caed bent ribbed roo


15/40


3.10 Gutter apronwhere the ends o roo cladding are exosed to contaminants

such as sea salt or industrial ollutants it is better ractice to

rovide an over lashing hich discharges into the gutter or

souting or the olloing reasons. (see Figure 3.10.1 & 3.10.2)

Itprovidesameasureofprotectiontotheundersideofthe

roo cladding and the underlay.

Itprovidessupportfortheroofingunderlaywhichissubject

to damage rom ind and UV.

WherePVCspoutingisused,thereisanairgapbetween

the souting and the ascia because o the thickness

o the brackets. In coastal locations here the ends o

roo cladding are exosed this unashed area becomes

suscetible to corrosion and a gutter aron can minimise this

risk.

Ifthereisnospoutingorithasalowfront.

Itprovidesprotectionagainstwind-borneembers.

Wheretheendsofroofcladdingareexposedinasevere

environment, contaminants can be driven u the ribs o the

cladding. Metal scriber lashings or iller blocks can be used

to revent or inhibit ventilation.

The over-lashing should extend 50mm into the gutter and the

underlay inishes on the don-sloe o the lashing. I there is

no over-lashing to the gutter the underlay should be extended

into the gutter by a minimum o 20mm..

Figure 3.10.1Gutter aron: Quad

Figure 3.10.2Gutter aron: TRIMLINE/SHEERLINE


16/40


3.11 Types o penetration lashing design

penetration lashings can be divided into our dierent tyes.

Type A

Underlashings are those that drain at the lane o the roo

an.

Soaker (under) lashingsSuitableforallpitches;

Thepreferreddetail;

Makethesidecurbinlinewiththerib;

Leaveminimumallaroundclearanceof10mm;

Allupstandsminimumof100mm;

Drillforrivetsbeforesealing;

Sealedlapsmustbeminimum25mm;

Ordercladdingsheetslongerforlapping;

Type B

Overlashings are those that drain at the lane o the rib o the

roo.

These are also knon as watershed or back lashings.

watershed lashings (over or back)

Simple

Recommendedtofirstpurlinfromtheridgeif>300mmwide.

Notsuitableifover1.100mwide

Notuniversallyacceptedaesthetically

Canbeusedinconjunctionwithsprungorover-roofdesign.

Type C

Taered lashings that drain at the lane o the roo an at the

to, and

over the ribs at the bottom.

These are also knon as under/over or transition lashings.

Taered or transition lashings

Providesgreaterrun-offcapacity

Suitableforallroofs>5.

Usedforaretrofit

Requiressupport.

Type D

Soaker lashings that drain at the lane o the roo an at the

gutter

Simple

Providesgreaterrun-offcapacity

Suitableforallroofs>5

Usedforaretrofit

Requiressupport

Limitedto1.1mwideand2.4mlong

Type A Under soaker

Type C Under/over tapered

Type B Over watershed


17/40


Figure 3.12.1Flashing method 1: Head gutter

Figure 3.12.2

Flashing method 2: Flat tray and sleeve

3.12 Flashing large roo penetrationspenetrations through ribbed cladding block the valleys (or

ans), and thus aect the ree lo o rainater don a roo.

All lashings have to eatherroo the cladding but on the

uhill side o large enetrations, they also have to channel

rainater sideays into valleys that run unobstructed to the

eaves.

Four methods are described here. In all methods the ends o

cut ribs may be closed o ith cas on the outside o the rib,

or ith lugs inside the ribs. plugs must be used on side-las

to allo the anti-caillary cavity to drain.

Note: For masonry construction, Building Code Australia

(BCA) requires the use o Damp Proo Course (DPC) to ensure

weather-proofng. For acceptable methods see BCA section

on weather-proofng masonry.

Support raming

wherever one or more o the sheet ribs are cut, you must

rovide raming to suort the cut ends o the roo claddingeach side o the enetration.

Existing lashing

I you have to re-use lead lashings that are built into the

structure, secial rotection is needed.

Method 1: Head gutter and apron lashings

This is oten the simlest method, and commonly used or

existing rotrusions (Figure 3.12.1).

