westmansteel.com

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Cambridge (ON) TF. (855) 620-2720 F. (855) 937-8329

Winnipeg \ Brandon (MB) TF. (800) 661.2823 F. (800) 661.9305

Swift Current \ Regina \ Saskatoon (SK) TF. (800) 667.7468 F. (306) 773.4551

Airdrie \ Edmonton (AB) TF. (800) 661.2826 F. (800) 661.1852

Langley (BC) TF. (888) 937.8626 F. (888) 880.1855

M E M B E R C O M P A N Y

®

Rev 01.21

SNAP–LOK ROOFING PANELInstal lat ion Guide

Rev 01.21

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Table of Contents

Description of Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Description of Installation Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Cutting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Receiving/Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Tools/Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Flashings and Trims . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Fastening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Wood Framed Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

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Description of Panel

The Snap-Lok roofing panel is a concealed fastener roof system that offers a clean, durable finish to any roof. It is available in two sizes, 12” and 16” inches, 26 and 24 gauge and 16 standard colours. Steel sheets are prepainted Galvalume or bare Galvalume and have the longest life of any roofing sheet available. The high-quality factory baked-on paint system carries a 40 year limited warranty .

4" | 101.60mm 4" | 101.60mm1" | 25.4mm

0.251"

12" | 304.80mm

6.38 mm

4" | 101.60mm 4" | 101.60mm 4" | 101.60mm0.251"

16" | 406.40mm

6.38 mm1" | 25.4mm

SNAP-LOK PANEL 12”

SNAP-LOK PANEL 16”

SNAP-LOK PANEL DETAILSNAP-LOK PANEL 12” WHISTLER GREEN

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Description of Installation ManualThis Snap-Lok Roofing Panel installation guide is intended for the homeowner, contractor and metal roof installer. Please read and understand the manual content before beginning your roof installation in order to ensure a trouble free installation and maintain applicable warranties. If you have any questions regarding the installation of your metal roof system, please contact Westman Steel.

Disclaimer

By using this Guide, you accept the risks and responsibilities for all losses, damages, costs and other consequences resulting directly or indirectly from using this Guide . These installation instructions are intended as guidelines only . Westman Steel assumes no responsibility for the performance or quality of the roof system installation, nor any personal injury or damage that might occur as a result of improper installation.

Westman Steel does not warrant any product or material as meeting the current building codes, laws or regulations of any particular jurisdiction or local municipality.

This manual contains suggestions and guidelines on how to install Westman Steel Snap-Lok roof panels and trim details . The contents of this manual include the guidelines that were in effect at the time this publication was originally printed. In an effort to keep pace with the ever-changing code environment, Westman Steel reserves the right to modify, without notice, any specifications and/or designs at any time without incurring any obligations. To insure you have the latest information available, please inquire or visit our web site. Application and design details are for illustrative purposes only and may not be appropriate for all environmental conditions and/or building designs. Projects should be engineered and installed to conform to applicable building codes, regulations, and accepted industry practices.

All dimensions should be verified by field measurements prior to ordering materials.

Rev 01.21

Oil canning is an aesthetic phenomenon inherent to light gauge cold formed sheet metal and is characterized by a distortion or waviness of flat surfaces of metal roofing and siding products. As oil canning is an aesthetic issue and does not affect product strength or performance, it is not a cause for rejection. There are several factors that influence this behavior, such as sheet metal thickness, dimensions, installation and system design among others . Oil canning can be minimized by considering these factors mentioned above . See Canadian Sheet Steel Building Institute (CSSBI) - Fact Sheet 13 .

Snap-Lok roof panels should be applied on a minimum roof pitch of 3:12 or greater. For roof pitch less than 3:12, please contact Westman Steel.

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Safety Considerations

Cutting

Receiving / Handling

Always wear proper personal safety equipment when working with metal roofing panels and trims. Westman Steel recommends eye protection, ear protection, gloves and fall protection when working with sheet metal roofing products. Check with local safety authorities for requirements regarding guards, fall protection and other safe working procedures .

