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.
Spray in the attic.
Nothing unusual about that.
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.
There s no reason for an air conditioning and vent ductwork to have to work in that type of severe conditions.
It s generally 3 to 4 times what you ll pay for blown cellulose or fiberglass.
Spray foam attic insulation.
The big disadvantage with spray foam is cost.
I d blow insulation on the attic floor after air sealing of course.
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.
However in a vented attic situation it will become approximately 130 degrees in the summer.
Choose from two types.
If you don t have hvac and ducts in the attic spray foam on the roofline isn t really necessary.
Use canned minimally expanding spray foam daptex plus window door foam sealant 7 for 16 ounces.
They sport insulation values of approximately r 6 5 and r 3 6 per inch respectively.
Earlier this year i got a question about a home that had spray foam insulation in the attic.