Method 2: Flat tray and sleeve

To avoid itting and sealing end cas to all the sheet ribs on the

lo side o the enetration, an aron lashing can be itted tothe sleeve and sealed to the tray each side.


18/40


Method 3: Tray gutter or steeper roos

I the roo itch is more than, say 1 in 12 (5), you cut the roo cladding

suiciently high above the enetration to allo a tray gutter to raise

rainater over the to o the sheet ribs and divert it around the

enetration (Figure 3.12.3).

Method 4: Penetration close to ridge capping

I a roo enetration is close to a ridge caing (or lashing above the

enetration), you can it a simle lat tray, on to o the rooing, so that itextends rom under the caing don to a sleeve around the enetration.

Figure 3.12.4

Flashing method 4:penetrations close to ridge caing

Figure 3.12.3Flashing method 3:Tray gutter or steeer roos


19/40


Figure 3.13.2Small enetration ith sleeve

(Dektite sleeve illustrated)

Figure 3.13.1Small enetration ith metal skirt and sleeve

3.13 Flashing small roo penetrationsA langed cylindrical sleeve is a airly simle method o

lashing around small enetrations (such as ie enetrations)

hich it beteen the ribs o a roo sheet, or enetrate only a

single rib.

To methods are described here. wherever rooing is cut, you

must consider roviding extra suort or the rooing aboveand belo the enetration. where one or more o the sheet

ribs are cut, you must rovide raming to suort at the cut

ends o the roo cladding each side o the enetration.

Method 1: Tapered metal skirt and sleeve

This method uses arts custom-abricated rom metal. There

is no ositive seal beteen inside the building and the outside

atmoshere (Figure 3.13.1).

Method 2: Sleeve

This is oten the simlest method (Figure 3.13.2). Flexible

langed sleeves can be bought or lashing around

enetrations o at least 350mm diameter. They overcome the

roblem o caing and sealing the oen ends o cut ribs. A

sleeve is commonly used, though silicone sealant has a ider

oerating temerature range and is available in a ider range

o colours.

The lange around the base o the sleeve can be contoured by

hand to match the cladding roile beore it is sealed and ixed

to the cladding.

Be careul not to dam any valleys or ans so that rainater

can drain reely rom the high side o the roo enetration.

Moisture held in such areas can cause deterioration o the

sheet coating, reduced lie exectancy or oor aearance.

where damming o any valley or tray is unavoidable, due to

the size o the ie enetration, treat the installation as a large

enetration.

Copper penetrations

All coer ie enetrations through ZINCALUME orCOLORBOND steel cladding must be hysically and

electrically isolated rom the cladding. This can be done by

using a sleeve o pVC olythene or similar lastic that is also

ultra-violet stable.


20/40


Table 3.14.2Maximum distance beteen to & bottom roso asteners on a sheet, beore exansion joint is

needed

Table 3.14.1Thermal exansion and contraction o steelcladding

3.14 ExpansionBackground on thermal expansion

All metals exand and contract ith changes in temerature.

Although steel is by ar the least aected o all the metals

commonly used or roo and all cladding, the changes in

length exerienced in very long runs o rooing are signiicant.

On a clear hot summer day, ith no ind, the steel

temerature in roo cladding can reach aroximately 50C

in COLORBOND SURFMIST, 60C in lain ZINCALUME and

more than 80C in COLORBOND NIGHT SKY.

Examles o the thermal changes in lengths o steel cladding

that ould result rom various temerature changes in the

steel are shon in Table 3.14.1.

The actual exansion or contraction beteen the end o a

sheet and the last suort ould only be a raction o the

igures shon because the movement in the length o ixed

cladding ould normally take lace rom the centre toards

each end o the sheet. The movement at each end is thus onlyhal the total exansion or contraction.

Transverse thermal exansion oses no roblems in ribbed

cladding because each rib absorbs some transverse

movement.

Expansion joints

Thermal exansion eects are mitigated by slight bending o

astener shanks, thermal movement o the building structure,

and slight lexing o the urlins (here they are not restrained

by cleats or bridging). Hoever, or very long runs o rooing,

you should include an exansion joint to overcome linear

thermal exansion.

