Therma-Dome Pull-Down Attic Stair Cover

Pull-Down Attic Stair Cover

Each Kit Includes

  • Foil-Faced Fire-Rated Foam Panels
  • Integrated gasket and straps
  • Construction Adhesive
  • Foil Tape
  • Nail-in Anchors
  • Step-by-Step Instruction Sheet


Pull-down attic stairs offer the wonderful convenience of being able to use overhead space for storage. However, the “hole” that is created in your home’s insulation to allow this access comes with s significant price tag, in terms of home comfort and heating and cooling costs. In the winter, the stairs offer little in the way of insulation to retain home heat, and let cold drafts into your living space. In the summer, home cooling money is lost as heated attic air pours into your living space.

The Therma-Dome Pull-Down Attic Stair Cover was first developed in 1991, and it remains the only pull-down attic stair insulating product on the market that also provides an effective and durable air seal. To ensure a complete air seal, the continuous exterior-grade weatherstrip gasket works in conjunction with Velcro straps. The exposed-use foil-faced polyisocyanurate foam insulation achieves an effective insulation value of R-13. The Therma-Dome cover is lightweight, and easily moved aside for completely unobstructed access to the attic area.

The Therma-Dome Pull-Down Attic Stair Cover is designed to air seal and insulate your attic access opening, blocking the escape of home heating dollars in the winter and providing greater comfort and reduced cooling costs during the summer.

Constructed of fire-rated (exposed-use) polyisocyanurate foam insulation board that is sandwiched between layers of laminated foil, this Therma-Dome product is designed to last as long as your home. The exterior-grade cellular foam core weatherstrip gasket provides a continuous air seal, even across slight inconsistencies in the attic floor, stopping costly energy drain.

Therma-Dome covers have been specified and used in many state, community, and utility energy conservation programs nation-wide. These codes require the components of the cover assembly to be constructed of rigid panels that are joined together with adhesive and the seams sealed with foil tape. The Therma-Dome kit is the only stair cover kit available that includes both the adhesive and the foil tape.

The use of a Therma-Dome cover can help conserve enough energy to pay for itself in just one year. (Energy cost savings may vary, depending on utility rates in your area.) The Therma-Dome cover is constructed of fire-rated material, meeting the most stringent state and local building code requirements.

The Therma-Dome Attic Stair Cover comes as 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 as little as fifteen minutes.

Product Specifications

Insulation Value


Inside Dimensions

27″ Wide x 59½” Long x 10¼” High

Outside Dimensions

30″ Wide x 61½” Long x 11¾” High


7½ lbs.

Carton Weight

11 lbs.

Tools Required

Hammer, Caulk Gun, Knife or Scissors

Made in USA