It s usually the hardest place to air seal because the cramped space underneath the eaves where the roof rafters rest on the outer wall makes it hard to move your hands and head.
Sealing wall in attic.
To properly seal your attic hatch also known as an attic door or scuttle hole at a minimum you should apply weather stripping and ensure the attic side of the attic door is insulated.
Heat is vertically polarized so insulation in the attic should be at least twice as much as in the walls.
Not the r factor of the walls and celling.
But the biggest killer for heat loss is infiltration rate.
Air sealing the attic perimeter.
Energy star states that the most significant air leaks are often hidden in the attic below the insulation.
When you re done sealing your attic bypasses push the insulation back into place with an old broom handle or stick as you back out of the attic.
Before installing drywall install caulk or other sealant or a foam gasket to the face of the top plate then install the.
Then finish up by sealing the access hatch with self sticking foam weatherstrip photos 10 and 11.
Air sealing the wall plate around the perimeter of your attic blocks air from escaping around the outer edges of your home.
The disadvantage is that it would be very very hard to reach the desired r value from r 49 to r 60 depending on climate for attic insulation.
If your hatch rests directly on the moldings like ours did add 2 1 2 in wide stops around the.
Install drywall then seal the seam from the attic side with caulk foam or drywall adhesive but not other construction adhesives.
Sealing attic hatch attic door.
Air seal drywall to top plates at all attic wall interfaces to minimize air leakage.
And having thermo pane windows are worthless if air is leaking around the sill.