Table 3.14.2 shos the maximum distance beteen the to

and bottom ros o asteners on a ierce-ixed sheet. For

LONGLINE in distances o greater than 35m, lease contact

your Service Centre or advice. I the total length o to sheets

ierce-ixed through the la, or a single sheet exceeds this

distance, then an exansion joint is needed. There should be

no more than one ierce-ixed end-la beteen exansion

joints.

An exansion joint involves overlaing the ends o the

uer sheets over the ends o the loer sheetsbut ith aclearance beteen them (about 15mm). A tyical overla is

250mm (this overla is not the same as the overhang in Table

3.7.1 hich does not aly to exansion joints). The clearance

is usually created by having all the urlins or the rooing on

the high side o the joint, higher than the rooing on the lo

side o the joint. An extra urlin is needed at the joint. A bale

lashing rovides eatherrooing. See Figure 3.14.1.

where there is a risk o high inds, or the ribs result in a large

oening, you may need rotection, such as extra lashing or

the inclusion o closed-cell oam inill stris.

250mm

minimumoverlap

Baffle flashing.Notch overribs & fasten tounderlappingsheet

25 mm min.

clearance

300mm

Trays turned up

Depth ofsheeting

plus15 mm

Added protectionif required

Sheetingturned down

/pans

Figure 3.14.1Exansion joint detail


21/40


3.15 Standard roo lashingsLYSAGHT Standard lashings by region

Although some lashings are common to all regions, the

climactic conditions can cause variations in the local roduct

requirements. please check ith your local BlueScoe Lysaght

sales reresentative or the roduct oer in your area.

Other lashings are available as secial orders.

70

200

10

20160

Ne South wales

Barge capping

CUSTOM ORB & BLUE ORB

TRIMDEK & SpANDEK

KLIpLOK

70

190

10

30120

70

180

10

40120

Barge roll

50dia.

2400 mm length only

Ridge capping*Nominate roof itch


TRIMDEK & SpANDEK

KLIpLOK


100 18020

160

100 17030

120

100 16040

120

10

230140

20

*Nominateangle

10

220

14030

10

210

deg

140 40

190

50 16020

2400 mm length only

Barge roll capping

Spear point

180180

30 30120

170170

30 30120

160160

40 40120

50

127

19300

127

19

Tile flashingCUSTOM ORB & BLUE ORB

TRIMDEK & SpANDEK

KLIpLOK & SpANRIB

2020

11801180

140210 210

145145

145

545

Valley flashingValley flashing

Ribbed valley

Structural valley

Valley suort

Barge gutter

deg

deg

120

120

120

120

120

120120

120

Apron flashingCUSTOM ORB & BLUE ORB

TRIMDEK & SpANDEK

KLIpLOK & SpANRIB

160

*

*

*

*

145

140

*

*

*

*


22/40


2525

120120

50

310


23/40


100

KLIP-LOK Barge

10

294

550 or 770mm wide

150

150

7010

10

SPANDEK & TRIMDEK

SPANDEK & TRIMDEK


24/40


3.16 Non standard roo lashings, cappings and gutters

A

B C

D

E

F

GHA

A

A

A

A

A

A

A

A

A

A

A

A

B

B

B

B

B

B

B

B

B

B

B

B

B

C

C

C

C

C

C

C

C

C

C

C

C

C

D

D

D

D

D

D

D

D

D

D

E

E

E

Profile typesType 1 (CF1)

Type 2 (CF2)

Type 3 (CF3)

Type 4 (CF4)

Type 5 (CF5)

Type 6 (CF11)

Type 7 (CF12)

Type 8 (CF13)

Type 9 (CF14)

Type 10 (CF15)

Type 11 (CF31)

Type 12 (CF32)

Type 13 (CF33)

Type 14 (CF35)

Order requirements

On a sketch sho

1. proile tye

2. Colour (or ZINCALUME

steel, or GALVABONDi

not COLORBOND steel)

3. Side on hich colour

is to be (use letters

shon belo)

4. Dimensions (use letters

shon belo)

5. Angles on all bends that

are not 90 degrees

6. Quantity and lengths

Preliminary

Check ith your local

BlueScoe Lysaght oice or:

1. Available girth range2. Available colours

3. proiles not shon

4. Maximum lengths

5. Lead times

6. Ho to handle

taered lashings

This age shos some non-standard roiles. please ask your local BlueScoe Lysaght oice or other otions.

egnarhtriG )mm(006001

057002

009003

0001004

0021005

(Up to 400mm girth)


25/40


Figure 3.17.1Box gutter

Box gutter

Box gutter

3.17 Box guttersLYSAGHT standard design

Box gutters are designed to suit large ater carrying caacity

requirements, usualy on commercial buildings.

