Sep 11, 2009 · The more rigorous standard, ASTM D 226, requires a minimum weight of 11.5 pounds per square. Most lumberyards stock only light-weight asphalt felt with no ASTM rating. …

Apr 26, 2019 · I'm open to using another type of WRB but was steered toward using the #30 Felt as the Cedar Shake and Shingle Bureau recommends it their Exterior and Interior Wall Manual …

Jan 2, 2011 · But, if I used sheathing (preferably sawn lumber boards for breatheability and durabiity), then I always prefer #15 felt, and preferably ASTM D226 #15 felt (11.5 – 12.5 lbs …

Apr 14, 2010 · The WRB should be on the weather side, directly behind the cladding, and it should be #15 felt so it won't be degraded by the surfactants in the cedar, ASTM D226 felt if …

ASTM D4869 #15 felt can be 8.0 – 9.7 lbs/square. And ASTM D226 #15 felt must be 11.5 – 12.5 lbs/square (which is the code standard for WRBs). Asphalt-saturated rag felt has proven itself …

Nov 12, 2010 · I live in Northern California - 5 months of heating season - wet cold weather, no snow, rarely go below freezing. Dry summer and I don't plan to have AC. I am planning on …

Nov 8, 2024 · A similar test standard is ASTM E1233, which uses the same testing parameters, but includes cyclic or varying pressure differentials to simulate wind gusts instead of constant …

Dec 12, 2023 · Patrick, The PHIUS 2021 guidebook has two airtightness requirements for single family construction. 0.06 CFM50/sf of envelope area is the requirement for the performance …

ASTM qualifies roofing felts with the following ratings: ASTM D4869 (Type 1 with a minimum weight of 8 pounds per 100 square feet) and ASTM D226 (Type 2 with a minimum weight of …

Apr 21, 2016 · Does anyone has a reliable chart or table for brick lintel length on each side of a brick wall opening? I've contacted brick suppliers and contractors, and apparently is all done …