Adit Cap

Large, high-quality, industrial stregth zippers with two pulls ensure smooth convenient zipping action for a long time.

Double Stitched where strength counts and single stitched where more flexibilty is required.

Custom plywood supports are factory installed to keep AditCap from sagging and scraping pull-down attic door hardware.

Insulation options range from unisulated to R-49!  AditCaps are sold BYOB (Bring Your Own Batt) or Filled (with the insulation already installed).  

Order 1 or 100 we have stock for the most common sizes and R-Values ready to ship now.  We run custom orders of any size too.

AditCap insulated pull-down stair enclosures reduce unwanted air infiltration and insulate more effectively than batting installed under the stairway. 

AditCap is attractive and makes it easy to show off your committment to energy efficiency and indoor air quality. AditCap is the perfect advertising medium for your company to get your message out.

Insulated AditCaps comply with or exceed ENERGY STAR, IECC, and state energy code requirements.  Contact us if you have special compliance requirements

Our latest innovations in materials, design, and construction are going into production in early 2021!  We have solved the structural issues caused by sewing through polyethylene foam that make the zipper seams fragile.  In our testing the G3 Tent is easier to pull from the staples holding it into the attic pull-down frame than it is to rip the zipper seam!