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CeraZorb® Insulating Synthetic Cork Underlayment (4' x 4') - Pack of 25 Sheets

15 Reviews

CeraZorb® Insulating Synthetic Cork Underlayment (4' x 4') - Pack of 25 Sheets

15 Reviews

CeraZorb is a synthetic cork underlayment that is installed on top of a subfloor and below a heating element. It is recommended when installing an electric floor heating system over a concrete slab to prevent heat loss. By creating a thermal break, the heat is prevented from sinking into the concrete, and more heat radiates into the floor covering and room. In addition to preventing unnecessary heat loss, CeraZorb provides sound dampening benefits and double the crack isolation benefits when compared to cork.

CeraZorb is lightweight—up to 25 times lighter than traditional 1/4" backer board. It is available in 2’ x 4’ and 4’ x 4’ sheets, and in packs of up to 100. CeraZorb is a 5 mm. (roughly 3/16 in.) thick, synthetic cork underlayment system that is specifically designed for setting tile and stone and is an excellent insulation choice under our TempZone™ electric radiant floor-heating product. It’s a very resilient underlayment with compressive strength of 34 psi at 10% deformation. 

Twenty-five 4’ x 4’ sheets provides 400 sq. ft. of coverage and is great for medium sized projects. Typically ships in 1 box.



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Customer Reviews

TempZone™ Flex Rolls achieved an average rating of 5.0 stars with 15 reviews by our customers.

Top Customer Reviews

Great product

Great product, would highly recommend if you are putting a heated floor over a concrete basement floor. They are pricey though if you need a lot.

Tim Oconnor, BELLEVILLE, IL on 02/03/2017

Great Protection and Resistance

This product was easy to install and added great protection and resistance between the slab an the heated floor.

Mike Thalheimer, Fishers, IN on 01/08/2017

Amazing!

This product is great. My radiant flooring grid would not have worked AT ALL if I hadn't used your CeraZorb mats. I tested the insulation properties by standing barefoot on my cold concrete floor. Then I stood on your product & the difference was AMAZING. I felt absolutely NONE of the coldness of the concrete. Thank you for coming up with this underlayment!

Robert D Smith, AVERILL PARK, NY on 04/18/2016

Performed up to all expectations

The synthetic cork Cerazorb product installed easily and provides a great base for the heating mats. \Our installation was over a concrete slab and the Cerazorb allows for quick heating and longer heat retention. It has performed up to all expectations. I would recommend it to anyone installing basement floor heating.

John E Opilo, Seven Valleys, PA on 02/14/2012

View all customer reviews

Most Recent Reviews

Ron Levorson, Albert Lea, MN on 08/13/2017

Great product

Great product, fast shipping

CNR Group, PASSAIC, NJ on 05/14/2017

Great product

Great product, would highly recommend if you are putting a heated floor over a concrete basement floor. They are pricey though if you need a lot.

Tim Oconnor, BELLEVILLE, IL on 02/03/2017

Great Protection and Resistance

This product was easy to install and added great protection and resistance between the slab an the heated floor.

Mike Thalheimer, Fishers, IN on 01/08/2017

I will be using this system on all future jobs

Great product with exceptional customer service. I will be using this system on all future jobs.

Bruce Augustensen, WOODCLIFF LAKE, NJ on 11/03/2016