Avoid working with metal panels on windy days.

Do not walk on the panels until they have been completely fastened to the substrate . Do not step on panel ribs . Always step on supports.

Metal surfaces can be extremely slippery when wet or covered with frost. Always ensure proper fall protection procedures and equipment are used. Avoid working on wet or snow covered roofs.

Wear soft rubber-soled shoes when walking on a metal roof to avoid damaging the finish.

Steel roofing panels may be cut with metal snips, power or hand shears or nibblers. Circular saws with metal cutting blades are acceptable. Do not use abrasive blades, as they can burn both the paint and zinc coating leading to premature wear at these areas .

When cutting panels, turn the panels painted face down and cut in a location away from other panels to avoid metal particles embedding in the painted face of nearby panels. Always remove metal particles from drilling or cutting immediately to avoid damaging the paint finish. Particles, if left on the panel surface can rust overnight.

Sheet metal edges are very sharp. Always wear eye protection and gloves when handling or cutting metal sheets. Do not stack cut panels .

Check the delivery of metal roof panels and accessories for quantities and/or damage immediately upon receipt . Note any damage or shortages at the time of delivery. All errors/omissions must be reported within 30 days.

Handle panel bundles and individual panels with care to avoid damage. Generally, Westman Steel recommends that supports are to be located at no more than 10 feet from each other to provide adequate support from buckling or bending .

Do not drag sheets on the ground or over each other . Obtain the help of others to transport longer individual panels .

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Handling

USE SPREADER BAR WITH CRANE

SPREAD FORKS EVENLY UNDER THE BUNDLE

CORRECT CABLE LIFT

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Storage

Upon receipt of your roofing panels, store them in a well ventilated, dry location. Rain or condensation can be drawn between the stacked sheets where it can cause premature failure of the protective coating . Do not store panels in contact with the ground. Ensure the panels are adequately supported and elevated off the ground, preferably with a slope to allow water to drain . Cover panels with a waterproof cover spaced off the panels to allow air movement . Store panels inside if possible .

RAISE ONE END TO DRAIN MOISTURE AND COVER WITH WATERPROOF TARP ALLOWING AIR TO CIRCULATE THROUGH THE BUNDLE.

Tools / Equipment Required

1 Metal shears, nibblers, power shears or circular saw with metal-cutting cutting blade. Note: Saw cut edges can be jagged, unsightly and tend to rust sooner than sheared edges. Hot metal filings are produced when saw cutting, which may embed in and damage the paint coating. Also, saw cutting burns the paint and galvanizing treatment, leading to the onset of edge rust.

2 Metal snips (left edge, right edge and centerline cutting snips).

3 Hem bending tool (see image)

4 Gloves and protective clothing

5 Safety goggles and ear plugs (Eye and ear protection)

6 Tape measure and chalk line

7 Rubber mallet

8 Screw gun or drill (adjustable clutch recommended) – see CSSBI Fact sheet 42 in for more informationon recommended types of screw guns .

9 1/4” and 5/16” sockets – must be lobular andreplaced after 10,000 to 15,000 fasteners

10 Drill bits, screw bits

11 Pop rivet gun

12 Caulking gun

13 Pencils and markers

14 Utility knife

15 Locking sheet metal pliers

16 Hammer staplers

HEM BENDING TOOL3

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Flashings and Trims

COLOUR

6” (152.4)

3/8” (9.53)

1 5/8” (41.3)

#608 EAVE

#605 SIDE WALL

#611 FASCIA

#609 EAVE FLASHING

#606 TRANSITION

#612 FASCIA

#135 PROW GABLE

#603 ENDWALL

#610 FASCIA

COLOUR

8 1/8” (206.6)

3/8” (9.53)

1 5/8” (41.3)

COLOUR

9 3/4” (247.7)

3/8” (9.53)

1 5/8” (41.3)

COLOUR2” (50.8)