In eect, a box gutter oerates like an oen drain. Designing

or a box gutter requires adequate suort or the gutter

be rovided, both at the sides and belo, to rovide or theanticiated eight o the ater collected.

As ith all gutters, adequate all must be rovided as ell as a

rainhead or other large caacity drainage system.


26/40


3.18 Barge Gutters and cappingsBarge gutters are designed to rovide an otion or the

rainater carrying caacity or the sides o buildings.

This detail is the most common ay to lash the side o a steel

clad roo.

100mm

Barge

Barge flashing

150mm

150mm

150mm

Flange to match

profile depth

2-piece seamed

barge capping

required for

curved roofs

Barge

Purlin

Barge flashing

Figure 3.18.1Barge gutters and caings


27/40


Figure 4.1.1Tyes o lashing las

4. Typical wall lashings

4.1 Cladding orientationCladding is usually installed ith the roile running vertically

or horizontally, though sheets have been laid diagonallythe

choice is aesthetic.

wind can drive rain hard against all lashings, so it is

imortant that you ay attention to the detailing o lashings

around indos, doors, re-entrant and external corners, to

ensure you get a atertight building. You also ant a neat

aearance.

we make all lashings or some all claddings (like

EASYCLAD and MINI ORB) hich are sometimes called trims.

where these are not suitable, custom-made lashings can be

easily roduced olloing the general rinciles described in

this section.

4.2 Walling proile running horizontally Itisusualtolaythefirstsheetatthebottomofawalland

ork uards toards the eaves. You ant the indo

and door lashings to it roerly into the valleys, so you

should locate the irst sheet relative to the heads and

sills o doors and indos. Thus, you irst have to decide

here the cladding ill eventually be located at the heads

o doorays and at the heads and sills o indos beore

you lace the irst sheet.

Wherepossible,selecttheverticalsizeofwindowssothat

the lashings at both heads and sills ill coincide neatly

ith the itch o your roile

Besurethatthecrestsoftheprofilealignwitheachother

on adjacent alls, either side o a cornerthis ensures

that horizontal lashings it roerly into all valleys.

Wherevalleyscreateavoidatflashings,useclosed-cell

oam lastic inill

Wherewind-drivenraincanbeexpected,turnbackthe

edges o lashing to restrict ater movement ast the

lashing.

Direction of water flow 150-200mm overlap

Continuous beads

of silicon

Continuous beads

of silicon

15mm

15mm

Straight overlap flashing Soaker (underlap) flashing

Openings

200/300

mm

Maximum as

recommended

for profile

Sheet Overhang Recommended Minimum Drainage

50mmm

inimum

25mm

(15mm min.)

Minimum fall

for drainage 5

Minimum fall

for drainage 5

Flashing is fixed using self drilling screws or rivets. Fixing as close as possibleto the edge reduces distortion. Wind exposed areas near the edge of the

building may require additional fixing.


28/40


10mm

minim

um

10mm

minim

um

10mm

minim

um

35typical

Drip Edge

10mm

minim

um

135typical

Edge Break Mountain Fold Turn Down

10

mm

minim

um

A small gapmay remain

after crushing.

Flatten

to suit depth of profile

Roof Underlap

Wall Side Underlap(Horizontal sheeting)

Wall Side Overlap(Horizontal sheeting)

Vertical Wall UnderlapVertical Wall Overlap Vertical Wall Overlap

Roof Overlap

100/150mm

100/150mm

100/150mm

150/25

0mm

150/25

0mm

50/100mm

Drip edge

50/100mm50/100mm

Figure 4.1.3Tyes o lashing las

Figure 4.1.1

Edge tyes

4.3 Types o lashings


29/40


CD 3 Fascia to Sot Section,

Use ith pANELRIB, MINI

ORB, EASYCLAD, MULTICLAD

CD 1 Trim Channel

Use ith MULTICLAD,

EASYCLAD

CD 4 Feature Section Sot

Use ith pANELRIB, MINI

ORB, EASYCLAD, MULTICLAD

CD 20 Butt Joint trim - To

Hat. Use ith pANELRIB,

MULTICLAD and MINI ORB.

