CeraZorb® Insulating Synthetic Cork Underlayment (2’ x 2’) - 48 sq.ft. - Pack of 12 Sheets
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Most of the installation — laying out the heating element, placing the floor sensor, and pouring self-leveling cement — can be completed as a DIY project by a competent homeowner. However, the final thermostat wiring connection must be completed by a licensed electrician in most jurisdictions.
WarmlyYours makes DIY installation easier with:
- SmartPlan® — a free custom layout service that maps out your exact cable placement, sensor location, and electrical requirements
- Circuit Check — a monitoring device that alerts you if the heating cable is damaged during installation
- 24/7 technical support — available throughout your installation
Always check local electrical codes before beginning any floor heating installation.
Yes — insulating underlayment is strongly recommended when installing electric radiant floor heating over a concrete basement slab. Without it, a significant portion of the heat will conduct downward into the cold concrete rather than upward through the floor surface where you want it.
WarmlyYours recommends ThermalSheet® insulating underlayment for basement slab installations. It improves system efficiency, reduces operating costs, and helps the floor reach target temperature faster.
Skipping underlayment on a basement slab is one of the most common — and most costly — installation mistakes.
Operating costs for electric radiant floor heating in a basement depend on your local electricity rate, the size of the heated area, and how many hours per day the system runs.
As a real-world example, a finished basement playroom in Whitchurch-Stouffville, Ontario cost approximately $0.19 CAD per hour to operate — significantly less than running a portable electric space heater, and with whole-floor comfort rather than point-source heat.
In the US, typical operating costs range from $0.01–$0.15 USD per hour depending on system size and local electricity rates. Use the WarmlyYours Operating Cost Calculator to estimate your specific project.
Electric radiant floor heating can serve as a primary heat source in a well-insulated basement, particularly for finished basement spaces used as living areas, playrooms, or home offices.
Unlike forced air systems, radiant heat warms objects and people from the floor up — which is especially effective in basements where cold radiates upward from the concrete slab. This makes it a more efficient and comfortable option than forced air in below-grade spaces.
For larger or poorly insulated basements, a heat loss calculation (available free through WarmlyYours SmartPlan®) will confirm whether the system can meet the full heating load or whether it should supplement an existing system.
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Insulation Specification (CZRG-SH6MM-48X48)
| Acoustic testing on 6" slab, no ceiling | IIC 52 wood construction. FIIC 59 - 7.5" concrete slab. ΔIIC 20 - 6" concrete slab |
| Compressive Strength | 34 psi @ 10% Deformation |
| Material | Hemi-crystalline Thermoplastic |
| Thermal Insulation | 1.5 R-Value |
Product Dimensions (CZRG-SH6MM-48X48)
| Coverage | 16 ft² |
| Depth | 0.2362″ |
| Length | 24″ |
| Weight | 0.8 lbs |
| Width | 24″ |
Identifiers (CZRG-SH6MM-48X48)
| SKU | CZRG-SH6MM-48X48 |
| UPC (GTIN-12) | 881308069971 |
Warranty / Certifications (CZRG-SH6MM-48X48)
| TCNA Robinson test | Light Commercial |
| Warranty | 5 years |
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