Spray foam against underside of roof deck? Or install vent baffles ...
2019年7月10日 · You pretty much have to destroy a roof assembly that has been insulated with spray foam if you want to remove any of the sheathing, for example. By simple averages and …
Does Spray Foam in the Attic Make It a High-Performance Home?
2021年5月27日 · It’s been viewed 14,000 times this year already, and millions of times since I wrote it in 2010. If people weren’t having trouble with spray foam insulation, this article …
Spray foam the ceiling joists vs. the back of the roof sheathing?
2016年8月23日 · Our customers have reported low electric bills with less initial investment than spraying the roof deck. I would love to see a case study with (#1- 5.5" Roof Deck Foam, no …
Closed-cell spray foam insulation: between rafters or joists?
2018年10月19日 · Five inches of spray foam isn't enough to meet minimum code requirements. As Dana said, if you have HVAC equipment in your attic, the insulation should follow the …
Spray foam directly on underside of roof? - GreenBuildingAdvisor
2016年2月9日 · I have a conditioned attic, currently insulated with R19 fiberbatts between the rafters. No airsealing, hence I want to remove the fiberbatts and spray 3 inches of closed cell …
Metal roof over unvented, spray foam attic - GreenBuildingAdvisor
2020年6月15日 · The entire attic is also unvented. We’ve had some leaks that took some time to notice because we couldn’t see the leaks in the spray foam until the moisture reached a ceiling …
Creating a Conditioned Attic - GreenBuildingAdvisor
2010年12月31日 · If you want to create an unvented roof assembly -- that is, an assembly that lacks the ventilation gap between the insulation and the roof sheathing -- you have only two …
Cost of spray foam under roof deck - GreenBuildingAdvisor
2020年3月29日 · If you do go with an unvented roof, you need to worry about the ratio of spray foam to fluffy stuff to avoid moisture issues, or use all spray foam. Unless you’re trying to finish …
Three Ways to Insulate Roofs - GreenBuildingAdvisor
2021年12月23日 · The third way is to use closed-cell spray polyurethane foam on the underside of the roof sheathing, which creates a conditioned attic. Closed-cell is the best type of foam to …
How to detect a roof leak after having the underside of the roof …
If you were the type of homeowner who was obsessed with roof leaks -- or if you were a roofer -- you might have chosen to live in a house with a ventilated unconditioned attic. That type of …