In-Floor Heating for Concrete Slab Floors


Are you considering installing heated concrete floors in your home? Even if you aren't building a new home, perhaps you're thinking about adding a sunroom or garage to your house. If you want to enjoy your sunroom in all four seasons, or comfortably enjoy the beauty of a trendy new polished, stamped or stained concrete floor, you'll appreciate radiant heating under foot.


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Floor Heating Systems for Concrete Slab Floors

With WarmlyYours' concrete heating cables and mats, you can design your concrete floors to be as warm and functional as they are attractive.

Slab Heat Cable Heating System Banner

Our most popular cut-and-turn roll for easy installation.


  • 10 Year Warranty
  • $8 - $16 per sq. ft.
  • 20 Watts per sq. ft.
  • Available in 120/240 VAC
Slab Heating Mat Heating System Banner

Targeted heat coverage designed for small areas.


  • 10 Year Warranty
  • $10 - $12 per sq. ft.
  • 20 Watts per sq. ft.
  • Available in 120/240 VAC
Request a Free SmartPlan!

Provide us with a sketch of your room that includes dimensions and other relevant information and you’ll receive a free SmartPlan within one business day.


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Roof & Gutter Deicing Systems avoid costly damage and prevent trapped water in your home.

Why Install Radiant Floor Heating?

Electric in-floor heating systems generate an even heat throughout your home and will not disturb dust, reducing the chance of possible allergic reactions. What's more, radiant heated floors reduce noise levels and the amount of dry air in your home. There are other benefits to floor heating as well, including financial perks, as they are inexpensive to install and typically don't add more than a quarter to electric bills.

  • Easy to Install Whether you’re using a mat or cable, we've made installation as simple as possible.
  • Affordable Most systems are inexpensive to run and require no regular maintenance.
  • Easy-to-Use Thermostats The secret to any great heating system is a great control.
  • Saves Energy Radiant heat has higher levels of energy efficiency than most traditional systems.
  • Safe cULus listed.
  • Clean Heat Doesn't disturb pollen, dust or other allergens like forced-air systems.

Why Choose WarmlyYours?

WarmlyYours provides free design services to make sure that customers purchase the heating system that best meets their project requirements. Depending on the floor type and the shape and size of a room's layout, the size and placement of heating mats will differ.

  • Free Installation Plan We provide a free, no-obligation SmartPlan™ with every quote, often within 1 day.
  • 24/7 Installation Support We're here to answer your questions every day – year round – round the clock.
  • Easy-to-Use Thermostats The secret to any great heating system is a great control.
  • Fast Shipping & Simple Returns With same day shipping nationwide, we're committed to getting your order to you on time. Plus, we don't charge restocking fees for unused products.
  • Unbeatable Warranty All of our heating systems are backed by our industry leading warranty, with coverage for both labor and materials on most installations.

Frequently Asked Questions


How do I work with my electrician to install WarmlyYours electric floor heating?

While WarmlyYours electric radiant floor heating systems are typically installed by your floor covering contractor, a licensed electrician is recommended for the final thermostat hook-up. With every quote, we provide an Installation Plan layout, together with an electrical plan that has all the info required for the electrician.

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How can I determine what I need for my floor heating project and how can I find out what my floor heating system will cost?

You can use the Instant Quote Tool, which gives you many options for your floor heating coverage. Use this interactive tool to design your room online and receive an instant quotation with product recommendations, rough-in and installation kits, cost of your control, etc. Planning your floor heating project is made easy when using our Instant Quote Tool.

Send us your floor plan or fax it to (800) 408-1100 and we will send you a quote, product recommendation and a free custom installation plan for your project.

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Is electric floor heating safe and what about EMF?

Our electric radiant floor heating systems have withstood rigorous safety testing and earned the UL listing. They produce much less EMF than common household appliances like your TV or vacuum cleaner. The EPRI (Electric Power Research Institute) tests all electrical devices and publishes the data. Many common household appliances are tested at a distance of 6 inches. The test results indicate that on average, the EMF emitted for the following appliances, measured in Milligauss (mG) units, is:

Vacuum Cleaner: 300 mG

Microwave: 200 mG

Portable Heater: 100 mG

Dishwasher: 20 mG

Washing Machine: 20 mG

WarmlyYours TempZone™ (Twin): 1.8 mG

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How do you keep a sunroom warm in the winter?

Sunrooms can be very cold during the winter months. While a furnace may push some warm air into the room, the large number of windows, exterior walls, and other causes of heat loss in a sunroom will typically keep it from having a comfortable temperature level. Floor heating and radiant panels will add radiant heat, which the human body absorbs faster than other forms of heat, to the room so that it feels warm even at lower temperatures.

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If I have extra cold lead wire, can I trim off what I don't need for my installation?

Yes. Unlike the heating cable for electric floor heating, the cold lead wires can be trimmed or lengthened with additional lead wire which can be purchased from WarmlyYours.

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Can I heat luxury vinyl tile/planks in the kitchen?

Yes, our TempZone Heating Products can be used for heating luxury vinyl tile or luxury vinyl planks in any indoor application.

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What is the maximum temperature for Luxury Vinyl Tile (LVT) when it comes to in-floor heating?

This is stated in the Installation Manual of the LVT product when purchased. On average, this maximum temperature will fall between 80°F and 83°F. This number can then be used to program the thermostat during setup to set the floor's maximum temperature.

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Should I add insulation before installing electric floor heating and how will that affect the system's performance?

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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Can you heat under the appliances, fixtures, or furniture in a laundry room, mudroom, or utility room?

