Cork Underlayment Support
This support page provides publications, manuals, videos, and common support questions for the Cork Underlayment product line.
Main Products (2)
Common Support Questions (4)
Publications and Manuals (2)
Videos (1)
Older Models (1)
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Common Support Questions
When installing electric floor heating over a concrete slab, an insulating underlayment like CeraZorb is highly recommended to ensure efficient operation, faster heating times and warmer floor temperatures.
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CeraZorb is a synthetic cork underlayment, it is made of hemi-crystalline thermoplastic.
Warmly Yours recommends CeraZorb underlayment when installing a floor heating system over a concrete slab to prevent heat loss and protect against moisture. It will not rot, support mold and mildew, or absorb moisture.
- CeraZorb (6mm) has a 1.5 R-value, crack isolation up to 1/4“, reduces sound by up to 22 dB, and is Robinson tested (TCNA) and rated for light commercial loads.
- Cork (6mm) has a .72 R-value, crack isolation up to 1/32“, reduces sound by up to 23 dB, and is Robinson tested (TCNA) and rated for residential loads.
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Yes, unlike natural cork, CeraZorb will not expand under self leveling cement (SLC).
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A decoupling membrane protects the installation from differential expansion/contraction between the substrate and the flooring, relieving almost all shear stresses. Crack isolation protects the installation by isolating the flooring from minor in-plane substrate cracking.
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Publications and Manuals
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