CD 15 Tee Section. Use ith

pANELRIB, MULTICLAD EASY-

CLAD and MINI ORB.

CD 8 purlin hat Section

Use ith MULTICLAD, EASY-

CLAD

CD 6 Internal Corner. Use

ith pANELRIB, MULTICLAD

EASYCLAD and MINI ORB.

CD 21 Butt Joint Trim -

Overla.

Use ith MULTICLAD

CD 22 Edge Trim

Use ith MULTICLAD and

MINI ORB. (Enquiry only in S.A.)

CD 23 External Corner. Use



CD 24 Internal Corner. Use



EC 3 Fascia Caing. Use

ith pANELRIB, MULTICLAD,

TRIMwALL, EASYCLAD and

MINI ORB.

CD 39 Trim Channel

Use ith EASYCLAD.

CD 40

Starter Cli

Use ith EASYCLAD.

CD 30 Fascia Caing. Use

ith pANELRIB, MULTICLAD,

TRIMwALL, EASYCLAD and

MINI ORB.

CD 27 Fascia to Sot

Section. Use ith pANELRIB,

MULTICLAD, EASYCLAD and

MINI ORB.

4.4 Optional wall trimsAvailable in ZINCALUME steel or COLORBOND steel*

38

38

28

28

28

22

17 15

28

1833

20

2838

20

25

28

1028

25

25

2.5

48

15

15

16

19

46

27

38

38

25

15 15

20 20

i i

28

28

15

75

145

45

50

38

15

20

22

CD 5 External Corner. Use



Our range o all trims are available or the range o LYSAGHT

cladding roles to rovide an attractive comliment to alls,

ceilings or sots.

Some trims are used to start the installation o the alling

anels hilst others rovide the erect nishing touch.

Made rom COLORBOND or ZINCALUME steel*, they are an

attractive, long lasting addition to any alling installation.

Not all trims are available in all locations and some

dimensions may vary rom state to state - or local availability

o all trims, contact your local sales oce.*Other materials, such as stanless steel and COLORBOND Ultra are

available, subject to enquiry.


30/40


4.6 Internal wall connections

4.5 Mid wall connections

50mm

minimum

flange

50mm

minimum

30mm

min.

Depth to suit profile

Depth to

suit profile

Wallsupports

Continuoussilicon seal

Continuoussilicon seal

Sheet overlap

Verticalconnection

Cladding profile

Cladding profile

Flashing

Cladding profile

Claddingprofile

Cladding profile

Flashing

Flashing

Flashing

Notched to

suit profileFeathered edge

(165 typical)

Profiledepth

50mm(typical)

Profile depth+ 10-25mm

50mm(typical)

Internal Corner Trim


31/40


4.7 External corner connections

4.8 Flashing or horizontal cladding

To suitprofile

To suit

profile

To suit profile

50mm

typical

External Corner Trim

50mm

typical

50mm

typical

50mm

typical

To suitprofile

To suit

profile

50mm

typical

50mm

typical

3030

50

75

50

30

10

10

10

10

1010

10

75

50 (75 without hem)

25 subject tocorrugation

10

50

1010

10

Flush under jamb

Flush jamb

Flush head

Flush sill


32/40


Figure 4.10.1Flashings or vertical cladding

4.10 Flashings or vertical claddingThe lashing detailing or vertical cladding is similar to roo

cladding enetrations, as the ater rom the under has to

drain over at the indo or door head. The most satisactory

detail is to rovide a sheet la at the head lashing, hich

enables automatic eathering by roiling the vertical ustand

o the head lashing or by lattening the la.

