30 Oct '13, 12pm

My latest at GBA Building Science: A Brief Introduction to WUFI, in 5 Easy Pieces

My latest at GBA Building Science: A Brief Introduction to WUFI, in 5 Easy Pieces

The screen shot below shows the main screen of WUFI 1-D. The first thing you do is set up the layers of your assembly. The one you see below has brick on the outside, a 1-inch air space, building paper Typically referring to Grade D building paper, this product is an asphalt-impregnated kraft paper that looks a lot like a lightweight asphalt felt. The Grade D designation has come to mean that the building paper passes ASTM D779 (minimum 10-minute rating with the “boat test”) and different products are called out as “30-minute” or even “60-minute” based on D779 results. At times confused with roofing felt, roofing felts and building paper differ in two ways: felts are made of recycled-content paper, building papers of virgin paper; felts are made of a heavier stock paper; building papers a lighter stock. See also roofing felt. , oriented strand board, fiberglass insulation,...

Full article: http://www.greenbuildingadvisor.com/blogs/dept/building-s...

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