To insulate fold down attic stairs.
How to insulate attic stairs.
Assemble the sides of the box with metallic duct tape.
Apply weather stripping first check that your folding attic stairs are able to close securely and tightly.
Attach the foam box to the.
Do not apply the weather stripping to the hinge end.
Cut sides and top from sheets of 3 4 foam board with a utility knife.
Once the opening has been sealed it can be further insulated by building a foam box in the attic to enclose the stairs.
Weatherstrip the edges and put a piece of rigid foam board insulation on the back of the door.
More insulation 6 inches or 8 inches isn t uncommon.
If you have pull down attic stairs or an attic door these should be sealed in a similar manner.
Position the box over the stair opening in the attic.
Measure the size and height of the stairs from the attic.
If the flange of your zippered attic cover sits on top of insulation there is no way to caulk it in place.
The stairs themselves also need to be insulated and the bottom of the stringers should be air sealed with airtight drywall.
That means that you should glue at least 4 inches of foil faced polyisocyanurate r 26 to the box.
Caulking around the flange helps to further insulate the stairs by preventing air from escaping into the attic.
One way is to install 2 4 blocking behind the stringers.
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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.
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.
Then take your self adhesive foam weather stripping and apply it all around the perimeter of where the frame and the door meet.