central ny engineering expo, syracuse, ny klepper, hahn ... aloisio... · pdf...

Klepper, Hahn & Hyatt Structural Engineering
315.446.9201 Landscape [email protected] Building Envelope Systems
Central NY Engineering Expo, Syracuse, NY
Jim DAloisio, P.E., SECB, LEED AP

Complicated and Labyrinthian Multi-referential and not concise Strict and unforgiving Not well understood Not always enforced Mandatory for most buildings Cannot be waived by code officials Rational and necessary

28 DEC 2010ECCCNYS-10 adopted for commercial and residential, based on IECC-09, referencing ASHRAE 90.1-07 and introducing air barrier requirements.
1 JAN 2015Commercial ECCCNYS-14 adopted, based on IECC-12, referencing ASHRAE 90.1-10 Residential not included.
3 OCT 2016 ECCCNYS-15 to be adopted for commercial and residential, based on IECC-15, referencing ASHRAE 90.1-13 Requires blower door testing for most residences.

Current NYS ECCC Commercial Codehttps://www.dos.ny.gov/dcea/energycode_code.html
Notice of Adoptions for ALL NYS Codes http://www.dos.ny.gov/dcea/noticadopt.html
2016 Supplement to NYS ECCC Effective 3 Oct http://www.dos.ny.gov/dcea/pdf/2016%20DOS%20Energy%20Code%20Supplement%202016-03-13.pdf
https://www.dos.ny.gov/dcea/energycode_code.htmlhttp://www.dos.ny.gov/dcea/noticadopt.htmlhttp://www.dos.ny.gov/dcea/pdf/2016 DOS Energy Code Supplement 2016-03-13.pdf

1 JAN 2015
ECCCNYS-14 (IECC-12)
R = 25
ASHRAE 90.1-10R = 20
3 OCT 2016
ECCCNYS-15(IECC-15)
R = 30
ASHRAE 90.1-13R = 30
28 DEC 2010
R = 20
ASHRAE 90.1-07R = 20

1 JAN 2015
R = 30
ASHRAE 90.1-10R = 20
3 OCT 2016
ECCCNYS-15(IECC-15)
R = 30
ASHRAE 90.1-13R = 30
28 DEC 2010
R = 20
ASHRAE 90.1-07R = 20

Residential One and two family homes Multiple single-family dwellings
(townhouses) Group R-2, R-3, R-4 3 stories or less
above grade
Commercial Everything else
Exempt Unheated buildings,

Team decision Prescriptive and mandatory
requirements vary slightly Take NYS modifications into account Entire building project must be based on
same code cant use elements of each

Prescriptive Method Variations C402.1 Envelope Options:
Insulation R-Value C402.1.3 Assemblies U, C, F-Factor C402.1.4 Component Performance C402.1.5
Mechanical, Electrical, Plumbing Performance Method Chapter C407

All R-values are MINIMUM Only insulation is prescribed no
accounting for rest of assemblies Cannot average R-Values Not the spirit of this compliance path Heat flow doesnt work that way
Thermal mass effect is approximated Table is full of simplistic assumptions Doesnt account for all thermal bridging Still need to comply with Mandatory items
PrescriptiveMethod #1

Includes thermal conductivity of entire assemblies, including air films
Must include separate determination of all different envelope areas
Thermal bridging effects should be included, but U-factor calculation needed
Thermal mass effect is approximated Cannot trade off efficiencies, i.e. better
roof UA factor for lower wall UA factor Still need to comply with Mandatory items

SeriesAdd up R-values along the path of heat flow
Parallel Heat chooses path of least resistance

The U-Factor is the actual rate of heat flow through the insulation U=1/R
Reff = (Rmax-Rmin)/ln(Rmax/Rmin)
0
10
20
30
40
50
60
1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8
R-VALUEInches of Aged Polyisocyanurate Insulation
0.000
0.020
0.040
0.060
0.080
0.100
0.120
0.140
0.160
0.180
1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8
U-FACTORInches of Aged Polyisocyanurate Insulation
The R-Value is simply the amount of heat resistance presentR=1/U

R=2 R=6 R=10 Avg. R=6 NO!
>> U=0.5 U=0.17 U=0.10 Avg. U=0.26
This equates to an actual average R-value of R=1/U= 3.9

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R-Value: R-30 Minumumregardless of additional insulation thickness needed for tapering to drains
U-Factor: U 0.032 Max.
5 Polyiso minimum
4 to 7 Polyiso
3 to 8 Polyiso
2 to 11 Polyiso
1 to 15 Polyiso
distance doesnt matter
U-0.032 (Avg.)
U-0.032 (Avg.)
U-0.032 (Avg.)
U-0.032 (Avg.)R-30 (Min.)
Single-slope insulation options
Aged R-value is 5.7 per inch

