Build Attic Stair Insulation Box

Finally i made the main insulated attic stair box cover. Whole house fans and ac returns. I also made the box wider and longer than the attic stair opening so that i could install weather stripping on the bottom to create a tight seal.

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The box should rest squarely on top of the attic stairs frame or on wood stops installed to.

Build attic stair insulation box.

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. That means that you should glue at least 4 inches of foil faced polyisocyanurate r 26 to the box. Installs easily without tools. More insulation 6 inches or 8 inches isn t uncommon.

Assemble the sides of the box with metallic duct tape. An attic stair cover provides an air seal reducing the air leaks. With attic insulation we aim for a pretty high standard usually at least r 49 and the coffin insulation should match. Add insulation to the exterior of the plywood box.

Measure the size and height of the stairs from the attic. Hinge the lid to the box on one side with metallic tape. An attic insulation box covers the attic ladder with insulation which stops the flow of air into your house and eliminates any drafts around the opening. Much like attic stairs above when whole house fans are installed.

An easy low cost solution to this problem is to add an attic stair cover. Add the desired amount of insulation over the cover to restore the insulation removed from the ceiling. The box is hinged on one side which makes. I made the box wider than the custom piece so it would fit over the first box.

Position the box over the stair opening in the attic. Attic stairs insulation cover for pull down stair 25 x 54 x 11 r value 15 3 extra thick fire proof attic cover stairway insulator with easy installation attic stairway cover 4 7 out of 5 stars 146. Insulated attic stair cover box. Cut sides and top from sheets of 3 4 foam board with a utility knife.

Attach the foam box to the floor with metallic tape. 4 attach the blanket insulation and wrap it. Insert the insulation into the reflective shield and place the stair cover rigid box into the reflective shield covering the insulation. The shield holds the insulation to the box.

Additional insulation not included may be added to the sides or insulate the attic up to the sides of the stair cover kit.

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