Attic Stair Cover Insulating and Magnetically Sealing Your Pull-down Stairs

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Price: $134.95    

Product Feature

• The Thermalid II magnetically seals the Attic Pull-down Stairway, saving you money.
• The Thermalid II is a "Energystar" product.
• The Thermalid II provides an R-9 rating with its 2 1/4" thick material.
• The Thermalid II Inside Measurements 56"L x 28"W x 8.875"H
• The Thermalid II is professionally designed with the highest grade material.

Product Description

Thermalid II is a unique product that is installed over your attic stairs. This product provides an R-9 insulation value and has a magnetic gasket that seals the homeowners conditioned air (warmed in winter and cooled in summer) in their home. This magnetic seal is the same type gasket that you have on your refrigerator. Stopping the air from moving in and out of your house through the attic stair opening saves the homeowner money by reducing their utility bill. Without a seal the air simply goes around anything you use no matter the R-value. (Tech talk: The differential pressure in the home and the attic changes all the time due to heat/cooling of the attic, barometric pressure, wind velocity outside the home, etc... so the R-value is not as important as sealing the attic opening.) The Thermalid II seals the entire opening not just the stair frame. Outside measurements 32"x 60"x 11". The attic cover is magnetically sealed with a gasket and four metal strips that are caulked to the attic floor (use any type Latex caulk, not supplied). These strips are provided and are 1/16" thick and 1" wide and are cut to length. This allows the Thermalid II to be easily removed out of the way when entering the attic with nothing to trip over or climb through. The Thermalid II is made of 2 1/4" thick expanded poly-styrene and comes in two pieces for lower shipping cost. The two pieces are connected together by a special "lap joint" created when the product is professionally manufactured. Installing the Thermalid II will take 15- 30 minutes. Stopping air movement requires more than setting a product on top of the stairs. Thermalid II fits both 22" x 54" and 25" x 54" openings. Homeowners should measure the height stairs extend above the floor of attic when closed to ensure proper clearance. We believe that the Thermalid II provides the homeowner the best product to stop drafts through your attic stairs for the money. Thermalid Inc has been in this business since 1999.

Attic Stair Cover Insulating and Magnetically Sealing Your Pull-down Stairs Review

I chose this stair cover over others because of the magnetic seal. The product works as advertised. My attic stairs fit under it. The magnetic seal seems to work well. Just be warned that installation was a real pain for me.

First off, the instructions could use a spell checker and possibly a higher quality printer. But they were understandable. They say that installation should take about half and hour and you will need one to two tubes of caulk. Installation took me 2.5 hours, 3 tubes of caulk, a roll of caulk saver, and some plywood. My attic flooring needed some plywood in the back before I could even begin and I caulked all the gaps and chinks in the woodwork around the stairs. I really wish that I had sanded the floor level before installation. The plywood floor in my attic has as much as an 1/8" height difference between the different pieces of plywood. The magnetic seal does not bend over these gaps seamlessly. I did the best I could adding extra caulking under the metal strips, but the strips bend slightly and the magnet isn't strong enough for that. In hindsight, I should have sanded the floor smooth first, I wish the instructions had suggested that.

The foam cover comes in two pieces for easy shipping that have to be caulked together. It also has four holes near the corners that need to be filled with caulk. The holes mystify me. I'm not sure why there are there to begin with, but I really wish they had been factory filled. Filling those holes was the messiest part of the job for me because the caulk dripped out the bottom.

The magnetic seal is similar to a fridge door. There is a rubber gasket like around the fridge door that magnetically seals to the metal strips that get caulked to the attic floor. Unlike the fridge door, there is no hinge. Every time you leave the attic you will need to ensure that the cover is exactly aligned over the metal strips. Its a bit finicky and may add an extra 20 seconds to every one of your attic trips to get the cover sealed properly when you come back down. A better design would probably have a hinge one one side of the cover so that it closes more easily. But then again that would be more expensive, harder to install, and wouldn't allow the cover to be moved aside when bringing up bulky items.

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