Legendary - R-40 Capable - Pull Down Attic Stair Cover

  • Year-round energy savings
  • Utility tested & approved
  • Durable construction
  • Lightweight for easy placement and removal
  • Fits all standard pull-down attic stairs
  • Kit includes patent-pending Max-R accessory component to facilitate R-40 or higher over the attic stair opening
  • Made in the USA

The Therma-Dome PULL-DOWN ATTIC STAIR COVER is designed to air seal and insulate your attic opening, blocking the escape of home heating dollars in the winter and providing greater comfort and reduced cooling costs during the summer.

Constructed of 1 ½” thick polyisocyanurate foam insulation board sandwiched between layers of laminated foil, the Therma-Dome is a quality engineered product designed to last as long as your home. It’s cellular foam core gasket provides a continuous seal and stops costly energy drain caused by air leakage.

Specified and used in many weatherization and energy conservation programs nationwide, the use of a Therma-Dome cover can help to conserve enough heating and cooling energy to pay for itself in just one year.

Therma-Dome Pull-Down Attic Stair Cover Overview

Therma-Dome Assembly and Installation

Maximize-R - R-40 or More

As seen on:


  • Insulation R-Value: 13
  • Inside Dimensions: 27”W x 60”L x 10 ½”H
  • Outside Dimensions: 30”W x 62”L x 12”H
  • Actual Carton Weight: 12lbs.

The Therma-Dome Pull Down Attic Stair Cover comes in an easily assembled kit, which includes six lap joint components, a tube of adhesive, foil tape, and step-by-step instructions. Equipped with only a caulking gun, scissors, and a hammer, you can assemble and install this money-saving stair cover in approximately fifteen minutes.

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