A lot of builders and homeowners are going with spray foam insulation because of the airtightness benefits but then the questioner mentioned that the spray foam contractor had intentionally left big holes to the outside by not sealing the gable vents.
Spray in the attic.
The use of spray foam attic can present many potential problems especially when it comes to the improper installation of this material within this area of your home.
If you don t have hvac and ducts in the attic spray foam on the roofline isn t really necessary.
Closed cell and open cell aka 2 pound and pound respectively.
It s generally 3 to 4 times what you ll pay for blown cellulose or fiberglass.
Use canned minimally expanding spray foam daptex plus window door foam sealant 7 for 16 ounces.
Earlier this year i got a question about a home that had spray foam insulation in the attic.
Spray foam installers may miss some of the air leakage sites in the attic which can lead to problems in the insulation of the attic.
They sport insulation values of approximately r 6 5 and r 3 6 per inch respectively.
The big disadvantage with spray foam is cost.
Choose from two types.
Spray foam offers the best attic insulation performance available.
Nothing unusual about that.
The practice of foam insulating the attic has raised eyebrows in the building industry because standard roofing techniques call for the attic to be ventilated.
Spray foam attic insulation.