1/2” (12.7)

2” (50.8)

COLOUR43/8” (111.13)

41/2” (114.3)

3/4” (19.1)

1/2” (12.7)

COLOUR

3/4” (19.1)

2 1/2” (63.5)

1” (25.4)7 3/4” (196.9)

1/2” (12.7)

3/4” (19.1)

1/2” (12.7)

COLOUR43/8” (111.1)

4” (101.6)1” (25.4)

1/2” (12.7)

1” (25.4)

7” (177.8)

6” (152.4)

1/2” (12.7)

COLOUR

COLOUR

1/2” (12.7)

41/8” (104.8)

51/2” (139.7)

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#934 CONCEALED EAVE STARTER

COLOUR

1/2” (12.7)

1 1/2” (38.1)

4 3/4” (38.1)

2” (50.8)3/4” (19.1)

#935 CONCEALED GABLE STARTER

COLOUR

1/2” (12.7)

1 1/2” (38.1)

4 3/4” (38.1)

2” (50.8)3/4” (19.1)

#426S GABLE TRIM

COLOUR

5/8” (15.9)

3/4” (19.1)

3 3/4” (95.3)

1 3/8” (34.9)

2 1/2” (63.5)

1/2” (12.7)3/4” (19.1)

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Flashings and Trims

#584 RIDGE / HIP CAP

#583 RIDGE

#841 OFFSET CLEAT

#931 CURB SIDE FLASHING

#578 RIDGE CAP

#588 W VALLEY

#864 HIGH SIDE PEAK CAP

#932 CURB BOTTOM FLASHING

#580 RIDGE CAP

#589 W VALLEY

#930 CURB TOP FLASHING

#933 CURB COUNTER FLASHING

COLOUR

1/2” (12.7)

4:12 PITCH

5 3/8” (136.5)

1/2” (12.7)

5 3/8” (136.5)

COLOUR

1/2” (12.7)

8 1/2” (215.9)

1/2” (12.7)

8 1/2” (215.9)

COLOUR

11/4” (31.75)3/4” (19.1)

NO HEM

41/2” (114.3)

1 1/2” (38.1)

1 1/2” (38.1)5/8” (15.9)

1/8” (3.2)

14” (355.6)

2 1/2” (63.5)COLOUR

COLOUR4” (101.6)

5” (127)7/8” (22.2)

1” (25.4)

1/2” (12.7)

4” (101.6)

5 1/2” (139.7)1/2” (12.7)

7/8” (22.2)

COLOURCOLOUR

1 1/2” (38.1)

3 1/2” (88.9)

3/4” (19.1)

1/2” (12.7)

1” (25.4)

COLOUR

12” (304.8)12” (304.8)

1” (25.4)

COLOUR

19” (482.6)19” (482.6)

FOR USE WITH SKYLIGHT

FOR USE WITH SKYLIGHT FOR USE WITH SKYLIGHT FOR USE WITH SKYLIGHT

COLOUR41/8” (104.8)

11/2” (38.1)

2” (50.7)

1” (25.4)3/4” (19.1)

1/2” (12.7) HEM

4 3/8”(111.1)

5/8”(15.9)

6”(152.4)

3/4”(19.1)

70º

COLOUR

5/8”(15.9)

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Fastening

To complete the metal roof installation, the following fasteners are used in wood-frame construction:

Fasteners must be properly driven to ensure proper seal and strength and provide allowance for expansion and contraction . See the diagram below for proper sheet metal screw fastening .

The Snap-Lok panel utilizes a concealed fastener system. One edge of the panel contains a punched flange to accept fasteners, while the other side snaps onto the rib of the adjacent panel. Panel fastening requirements differ based on geographic region, local weather characteristics and building codes. Wind forces on roofs are greatest at the corners and edges . Refer to the image below for typical wind pressure zones . Recommended pancake head fastener spacing for Snap-Lok panels is 15-1/2”.

#10 x 1” Pancake head wood screwsFor attaching concealed fastener coverings and roof panels .

