Recent Q&A

• Moisture on Roof Sheathing

  1961 home with 2:12 pitch roof, very shallow attic (~24” at peak), drop ceiling with can lighting. Attic: R-19 insulation on top of the ceiling (nothing against sheathing) Attic ventilation…

• Solar Attic Fans in Hawaii?

  Hello,We have a low-slope (2:12) pitch and a very shallow attic space with R-19 fiberglass insulation in Hawaii.The attic is ventilated with soffit and eve vents. I have been told…

• Insulating a Low-Sloped Roof

  I have a question about insulating a roof in Hawaii -- we don't get temperatures below 75, humidity is moderate; so, wondering what applies in our environment. CURRENT ROOF:…

• Insulating Above a Roof Deck

  Hello, We plan to insulate above our roof deck in Hawaii (2:12 pitch over most of the home, low/flat over a 20x15' section) with Polyiso. We then planned for a…

• Vaulted open-beam ceiling in Hawaii — concern for trapping moisture?

  Hello GBA,We have an old Hawaii home that is open air –windows open 24/7. The inside and outside are warm with a pretty high humidity.The main room is a high…

• What is the R-Value of Canec

  Hello,We have a 1961 home in Hawaii and it has a low slope (2:12) roof with ~ 2" of canec on top of an open beam ceiling.Canec is the common…

• Foam insulation on top of Bitumen low-slope roof?

  Hello,QUESTION: Pros/Cons of spraying foam on top of roof for insulation, then coating with Acrylic or SiliconeLocation: Hawaii (warm all year, very high UV, no heating)Home: Single story 1960’s shallow…

• Roof coatings: acrylic vs silicone

  Hello,I am trying to understand the Pro/Con of Acrylic vs Silicone coatings.Location: Hawaii (warm all year, very high UV, no heating)Home: Single story 1960’s shallow pitch (2:12) with very low…

• TPO roofing: do I need to be concerned with moisture buildup?

  Hello,I am planning to have a TPO roof installed on my home.Current Roof: 2-ply Bitumen peel and stick on top of 5/8” plywood. Roof is 3 years oldHome is 1960's…

• Split AC: How to mitigate mold concerns? Or, other ways to cool leaky homes

  Hello, Our home is a very leaky 1961 home in Hawaii. Some experts here rightfully suggest controlling our indoor climate with air conditioning. We definately like the idea of lowering…