How can DIYers install radiant floor heating in a basement bathroom?

With the right tools, guidance, and support, DIYers like Brian Phillips of Mississauga, Ontario, have successfully installed WarmlyYours TempZone™ electric radiant floor heating in their own homes—twice!

Why This Weekend Warrior Chose Radiant Floor Heating

Phillips did his research on electric floor heating systems and chose WarmlyYours for its highly rated products and comprehensive installation support. The fact that the system was available through a trusted retailer like Home Depot helped seal the deal.

“It was a highly recommended product when I read reviews, it seemed easy enough to tackle myself, and it was sold through Home Depot,” Phillips recalled.


He’s not the only one who found the experience smooth and supportive. Another homeowner shared:

“I needed an easy heat source for a small bathroom, and chose in-floor heating from WarmlyYours. I have no experience with in floor heat, so I was very happy with the customer service I received, they were quick to answer my questions and I felt very 'looked after' with my purchase. I'm happy with my purchase, and it has been working great!” – Pam G. | Calgary, AB

Step-by-Step: Installing TempZone™ in a Basement Bathroom

Phillips installed the WarmlyYours TempZone™ system over concrete, following best practices to maximize heating efficiency:

  1. Chose the right product

    He selected a 3 ft. x 8 ft. TempZone™ Mat, which he trimmed and arranged to fit the bathroom layout.

  2. Used a thermal break underlayment

    After consulting WarmlyYours support, he used CeraZorb® synthetic cork underlayment to prevent heat loss into the concrete

  3. Relied on online resources

    He studied the WarmlyYours installation video library and called the Installation Support Team to double-check all materials and steps.

  4. Completed the flooring

    He finished the floor with 12 in. x 12 in. ceramic tile installed over the heating system.

“It went in so easily. I had no issues doing it myself even though I had never done it before. In fact, the longest part was simply the drying time.”

The Benefits of DIY Radiant Floor Heating with WarmlyYours

Phillips appreciated how approachable the entire process was—especially for a hands-on homeowner like himself.

What made the experience successful:

  • Clear product documentation and how-to videos

  • Responsive technical support

  • Guidance on underlayment selection

  • Reliable product delivery and ordering process

“This is a great product, made even better by customer service that went above and beyond to ensure I left a satisfied customer—which of course I am,” Phillips said. “I have been very impressed with WarmlyYours—everything from ordering the product, to the timely delivery, and after-purchase product support. Installation was easy and the heated tile in our basement bathroom is absolutely wonderful.”

Why Underlayment Is Essential for Heated Floors over Concrete

Because Phillips was installing his TempZone™ Mat system over a concrete basement slab, he reached out to the WarmlyYours technical support team to confirm whether an insulating underlayment was necessary.

“I am glad I could confirm everything I needed for the project to ensure its success before ordering. By calling, I found out how important an underlayment was to the success of the heating—helping prevent the cement basement floor from absorbing too much of the heat.

It made a big difference in keeping the warmth where it belongs—under our feet.”


Editor’s Note: While CeraZorb® was the recommended product at the time of Brian’s project, WarmlyYours now recommends ThermalSheet underlayment for slab subfloors. This updated solution offers excellent insulation and moisture resistance for electric radiant heating systems installed over concrete.

How Much Does Radiant Floor Heating Cost to Operate in a Basement Bathroom?

One of the biggest surprises for Brian was how affordable the system is to run—even during Ontario’s coldest months. With a 3’ x 8’ TempZone™ Mat operating at 360 watts, the cost to heat the floor during typical morning use is surprisingly low.

Estimated cost: Only about $0.05/hour based on Hydro One’s off-peak rate of $0.128/kWh in Mississauga, ON.

Because Brian installed an insulating underlayment beneath the system, his heated floor operates more efficiently. The underlayment acts as a thermal break, reducing heat loss into the concrete slab. This improves both energy savings and overall comfort—making underlayment a must for any basement installation.

See the Full Project

Want to explore Brian’s basement bathroom transformation in more detail?

Visit our official Project Showcase to view project photos, room dimensions, product selections, and additional installation insights.

👉 See the full project

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