Proposed Change 690

690
Last modified: 2013-10-30
Code Reference(s):
NBC10 Div.B 9.26.2.
Subject:
Roofing, Dampproofing and Waterproofing Standards
Title:
9.26.2.2. Application of Materials
Description:
This proposed change inserts a new Article 9.26.2.2. to state that materials listed in the new Table 9.26.2.1. shall be installed in accordance with manufacturer's instructions. This replaces the need for application standards.

EXISTING PROVISION

9.26.2. Roofing Materials

9.26.2.1.Material Standards
1)Roofing materials shall conform to
a)CAN/CGSB-37.4-M, "Fibrated, Cutback Asphalt, Lap Cement for Asphalt Roofing",
b)CAN/CGSB-37.5-M, "Cutback Asphalt Plastic, Cement",
c)CAN/CGSB-37.8-M, "Asphalt, Cutback, Filled, for Roof Coating",
d)CGSB 37-GP-9Ma, "Primer, Asphalt, Unfilled, for Asphalt Roofing, Dampproofing and Waterproofing",
e)CGSB 37-GP-21M, "Tar, Cutback, Fibrated, for Roof Coating",
f)CAN/CGSB-37.50-M, "Hot-Applied, Rubberized Asphalt for Roofing and Waterproofing",
g)CGSB 37-GP-52M, "Roofing and Waterproofing Membrane, Sheet Applied, Elastomeric",
h)CAN/CGSB-37.54, "Polyvinyl Chloride Roofing and Waterproofing Membrane",
i)CGSB 37-GP-56M, "Membrane, Modified, Bituminous, Prefabricated, and Reinforced for Roofing",
j)CGSB 41-GP-6M, "Sheets, Thermosetting Polyester Plastics, Glass Fiber Reinforced",
k)CAN/CGSB-51.32-M, "Sheathing, Membrane, Breather Type",
l) , "",
m)CAN/CSA-A123.2, "Asphalt-Coated Roofing Sheets",
n)CSA A123.3, "Asphalt Saturated Organic Roofing Felt",
o)CAN/CSA-A123.4, "Asphalt for Constructing Built-Up Roof Coverings and Waterproofing Systems",
p)CSA A123.17, "Asphalt Glass Felt Used in Roofing and Waterproofing",
q)CAN/CSA-A220.0, "Performance of Concrete Roof Tiles",
r)CSA O118.1, "Western Red Cedar Shakes and Shingles", or
s)CSA O118.2, "Eastern White Cedar Shingles".
9.26.2.2.Nails
1)Nails used for roofing shall be corrosion-resistant roofing or shingle nails conforming to CSA B111, "Wire Nails, Spikes and Staples".
2)Nails shall have sufficient length to penetrate through, or 12 mm into, roof sheathing.
3)Nails used with asphalt roofing shall have a head diameter of not less than 9.5 mm and a shank thickness of not less than 2.95 mm.
4)Nails used with wood shingles or shakes shall have a head diameter of not less than 4.8 mm and a shank thickness of not less than 2.0 mm and shall be stainless steel, aluminum or hot-dipped galvanized. (See Appendix AEXISTING PROVISION A-9.26.2.2.(4).)
9.26.2.3.Staples
1)Staples used to apply asphalt or wood shingles shall be corrosion-resistant and shall be driven with the crown parallel to the eaves.
2)Staples used with asphalt shingles shall be not less than 19 mm long, 1.6 mm diam or thickness, with not less than a 25 mm crown, except that an 11 mm crown may be used as provided in Sentence 9.26.7.4.(2).
3)Staples used with wood shingles shall be not less than 29 mm long, 1.6 mm diam or thickness, with not less than a 9.5 mm crown and shall be stainless steel or aluminum. (See A-9.26.2.2.(4)EXISTING PROVISION A-9.26.2.2.(4) in Appendix A.)
A-9.26.2.2.(4) Fasteners for Treated Shingles.
Where shingles or shakes have been chemically treated with a preservative or a fire retardant, the fastener should be of a material known to be compatible with the chemicals used in the treatment.