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R-Value: R-30 Minimumregardless of additional insulation thickness needed for tapering to drains
U-Factor: U 0.032 Max.
8.5 Mineral Fiber minimum
distance doesnt matter
U-0.032 (Avg.)
U-0.032 (Avg.)
U-0.032 (Avg.)
U-0.032 (Avg.)R-30 (Min.)
Single-slope insulation options
7 to 9 Mineral Fiber
R-3.7 per inch

1. Identify and tally areas with different insulation patterns.
2. Calculate average R-value for each area, using tables or other methods (do NOT average depth)
3. Invert (U = 1/R) for each area4. Tally total (UxA) for all areas5. Divide by total area6. Invert to get average R-value

Using the R-Value Prescriptive Method, Can You Average R-Values?

Component Equivalent U-Factor
Outside air film R-0.17
Wood siding R-0.8
1/12 Plywood sheathing R-0.62
R-13 Mineral Fiber w/ 2x4 Wood studs @ 16 R-12.44
Gypsum wallboard R-0.56
Interior air film R-0.68
Total R-Value
Equivalent U-Factor (1/R)
Maximum Allowable U-Factor
R-16.86
0.060 Climate Zones 4 & 5
0.045 Climate Zone 6
WALL
(See Table C402.1.3)
0.059

J. Straube, 2007Building Science Corp.
All studs 16 o.c.

Unmitigated Detail:U-Factor for 36 height = 0.44
Alternate Detail:U-Factor for 36 height = 0.13

Proprietary system for brick shelf angle support
Comes in both galvanized & stainless steel

Original Detail Modified Detail

Original Detail: Continuous angle supporting wood roof blocking
Modified Detail: Clip angle, 6 long, 24 o.c. supporting wood roof blocking

High School, Upstate NYOnly supporting 24 inches
of brick

Original Detail: Steel cantilever beam attached directly to interior steel support
Modified Detail: MSTBA between cantilever beam and interior steel support

SYRACUSE UNIVERSITY MANLEY FIELDHOUSEICE STORAGE ADDITION - 2012

Paint with aerogel insulation added for conductive resistance
R-4.1 per inch, applied 25-50 mils = R-0.1 to 0.2 total
Mainly used to reduce potential for condensation
Requires surface prep, prime coat, and protection coat
Apply to steel 24 inches out from insulation plane on both interior and exterior sides
Verify insulation properties of paint - there are imposters!
Photo credits: Greg Pope / Righter Group, Inc.

Carbon Stainless Fiberglass Steel Steel

Condensation at low-heeled wood roof trusses + rafters
Solutions:
1. Insulatearound heels
2 . Installinsulatedcrown molding

Balcony Slab

Trade off heat flow potential through A. Roof areas (U-factor x area)B. Opaque wall areas (U-factor x area)C. Fenestration areas (U-factor x area)D. Slab on grade edges (F-factor x length)E. Below grade wall ins. (C-factor x area)
Thermal bridging effects can and should be included, but U-factor calculation needed
Thermal mass effect is approximated Still need to comply with Mandatory items

Uses Component Trade-Off Method
Choose either IECC or ASHRAE 90.1
Clearly organizes relevant information
Helpdesk answers questions within 2 days
Straightforward and flexible
Free!
Download COMCheckhttps://www.energycodes.gov/comcheck
https://www.energycodes.gov/comcheck

Energy modeling to show energy costs of proposed building 85% of model building
Model building is modeled using prescriptive U-factor requirements
Thermal bridging effects can and should be included, and not ignored
Thermal mass effect is approximated in both model building and proposed
Still need to comply with Mandatory items

What are the different building envelope compliance paths for the Energy Code?(hint: There are FOUR)
Prescriptive R-Value
Prescriptive U, C, and F Factor
Building Envelope Component Trade-off (COMcheck)
Performance (energy modeling)

Air Barrier C402.5 test or comply with: Continuous, sealed edges, pens C402.5.1.1 Approved matls or assemblies C402.5.1.2 Fenestration C402.5.2 Fuel-burning appliances C402.5.3 Door and access openings C402.5.4 Air intakes, opngs, stairs, shafts C402.5.5 * Loading dock weatherseals C402.5.6 * Vestibules C402.5.7 * Recessed lighting C402.5.8OR 75 Pa blower door test < 0.40 cfm/ft2

central ny engineering expo, syracuse, ny klepper, hahn ... aloisio... · pdf...

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