Podcast Episode 82 — Brian’s Roof Question
Plus listener questions on wind-driven moisture, large-format tile, air-sealed crawlspaces, and cased openings.
In this episode, show regulars Justin Fink, Brian Pontolilo, and Rob Yagid talk about Brian’s roof history, leading to a question about how to clean moss off a shady roof. Seems like there is a chemical-spray option (like an outdoor bleach) and there’s a physical-removal option. But not a pressure-washer option, since you do not want to blow the asphalt granules off the roof.
Listener Jason is building a screened-in porch in “buggy Maine.” He is wondering about the best way to make a subfloor for the project, and he’s worried about “wind-driven moisture,” using a favorite term of Rob’s (also found in Popular Science and Green Building Advisor). Here are a couple photos he sent us:
Listener Andy is building a house and has a question about his 6-ft. high sealed crawlspace. He does not want it to get moldy and nasty. Can he use a heat-pump water heater to also keep the space dry?
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