The first piece of the attic stair cover is installed between the truss members while the second piece installs over the plywood sub floor and overlaps the first piece.
Diy attic door cover.
Treat the attic door like a door to the outside.
Either of these materials provide little if any insulation.
Attic doors are typically covered with a thin sheet of plywood or a drywall remnant.
To build the attic stair cover i decided to use two inch thick foil faced foam board by dow tuff r.
If you have pull down attic stairs or an attic door these should be sealed in a similar manner.
Panady attic stairs insulation cover 25 x 54 x 11 class a fireproof attic door insulation cover attic access insulation cover attic stairway insulator attic ladder insulation cover.
Assemble the sides of the box with metallic duct tape.
Note that thin plywood tends to warp under extreme cold or heat allowing more cool or hot air to escape through the gaps.
The covered opening becomes a significant point of.
Attach the blanket insulation to the attic side of the cover box with adhesive and wrap it with building wrap or other air barrier to prevent air movement in the insulation from degrading its r value.
Basically a scuttle attic is a hole in the drywall ceiling that leads to the attic with a small attic access panel that covers it.
I found a good article that has a bit more information on scuttle attics if you d like to read more.
Attach the foam box to the floor with metallic tape.
The benefits of this design are.
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Weatherstrip the edges and put a piece of rigid foam board insulation on the back of the door.
I took 3 measurements in the attic inside the cover and 4 feet from the floor of the room.
Pre made insulated attic stair covers are also available from local home improvement centers or on the web.
Step 2 tape the foam together.
Continue to sealing air leaks.
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For additional details and images download the seal and insulate diy guide pdf 12 8 mb.
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If your attic door is made of thin plywood you will need a thicker piece of foam to reinforce it.
Position the box over the stair opening in the attic.
The box should rest squarely on top of the attic stairs frame or on wood stops installed to support it.
1 inexpensive 20 usd and easy to make 2 reduce heat transferred during the summer.
Our small little attic access panel would technically be referred to as a scuttle attic.
The tuff r has an r value of 13 for 2 inches and a foil facing which works great as a radiant heat barrier as well.
To prevent this from happening you need to reinforce the plywood with thick foam.
Then add insulation batting to form a pillow and wrap it up like a birthday present as shown.
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Add foam insulation tape around the edges to seal the perimeter where it rests in the access hole.
Cut sides and top from sheets of 3 4 foam board with a utility knife.
Staple long pieces of duct tape sticky side up onto the attic scuttle door.