#14 x 7/8” Stitch screw with self-sealing washerUsed to anchor the flashings metal to metal.

Stainless steel pop rivets (optional, not supplied by Westman)Used to connect flashings at corners.

#10 Hex head wood screw with self-sealing washer, various lengths availableSelf-sealing screw used for fastening flashings.

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Installation

Once material has been estimated and ordered, the roof panel installation can begin. Roof installation starts from the lowest point and continues upwards in the following general order:

Fascia trim

Eave protection and valley protection

Eave trims

Valley flashing

Underlayment

Roof panels

Gable trims

Ridge caps

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Installation

Westman Steel Snap-Lok panels are designed for installation over solid sheathing typically used in the construction of residential roof-decks.

Installation consists of the following steps:

• Accurately measure the roof, and create a roof plan for estimating and ordering roof panels and accessories

• Ensure all required roof penetrations are in place before beginning (pluming vents, exhaust, attic venting, etc.)

• Remove any dirt or debris from the roof surface

• Make sure there are no nails or other objects protruding from the roof that may puncture the new underlayment or damage the new roof panels

• Install Ice & Water shield at eaves a minimum distance of 60” upslope of the exterior wall, and valleys withone 36” roll centered with the valley. Check with local building codes for specific requirements. Also, installice & water shield at any penetrations or skylights

• Install Westman Steel Underlayment

• Install fascia and eave trims and valley flashings (refer to attached details)

• Check for squareness and layout the roof installation

• Align the first roof panel with the roof edge, and check for squareness and the proper panel overhang at theeave which will depend on the desired trim

• Fasten the first panel with the appropriate fasteners

• Install the next two panels loosely, constantly checking alignment with the roof. If the panels are correctlyaligned, fasten and engage the locking edge of the panels to the adjacent panels

• Continue with panel installation, periodically checking alignment and squareness and making adjustmentsas necessary

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Wood Framed Installation

Guidelines

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Wood Framed Installation

Guidelines

WOOD

“ PANCAKE SCREWS

WOOD SCREWS (OPTIONAL)

“ PANCAKE SCREW @ 15” O.C. NAILER STRIP(OPTIONAL IN AREAS PRONE TO HIGH WINDS)

WOOD SCREWS (OPTIONAL)

“ PANCAKE SCREWS

“ PANCAKE SCREW @ 15” O.C. NAILER STRIP(OPTIONAL IN AREAS PRONE TO HIGH WINDS)

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Wood Framed Installation

Fascia/Eave Without Gutter Detail

60”

FASCIA TRIM(REFER TO CATALOG #610, 611 OR 612)

(REFER TO CATALOG #609)

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Wood Framed Installation

Fascia/Eave With Gutter Detail

60

(REFER TO CATALOG #610, 611 OR 612)

(REFER TO CATALOG #608)

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Wood Framed Installation

Gable Trim Detail

“ PANCAKE

(REFER TO CATALOG #610, 611 OR 612)

(REFER TO CATALOG # 426S)

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Wood Framed Installation

Valley Flashing Detail

(REFER TO CATALOG # 588 OR 589)

(REFER TO CATALOG # 588 OR 589)

“ PANCAKE SCREW @

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Wood Framed Installation

Transition Flashing Detail

(REFER TO CATALOG # 606)

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Wood Framed Installation

Ridge Flashing Detail

(REFER TO CATALOG # 578 OR 583)

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Wood Framed Installation

Roll Vented Ridge Flashing Detail

(REFER TO CATALOG # 578 OR 583)

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Wood Framed Installation

RVR Vented Ridge Flashing Detail

(REFER TO CATALOG)

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Wood Framed Installation

RVR Vented Ridge Flashing Detail

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Wood Framed Installation

High Gable Detail

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Wood Framed Installation

End Wall Flashing Detail

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Wood Framed Installation

Sidewall Flashing Detail

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Wood Framed Installation

Panel Lap Detail

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