Use canned minimally expanding spray foam daptex plus window door foam sealant 7 for 16 ounces.
Attic foam sealant.
Earlier this year i got a question about a home that had spray foam insulation in the attic.
In a vented attic all of that expensive airflow is lost to the environment.
Find the lighting electrical box for each room and cover it with a dose of spray foam.
Activate can by pulling the trigger.
Foam should be tack free in 10 to 15 minutes.
Top plate to attic drywall air sealing is consistently ranked as the 1 air sealing location.
One huge benefit of the spray foam insulated attic is that conditioned air leakage from the ac furnace duct system is contained and used to condition the attic.
You are not trying to shove foam down the wall but rather make an air tight cap on top.
Invert can and insert it into the gap around the attic hatch.
Find electrical wires that are penetrating the ceiling.
Nothing unusual about that.
Wipe away imperfections with a cloth soaked in great stuff foam cleaner.
Great stuff pro gasket forms a seal between framing lumber and drywall which can result in up to 1 6 ach50 reductions.
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.
Water based polyurethane foam sealant.
Stick the spray foam nozzle in the hole with it and give it a quick squirt.
Attic systems is the largest network of attic air sealing insulation contractors in north america and we can help you make your home more comfortable all year long.