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Cork Over Radiant Heat



Can I install cork over  Radiant heated floors?

Yes, cork can be applied over radiant heat using two different installation methods. When doing so the radiant surface temperatures should never exceed 82 degrees. Some cork product may have a lower temperature recommendation. Always review the products installation instructions. The system should be running for at least 1 week. Then bring the flooring into the work area to acclimate 3-5 days before installation. See our "FLOORING 101" for related acclimation and radiant information.

Here are two basic methods for installing cork flooring over radiant subfloors

CORK TILES *glue-down                                                     

Cork tile flooring should be adhered directly to the plywood or concrete subfloor using the Bostik Vinyl-Grip 99Remove any surface sealers and contaminates that could cause a bond failure with the adhesive. The subfloor must be dry before installation can proceed.

Floating Cork

Floating cork products are also excellent for radiant heat installations and are designed with freedom to expand as a unit. These products are manufactured with a man made (HDF) High Density Fiber core and cork is applied on the top and bottom. The advantage of this type of cork floor is that it requires no adhesives or nails for proper installation and allows the homeowner flexibility if they ever decide to change the floor covering. When covering cement slabs (on-grade or below-grade) use 6-8mil polyethylene sheeting as a moisture barrier, omit this poly sheeting when covering wood sub-floors. Floating corks are installed without underlayment. However, if using a pad underlayment best practice is to use a dense type pad such as; Bellawood Premium underlayment, Bellawood Platinum, Eco Silent Sound HD, or 1/4" cork underlayment rather than a foamy pad. Cork seams need supporting.


Technical and Installation   4/2019