This detail can be used or corrugated, ribbed and traezoidal

cladding. Do not sto end the lashing but turn it don as

draing 4.10.1 and 4.10.2

Figure 4.9.1Butt details

4.9 Flashing or horizontal corrugate claddingDesigners and contractors using horizontally ixed corrugate

sheets as a design eature on industrial develoments and

commercial buildings, as ell as in domestic situations should

recognise that a high standard o quality o detailing and

ixing o the cladding is required and that there are a number

o requirements hich dierentiate horizontal rom vertical

roiled cladding.

Because horizontal cladding emhasises the deects in the

line o the raming to a ar greater extent than does vertical

cladding, the lane o the suorts both horizontally and

vertically should be straight ithin a tolerance o 5mm in 10

metres, and there should be little or no tist beteen the

vertical and horizontal lanes o raming members.

The cladding contractor should insect and arove the

standard o raming beore the commencement o any cladding

installation.

Horizontal cladding should be ixed in the an as this rovidesa stronger, more economical and aesthetic astening than

crest or rib ixing. The number, sacing and the osition o

the asteners are determined by the ind design load or the

building.

A simle and aesthetically accetable butt detail to join

horizontal cladding is to rovide a vertical break at structural

steel rame centres by the use o a to hat or tee lashing

section, but it is necessary to establish the exact sheet length

required, and or these sheets to be cut accurately to ithin

1mm to rovide a neat joint.

when horizontal metal cladding is directly ixed to a lined and

insulated all, designers should be aare o the likelihood

o condensation and it is recommended that horizontal las

should be sealed ith la tae or sealant.

100mm crush and

old to be fattenedover a sacer bar


33/40


4.11 Window lashings or metal claddingproiled metal cladding has been used or many years as

both vertical and horizontal cladding, articularly on garages

and arm buildings here the aesthetic requirements and

eathering may not have been the rime consideration. As

most o these buildings are oen and unlined, the cavity isnaturally vented and minor ater ingress can be tolerated,

but i the building is lined then there should be no ingress o

moisture. For this reason or lined and insulated buildings in

higher risk areas cavity construction is required. Buildings are

considered to be higher risk hen they are situated in a very

high ind design load areas (


34/40


1

2

3

Figure 4.13.1 STAGE 1

1 Corrugate flattened

2 Underjamb folded out to suit profile

3 Closed cell filler block perforated for ventilation1

1

2

3

4

Figure 4.13.2 STAGE 21 All ends stopended

2 Underjamb folded out

3 Closed cell filler block adhered to profile with contact spray adhesive

4 25mm 12# fasteners hidden behind overjamb

4.13 Flush window lashingsThe height o the sill fashing may have to bealtered to suit the osition o the role.

Flush mounted indos or doors can have icture

rame fashings, hich means that the indorame is mounted externally to the cladding, orcan have timber acings, or a large number o

alternative designs.Both the fush and recess fashings have an under

jamb and a ront or ace jamb.

Trim sizes or aluminium indos are usually lus10mm on the jamb liner size, hoever in order

obtain a vertical ustand the trim size or fushfashing design requires lus 15mm vertically, toallo or a 10mm acker.


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1

2

Figure 4.13.3 FLUSH WINDOW HEAD FLASHING

1 10 angle minimum

2 Turn down end of extended head flashing

1

2

3

4

Figure 4.13.4 FLUSH WINDOW SILL FLASHING

1 Overjamb hemmed behind window

2 Underjamb hemmed on face and hooked above profile.NB depth of underjamb is 12mm greater than profile height

3 End of sill dog-eared and turned up 10mm to receive overjamb

4 Trim height increased 10mm to accommodate sill turn-up


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4.14 Recessed window lashingsA recessed indo fashing design is considered thebest otion or horizontal cladding but accurate fashing

measurement and installation are required to rovideeather-tightness.

N.B. For lined buildings a cavity is required orhorizontal metal cladding.

