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Results of Testing the Air Leakage Rate of the Product
Type of Wall Tested	Requirement^{Footnote (3)} (S742 Classification)	Air Leakage Rate After Wind Loading^{Footnote (1)} at 75 Pa ΔP	Air Leakage Rate After Wind Loading at –20°C and at 75 Pa ΔP²
Exterior gypsum/metal stud walls	A1 (≤ 0.05 L/s∙m²)	0.030 L/(s·m²)	0.042 L/(s·m²)^{Footnote (2)}
Concrete masonry units	A1 (≤ 0.05 L/s∙m²)	0.041 L/(s·m²)	0.044 L/(s·m²)^{Footnote (2)}

Notes:

Footnote 1

The air leakage rate of the specimens was determined after structural aging of the air barrier system. Aging of the air barrier system was conducted to qualify it for various Q50 design structural wind loads. For the stud wall, the air barrier system was subjected to a loading schedule involving one-hour sustained positive and negative pressure set at 1000 Pa, 2 000 cycles of positive and negative pressure set at 1630 Pa, wind gust of positive and negative pressure set at 2440 Pa, and deflection loading at ±1630 Pa for ten seconds. For the block wall, the air barrier system was subjected to a loading schedule involving one-hour sustained positive and negative pressure set at 1000 Pa, 2 000 cycles of positive and negative pressure set at 2560 Pa, wind gust of positive and negative pressure set at 3820 Pa, and deflection loading at ±2560 Pa for ten seconds.

Return to footnote 1 referrer

Footnote 2

The air leakage rate was determined in accordance with ASTM E 1424, "Standard Test Method for Determining the Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Pressure and Temperature Differences Across the Specimen," at an air temperature of –20°C to verify any deformation causing leakage at low temperatures.

Return to footnote 2 referrer

Footnote 3

The air leakage rate requirement is based on the Table for Rate of Permissible Air Leakage developed by CCMC/NRC with input from an industry consortium. Information in Table 4.1.1 is deemed to meet the intent of the NBC 2015 with regard to air barrier system performance.

Return to footnote 3 referrer

Permissible Air Leakage Rate
Water Vapour Permeance of Outermost Layer of Wall Assembly (ng/(Pa·s·m²))	Maximum Permissible Air Leakage Rate (L/s·m²) @ 75 Pa ΔP
15 < WVP ≤ 60	0.05
60 < WVP ≤ 170	0.10
170 < WVP ≤ 800	0.15
> 800	0.20

Results of Durability Testing of Components in the "WALLTITE® v.3 - Air Barrier System"
Component	Requirement	Result
"WALLTITE® v.3" urethane insulation	air permeance before and after aging (ASTM D 726-84): < 10% increase	Passed
"WALLTITE® v.3" urethane insulation	thermal resistance after heat aging and weathering: 90% retention	Passed
Transition membrane: Blue Skin SA by Henry® Company	physical properties before and after aging: 85% retention	Passed
Sealant at membrane/foundation junctions: Polybitume 570-05 by Henry® Company	complies with CAN/CGSB-37.29-M89	Passed
MasterSeal® NP1™ by BASF Canada	complies with ASTM C 920-14	Passed

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