PREVIOUSLY APPROVED PROPOSED CHANGE

9.26.2. Roofing Materials

9.26.2.1.Material Standards
1)Roofing materials shall conform to
a)CAN/CGSB-37.4-M, "Fibrated, Cutback Asphalt, Lap Cement for Asphalt Roofing",
b)CAN/CGSB-37.5-M, "Cutback Asphalt Plastic, Cement",
c)CAN/CGSB-37.8-M, "Asphalt, Cutback, Filled, for Roof Coating",
d)CGSB 37-GP-9Ma, "Primer, Asphalt, Unfilled, for Asphalt Roofing, Dampproofing and Waterproofing",
e)CGSB 37-GP-21M, "Tar, Cutback, Fibrated, for Roof Coating",
f)CAN/CGSB-37.50-M, "Hot-Applied, Rubberized Asphalt for Roofing and Waterproofing",
g)CGSB 37-GP-52M, "Roofing and Waterproofing Membrane, Sheet Applied, Elastomeric",
h)CAN/CGSB-37.54, "Polyvinyl Chloride Roofing and Waterproofing Membrane",
i)CGSB 37-GP-56M, "Membrane, Modified, Bituminous, Prefabricated, and Reinforced for Roofing",
j)CGSB 41-GP-6M, "Sheets, Thermosetting Polyester Plastics, Glass Fiber Reinforced",
k)CAN/CGSB-51.32-M, "Sheathing, Membrane, Breather Type",
l) , "",
m)CAN/CSA-A123.2, "Asphalt-Coated Roofing Sheets",
n)CSA A123.3, "Asphalt Saturated Organic Roofing Felt",
o)CAN/CSA-A123.4, "Asphalt for Constructing Built-Up Roof Coverings and Waterproofing Systems",
p)CSA A123.17, "Asphalt Glass Felt Used in Roofing and Waterproofing",
q)CAN/CSA-A220.0, "Performance of Concrete Roof Tiles",
r)CSA O118.1, "Western Red Cedar Shakes and Shingles", or
s)CSA O118.2, "Eastern White Cedar Shingles".
9.26.2.2.Nails
1)Nails used for roofing shall be corrosion-resistant roofing or shingle nails conforming to
a)ASTM F 1667, "Driven Fasteners: Nails, Spikes, and Staples ", or
b)CSA B111, "Wire Nails, Spikes and Staples".
2)Nails shall have sufficient length to penetrate through, or 12 mm into, roof sheathing.
3)Nails used with asphalt roofing shall have a head diameter of not less than 9.5 mm and a shank thickness of not less than 2.95 mm.
4)Nails used with wood shingles or shakes shall have a head diameter of not less than 4.8 mm and a shank thickness of not less than 2.0 mm and shall be stainless steel, aluminum or hot-dipped galvanized. (See Appendix APREVIOUSLY APPROVED PROPOSED CHANGE A-9.26.2.2.(4).)
9.26.2.3.Staples
1)Staples used to apply asphalt or wood shingles shall be corrosion-resistant and shall be driven with the crown parallel to the eaves.
2)Staples used with asphalt shingles shall be not less than 19 mm long, 1.6 mm diam or thickness, with not less than a 25 mm crown, except that an 11 mm crown may be used as provided in Sentence 9.26.7.4.(2).
3)Staples used with wood shingles shall be not less than 29 mm long, 1.6 mm diam or thickness, with not less than a 9.5 mm crown and shall be stainless steel or aluminum. (See A-9.26.2.2.(4)PREVIOUSLY APPROVED PROPOSED CHANGE A-9.26.2.2.(4) in Appendix A.)
A-9.26.2.2.(4) Fasteners for Treated Shingles.
Where shingles or shakes have been chemically treated with a preservative or a fire retardant, the fastener should be of a material known to be compatible with the chemicals used in the treatment.

PROPOSED CHANGE

[9.26.2.] 9.26.2. Roofing Materials

[9.26.2.1.] 9.26.2.1.Material Standards
[9.26.2.2.] ---Installation of Materials
[1] --)Materials listed in Tables 9.26.2.1.A. and 9.26.2.1.B. shall be installed in conformance with the manufacturer’s written instructions. (See Sentence 1.5.1.2.(1) of Division A-2015.)
[9.26.2.3.] 9.26.2.2.Nails
[9.26.2.4.] 9.26.2.3.Staples

RATIONALE

Problem

No specific application standards are referenced. The current code wording or requirements does not consistently address installation for roofing materials.

Justification - Explanation

Roofing application standards are in some cases referred to in the roofing material standards that are referred to in Article 9.26.2.1. Guidance, by way of referring back to manufacturer instructions, is provided as to where installation requirements can be found if they are not provided inside the material standards.

In the case where the requirements of a referenced standard do not agree or are in conflict with the code requirements, as per DivA-1.5.1.2., the requirements in the code govern.

Cost implications

None – following manufacturer instruction is already accepted good practice

Enforcement implications

Facilitates enforcement by clarifying where installation requirements can be found

Who is affected

Builders, roofing contractors, building officials

OBJECTIVE-BASED ANALYSIS OF NEW OR CHANGED PROVISIONS

[9.26.2.1.] 9.26.2.1. ([1] 1) [F61-OH1.1,OH1.2,OH1.3]
[9.26.2.1.] 9.26.2.1. ([1] 1) [F61-OS2.3]
[9.26.2.2.] -- ([1] --) [F61-OH1.2,OH1.3,OH1.1]
[9.26.2.2.] -- ([1] --) [F61-OS2.3]
[9.26.2.3.] 9.26.2.2. ([1] 1) [F20,F80-OH1.1,OH1.2,OH1.3]
[9.26.2.3.] 9.26.2.2. ([1] 1) [F20,F80-OS2.3]
[9.26.2.3.] 9.26.2.2. ([2] 2) [F20-OH1.1,OH1.2,OH1.3]
[9.26.2.3.] 9.26.2.2. ([2] 2) [F20-OS2.3]
[9.26.2.3.] 9.26.2.2. ([3] 3) [F20-OH1.1,OH1.2,OH1.3]
[9.26.2.3.] 9.26.2.2. ([3] 3) [F20-OS2.3]
[9.26.2.3.] 9.26.2.2. ([4] 4) [F20,F80-OH1.1,OH1.2,OH1.3]
[9.26.2.3.] 9.26.2.2. ([4] 4) [F20,F80-OS2.3]
[9.26.2.4.] 9.26.2.3. ([1] 1) [F20,F80-OH1.1,OH1.2,OH1.3]
[9.26.2.4.] 9.26.2.3. ([1] 1) [F20,F80-OS2.3]
[9.26.2.4.] 9.26.2.3. ([2] 2) [F20-OH1.1,OH1.2,OH1.3]
[9.26.2.4.] 9.26.2.3. ([2] 2) [F20-OS2.3]
[9.26.2.4.] 9.26.2.3. ([3] 3) [F20,F80-OH1.1,OH1.2,OH1.3]
[9.26.2.4.] 9.26.2.3. ([3] 3) [F20,F80-OS2.3]