3030

3050

25

30

50

30

50

10

10

10

10

10

10

10

15

15

15

15

15

50 (75 without crush and fold)

Recessed under jamb

Recessed jamb

Recessed head

Recessed sill

1

2

RECESSED WINDOW

HEAD FLASHING

1 10 angle minimum

2 Turn down end ofextended headflashing

1

2

3

4

RECESSED WINDOW

SILL FLASHING

1 Overjamb hemmed behind window

2 Underjamb hemmed on face and hooked above profile.

Note: Depth of underjamb is 12mm greater than profile height

3 End of sill dog-eared and turned up 10mm minimum to receiveoverjamb

4 Trim height increased 10mm to accommodate sill turn-up.

Figure 4.14.1Recessed indo lashings (underlay is omitted or clarity)

Figure 4.14.2Recessed indo head (detail)

Figure 4.14.3Recessed indo sill (detail)


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1

4.15 Butt window lashings

Alternative details that allo the cladding toterminate u to a fashing ithout overfashing it,

require accurate tting in order to be eathertight.(see Figure 4.15.2). These details are knon asbutt fashings and can be used on fush or recess

designs, ith a one-iece jamb. They are only

suitable or areas ith lo or medium ind designloads or in rotected areas and require recisedesign, recision measurement and manuacture torovide a eather-tight solution.

Butt indo fashings also require accurateinstallation to rovide an aesthetically accetablesolution, they should allo or drainage o a large

catchment, they require extra timber or xing, andor these reasons they are not a reerred detail.

The total amount o ater draining rom the

catchment area above rom multi-storey constructioncan be considerable, and butt fashings should

disose o it as a enetration. The catchment iscalculated by multilying the idth o the indooening by hal the height.

10

10

10

10

10

10

15

15

15

15

25

25

25

50

50

50

50

25

subject tocorrugation

Butt jambButt sill

Butt head

50 (75 without crush and fold)

Figure 4.15.1Butt indo lashings (underlay is omitted or clarity)

Figure 4.15.2Butt indo head lashing Figure 4.15.3Butt indo sill lashing

10 angle minimum

1

2

3

4

5 BUTT SILL FLASHING

1 jamb overlaps sill

2 Jamb hemmed both sides

3 Extra timber required

4 Alternative soaker jamb taken to the ground

5 End of sill closed and scribed to profile


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1

4.16 Flashings or vertical cladding

windo and door fashings or vertical cladding are similarto those used or horizontal cladding hoever a cavity is not

required or vertical cladding.

The main dierence is that the module is running horizontallyand thereore some fexibility is required i the fashings are to

be equal on both sides. To rovide or this the trimming size o

the indo oening should be lus hal the module dimensionto allo adjustment or equalisation on both sides to occur.

Figure 4.16.1Head lashing or vertical oriented cladding

Figure 4.16.2Sill lashing or vertical oriented cladding (underlayis omitted or clarity)

1. Flatten corrugation la


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4.17 Alternative Flashing designs

There are other alternative design otions to those shon thatdesigners should consider or butt designs hich rovide aeather-roo indo fashing alternative. I the oening is

anelised the vertical jamb fashing can be extended rom so-t to the ground or single storey buildings or to a module breakin a multi-storey building as shon in draing 4.16.1.

This alternative rovides the oortunity to use the same oran alternative material at the head and sill areas and a to hatfashing is used to obtain a module break.

Figure 4.17.1Alternative lashing designs

Alternativematerial


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Fr chic quir c 1800 641 417,

email [email protected]

product Descritions

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and eights contained this catalogue, all technical literature and

ebsites containing inormation rom BlueScoe Lysaght are

aroximations only.

They are intended by BlueScoe Lysaght to be a general descrition

or inormation and identication uroses and do not create a sale by

descrition. BlueScoe Lysaght reserves the right at any time to:

(a) suly Goods ith such minor modications rom its draings

and secications as it sees t; and

(b) alter secications shon in its romotional literature to refect

changes made ater the date o such ublication.

Disclaimer, arranties and limitation o liabilityThis ublication is intended to be an aid or all trades and roessionals

involved ith seciying and installing LYSAGHT steel building roducts

and not to be a substitute or roessional judgement.

Terms and conditions o sale available at local BlueScoe Lysaght sales

oices.

Excet to the extent to hich liability may not laully be excluded or

limited, BlueScoe Steel Limited ill not be under or incur any liability to

you or any direct or indirect loss or damage (including, ithout limitation,

consequential loss or damage such as loss o roit or anticiated roit,

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ublication.

Coyright BlueScoe Steel Limited 13 June, 2013

lysaghtarchitecturaldetailingmanualroofwallflashingv2june2013

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