Attach the foam box to the.
How to insulate attic stairs.
The stairs themselves also need to be insulated and the bottom of the stringers should be air sealed with airtight drywall.
Insulate attic drop down access stairs insulation for pull steps savings project cover box an stair big energy construct battic door r 50 the guardian 38 ladder how to insulate attic drop down access stairs today s homeowner insulation for pull down attic steps hometalk savings project attic stairs cover box department of energy how read more.
Assemble the sides of the box with metallic duct tape.
Once the drywall is installed you can fill the gap with spray foam.
Add insulation to the exterior of the plywood box.
One way is to install 2 4 blocking behind the stringers.
Caulking around the flange helps to further insulate the stairs by preventing air from escaping into the attic.
Then take your self adhesive foam weather stripping and apply it all around the perimeter of where the frame and the door meet.
More insulation 6 inches or 8 inches isn t uncommon.
Cut sides and top from sheets of 3 4 foam board with a utility knife.
If the flange of your zippered attic cover sits on top of insulation there is no way to caulk it in place.
Apply weather stripping first check that your folding attic stairs are able to close securely and tightly.
Measure the size and height of the stairs from the attic.
Cut a piece of fiberglass or rigid foam board insulation the same size as the attic hatch and nail or glue it to the back of the hatch.
Position the box over the stair opening in the attic.
To insulate fold down attic stairs.
Weatherstrip the edges and put a piece of rigid foam board insulation on the back of the door.
With attic insulation we aim for a pretty high standard usually at least r 49 and the coffin insulation should match.
That means that you should glue at least 4 inches of foil faced polyisocyanurate r 26 to the box.
Begin by checking to see if the attic stairs close tightly then apply self adhesive foam weather stripping around the perimeter where the plywood door meets the frame except on the hinge end.