Frequently Asked Questions
Will there be voids (or an air gap) between the insulation and the ground?
No. Unlike traditional, rigid products like foam, Under Slab insulation is flexible and will easily conform to peaks and valleys in the ground. The weight of the concrete will ensure there are no gaps, preventing common problems like cracking in the concrete.
Does this product work well under pex tubing/radiant flooring?
Yes! This product is the ideal insulation for radiant floor heating in driveways, garages, and basements.
Will this product work for radiant flooring on upper levels?
Under Concrete Slab insulation is best for use under concrete—typically basements, garages, driveways, and sidewalks. For wood subfloors on upper levels, it's best to install Between Joist Insulation between the floor joists, or standard Double Bubble Insulation under the floor joists. Learn more about Radiant Floor Insulation here.
Should I tape the seams?
Yes. This is an important part of the installation. Without tape, concrete will leak into the seams and the insulation will no longer form a vapor barrier. We recommend metalized insulation tape for most Under Slab applications, but white insulation tape will work as well.
Should I overlap the product while installing?
No. As long as each panel is joined edge-to-edge, and all seams are taped, it's not necessary to overlap the Under Slab Bubble Insulation. For more information on how to install bubble insulation under concrete, view our Under Concrete Slab application page.
-
Free, Fast Shipping
Shipping and ReturnsAll EcoFoil products ship free. Expedited shipping options are also available.
-
Product Expertise
Contact SupportQuestions about Under Concrete Slab? We're here to help with installation tips, quantity estimation, and bulk pricing.
Shop Bubble Foil Insulation
-
Single Bubble Insulation - White/Foil - 4' X 125' (500 sq ft)
Free Shipping!Regular price $149.00Regular priceUnit price perSold out -
Single Bubble Insulation - Foil/Foil - 4' x 125' (500 sq ft)
Free Shipping!Regular price $149.00Regular priceUnit price per -
Single Bubble Insulation - White/Foil - 6' X 125' (750 sq ft)
Free Shipping!Regular price $299.00Regular priceUnit price per$399.00Sale price $299.00Sale -
Single Bubble Insulation - Foil/Foil - 6' x 125' (750 sq ft)
Free Shipping!Regular price $299.00Regular priceUnit price per$399.00Sale price $299.00Sale -
Double Bubble Insulation - Foil/Foil - 4' x 125' (500 sq ft)
Free Shipping!Regular price $199.00Regular priceUnit price per -
Double Bubble Insulation - White/Foil - 4' X 125' (500 sq ft)
Free Shipping!Regular price $199.00Regular priceUnit price per -
Double Bubble Insulation - White/Foil - 6' X 125' (750 sq ft)
Free Shipping!Regular price $399.00Regular priceUnit price per$469.00Sale price $399.00Sale -
Double Bubble Insulation - Foil/Foil - 6' x 125' (750 sq ft)
Free Shipping!Regular price $399.00Regular priceUnit price per$469.00Sale price $399.00Sale -
Floor Joist Insulation - 16" x 125' (166.63 sq. ft.)
Free Shipping!Regular price $89.00Regular priceUnit price perSold out -
Floor Joist Insulation - 24" x 125' (250 sq. ft.)
Free Shipping!Regular price $129.00Regular priceUnit price per