William B. Rose

William B. Rose is a former builder and woodworker who‘s done research on heat, air, and moisture in buildings. He is currently Senior Research Architect at the Applied Research Institute, University of Illinois at Urbana-Champaign. He is the author of Water in Buildings (Wiley, 2005), and he wrote the chapter on building envelopes in the 2019 ASHRAE Energy Guideline for Historic Buildings.

Does Foam Insulation Keep CMUs From Drying?
Insulating concrete-block walls can keep a basement or crawlspace dry, but does preventing inward drying harm the concrete?
Does a roof always need to be vented?
Q: Our house will have cathedral ceilings. Is an airspace between the insulation and roof sheathing necessary? I am concerned about a loss in energy efficiency if there is no…
Asphalt-shingle failure over SIPs
Q: I built a timber-frame home eight years ago that is enclosed with structural insulated panels (SIPs). I installed heavy-duty architectural roof shingles over this code-permitted unvented roof, but the shingles…
Treating a crawlspace as a basement
Q: I’m building a new home soon, and my builder wants to try an unconventional type of heating system. The crawlspace would be insulated and heated by small openings cut into…
Ridge vent without soffit vent
Q: I recently remodeled my home using scissor trusses to create a cathedral-roof section. The trusses terminate at a beam on each side. I’ve just started to notice moisture soaking…
Foundation drainage in winter
Q: I just read William B. Rose’s excellent article, Details for a Dry Foundation. But nothing in his article or in any other that I’ve read deals with the problem of…
Details for a Dry Foundation
Think of the ground around the house as the roof that keeps the foundation dry.
Venting a shed roof
Q: My 14-year-old house has a cathedral ceiling under a shed roof. In other words, the rafters butt into a beam that carries the clerestory wall above. I used Prop-a-Vent…

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