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Model #TC-5425

Store SKU #1001556324

25 in. x 54 in. Attic Stair Cover in Double Reflective Insulation with Adjustable Straps and Zipper Opening

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  • Easy-open zipper enables convenient accessibility
  • Made from poly-filled aluminum-coated polyester for durable use
  • Double reflective insulation cover for attic stairway
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$9900
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Product Overview

ThermoClimb Adjustable Attic Stairway Insulator will keep hot air and air-conditioned air where you want it. An average attic will lose up to 27% of its total insulating properties without insulating the 10 sq. ft. of space over your attic door. An attic stairway cover or attic tent, such as ThermoClimb, will significantly increase your overall attic thermal insulation properties.
  • Measure your attic stairway frame, get the size you need (25 in. W x 54 in. L for this model), adjustable stair depths up to 13 in.
  • No assembly required, simply staple to attic stair frame, use sealant and adjustable straps
  • Easy open zipper feature
  • Made from heavy-duty poly-filled aluminum coated polyester woven fabric
  • 3.8-R factor
  • Unique adjustable straps for up to 54 in. long and up to 25 in. wide attic openings (13 in. depth)
  • Just staple and seal around bottom for ultimate air-tight seal
  • Priced well below other attic tents with lesser insulating properties
  • Click here to learn more about Eco Options and Energy Efficiency
  • How much do you need? Let our calculator help:
    Insulation calculator button

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Attic Stairs Insulation Cover - 25 in. x 54 in. x 11 in. - R-Value of 14.5, Fireproof Attic Stairway Insulator
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25 in. x 54 in. Attic Stair Cover in Double Reflective Insulation with Adjustable Straps and Zipper Opening
22 in. x 54 in. Attic Stair Cover in Double Reflective Insulation with Adjustable Straps and Zipper Opening25 in. x 59 in. Attic Stair Cover in Double Reflective Insulation with Adjustable Straps and Zipper Opening
BrandWhistlerThermoClimbThermoClimbThermoClimb
NameAttic Stairs Insulation Cover - 25 in. x 54 in. x 11 in. - R-Value of 14.5, Fireproof Attic Stairway Insulator25 in. x 54 in. Attic Stair Cover in Double Reflective Insulation with Adjustable Straps and Zipper Opening22 in. x 54 in. Attic Stair Cover in Double Reflective Insulation with Adjustable Straps and Zipper Opening25 in. x 59 in. Attic Stair Cover in Double Reflective Insulation with Adjustable Straps and Zipper Opening
Price
$5772
/box
$9900
$9900
$14340
Ratings
(27)
(123)
(123)
(123)
Product Length (ft.)4.54.5 ft4.5 ft4.92 ft
Product Thickness (in.)0.513 in13 in13 in
Sheet or RollRollSheetSheetSheet
Product Width (in.)2525 in22 in25 in
Insulation R-ValueR14.5R6.6R6.6R6.6
Insulation FeaturesFire Resistant,Pre-CutCondensation Control,Fire Resistant,Formaldehyde Free,Moisture Retardant,Mold Resistant,No-Dust Material,Vapor RetardantCondensation Control,Fire Resistant,Formaldehyde Free,Moisture Retardant,Mold Resistant,Pre-Cut,Vapor RetardantCondensation Control,Fire Resistant,Formaldehyde Free,Moisture Retardant,Mold Resistant,Vapor Retardant
Compatible Install SurfaceExisting Insulation,Plywood,WoodExisting Drywall,Plywood,WoodExisting Drywall,Existing Insulation,WoodExisting Drywall,Plywood,Wood
View ProductView ProductView ProductView Product

Specifications

Dimensions

Cover Area Per Bag (sq. ft.)
9 ft²
Coverage Area (sq. ft.)
9 ft²
Product Length (ft.)
4.5 ft
Product Thickness (in.)
13 in
Product Width (in.)
25 in

Details

Compatible Install Surface
Existing Drywall,Plywood,Wood
Install Temperature (F)
0-120
Insulation Features
Condensation Control,Fire Resistant,Formaldehyde Free,Moisture Retardant,Mold Resistant,No-Dust Material,Vapor Retardant
Insulation R-Value
R6.6
Insulation Type
Accessory
Product Weight (lb.)
4
Returnable
90-Day
Sheet or Roll
Sheet

Warranty / Certifications

Warranty Information
10 year warranty replacement for manufacturer defects.

Questions & Answers

Typical questions asked about products:

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Customer Reviews

  • 4.3
    out of 123 reviews
  • 92% recommend this product
Filter by:
Showing 1-10 of 123 reviews
The ThermoClimb worked as advertised. Fit the stairwell with no adjustments. Can feel the diff...
The ThermoClimb worked as advertised. Fit the stairwell with no adjustments. Can feel the difference in the house temperature immediately. I highly recommend this product.
by IrenePA
1 person found this helpful
To install this cover, I built a simple wood curb projecting upward from the stairway frame about...
To install this cover, I built a simple wood curb projecting upward from the stairway frame about eight inches into the attic opening. This curb was sized to provide the necessary clearance above the folded stairway mechanism and something tangible to support the cover and attach it to. It was attached to the stairway frame with mending plates and screws. The installation was easy to work out and the thermal effectiveness of the cover is very good. The temperature differential between the attic space and space inside the closed cover runs around twenty to twenty five degrees.
by LARRY
4 people found this helpful
Good product, but have to build a frame around it as it does not hold itself up. Recommended usin...
Good product, but have to build a frame around it as it does not hold itself up. Recommended using staples to attach it to the frame. If you use screws, put them through the area the zipper is sewn to.
by bigdougdog
I love this product. One thing they don't tell you is that you gonna need double sided tape or up...
I love this product. One thing they don't tell you is that you gonna need double sided tape or upholstery nails to attach the "tent". Other than that I think this product is going to save me some money on electic bill.
by MaggieG
3 people found this helpful
After reading all of the reviews, this was an 'easy' choice to make. I could tell how well this ...
After reading all of the reviews, this was an 'easy' choice to make. I could tell how well this was working as it was being installed, I could feel my own body heat reflected back of the inside as I was supporting the attic cover whilst it was being stapled down to the attic ladder framework. i thought it might need some additional sealing at the corners but absolutely not needed, it is Winter here now and I cannot detect any drafts or 'cold spots' when I checked in sub-zero temps. - I am VERY glad I made this purchase before I had the attic ladder installed, and it looks like it will last a lifetime!
by Sporges
3 people found this helpful
Quick solution to drafty attic stairs
After dealing with ice dams last winter, I figured out that the attic stairs were a big source of heat loss into the attic. This insulating kit looks to fix that. It installed easily in 30 minutes.
by Jack61
5 people found this helpful
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
My attic stair doorway appears to close all the way but really does not stop warm air from gettin...
My attic stair doorway appears to close all the way but really does not stop warm air from getting thru because of a small gap. The stair springs do not pull up tight enough. Installing this properly in the attic will make a difference. After installing I had an opening on each side where the straps are installed to tighten the cover so I just used industrial duct tape. Dont use the cheap stuff as it will peel off. I also had to build a lip around the attic opening with 2 by 2's to fit the cover onto because mine was flush and this needs to slip over a lip so you can fasten/staple it on. These used to be around $150 a few years ago so now that it is $100 I bought it. Feels durable enough. Just wish there were 2 zippers as pulling 1 all the way around can be troublesome for short people as you will have to reach out over the end with no stairs. I would buy it again.
by Skeer
It’s very well made & works great....
It’s very well made & works great.
by KIRK
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
Showing 1-10 of 123 reviews