No, it is recommended that floor heating only be installed in the areas that you will walk on. Heat can become trapped if installed under objects that do not offer enough clearance for air to circulate (such as a washer or dryer).

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How will electric floor heating affect my wood floor?

WarmlyYours nSpiration controls are equipped with an in-floor sensor to precisely control the floor's temperature to comply with the wood manufacturer's temperature recommendation.

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Can the floor heating be set to turn on at certain times when we know we will use those areas and need heating?

Yes, with our programmable thermostats, you can choose which days and times the floor heating turns on for your comfort. With a Smart thermostat, you can also control these options from your phone while away from home.

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What is the total power/amperage that the electric floor heating system draws and does this system need a dedicated circuit?

The amount of amperage draw depends upon how large the area is that you are heating. For coverage of areas less than 30 square feet, the system will draw less than 3 or 4 amps. If you have a larger area over 120 square feet of heated space, then you may need a larger breaker plus additional controls. No matter what the size of the area you choose to heat, we recommend a dedicated circuit for your electric radiant floor heating system.

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Can I put furniture on top of underfloor heating?

Yes, but any furniture that may trap heat, such as pieces with an enclosed bottom, should be avoided. Furniture on legs with a clearance of at least 3" is permissible.

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Which LVT, WPC or Solid Core product can be paired with radiant heating? Is there a list of manufacturers who still provide a warranty when pairing with radiant floor heating?

LVT (Luxury Vinyl Tile), WPC (Wood Plastic Composite), and Solid Core all fall into the category of "vinyl flooring." These flooring types can be rated for floor heating, but will completely depend on the manufacturer's guidelines.
Please look in the installation manual and warranty documents of the product you're interested in to see if and what types of heating are allowed.

As for a list of manufacturers - many do provide a warranty for their products when properly installed with floor heating. The list of these is ever-changing, so please be sure to check with the flooring manufacturer for current recommendations.

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Will the radiant heat affect the attached rubber or cork backing on Luxury Vinyl Tile? Does the attached backing have any effect on the floor heating system?

Since most Luxury Vinyl Tile (LVT) manufacturer's set a maximum temperature for radiant floor heating, the system should have little to no effect on the rubber/cork backing.

Pre-attached backing can act as an insulating layer though, meaning it can prevent the radiant heating from efficiently directing heat up through the floor. Please check with the manufacturer for the r-value of the product. Look for an assembled plank with an r-value of less than 1. The lower the r-value, the better!

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Can I put electric floor heating in the shower?

Yes, we have TempZone Shower and Bench mats with sizes designed specifically for shower installation and they are wet location listed for for installing electric radiant floor heating to a shower.

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Would the installation process be different if Luxury Vinyl Tile was installed in a bathroom?

No. A bathroom floor would be installed in the same way. Our TempZone floor heating systems are wet-location listed and ideal for bathroom floors.

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How effective are radiant electric floor under 3/4" wood flooring?

For best results, we recommend a 1”- 1.5” maximum distance between the heating cable and the top of the floor. Nailed down hardwood will require sleepers to run the cable safely between board nails. Be sure to use 3/8" to 3/4" of self-leveling cement to embed the heating element.

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Does the heat cause any shrinkage, expansion, or warping of the vinyl flooring?

If the flooring manufacturer has a warranty for electric floor heating, it should not be adversely affected by shrinkage, expansion, or warping. Again, it will depend on the brand and construction of the product. Some manufacturers may place limitations on the maximum floor heating temperature. To minimize expansion and contraction, some Luxury Vinyl Tile companies require heating the flooring to a continuous heating level with "setback" temperatures (lower temperature settings during the day and overnight) kept to a minimum.

While radiant heating can affect the expansion and contraction of the floor, the most overlooked and important factor is the relative humidity in the space, so a humidifier or dehumidifier may be needed.

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What is the layer order I must install it in?

The layers for the full installation are as follows:

  • Bottom: 8-10" of compressed crushed rock aggregate (may already exist)
  • 2" polystyrene insulation
  • 2-3" layer of concrete
  • Rebar and/or reinforcing mesh and attach the cable or mat
  • Top: Pour a 2-3" layer of concrete as the final flooring surface

Call tech support at (800) 875-5285 to customize this to your unique application.

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How many square feet of floor heating can be connected to one thermostat?

One thermostat can control multiple heating mats/cables as long as all the elements are using less than 15 amps. For TempZone™ Flex Roll systems for example that would be maximum of 120 sq.ft. for 120V systems and 240 sq.ft. for 240V.

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How much additional height will this solution add from the top of the slab to the bottom of the finished floor?

The slab heating cable sits in the middle of concrete pour. Here are the layers for this application from bottom to top:

  • 8-10" of compressed crushed rock aggregate
  • 2" polystyrene insulation
  • 2 - 3" layer of concrete
  • Rebar and/or reinforcing mesh
  • Attach slab heating cable to rebar/mesh
  • Final layer: 2-3" or concrete as final flooring surface
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What should I consider if I want to heat a vinyl or composite material floor?

We recommend verifying 3 things with the manufacturer of the flooring product to be heated;

1.) Is the flooring product compatible with electric floor heating?

2.) What is the maximum temperature the flooring product can withstand?

3.) What is the temperature set back recommendation of the flooring product?

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Where do you install the slab heating cable?

You should install the cable 2-3" below the finished surface, and attach it to rebar and/or reinforcing wire mesh to secure the cable in place.

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Can I have one thermostat for my open floor kitchen, dining room and living room?

We usually recommend that you have an individual thermostat for each room. However, if it's an open floor plan and your local electrical code allows you to have one controller for the whole area, then it's definitely possible to have it all controlled from one thermostat.

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How do I test the Slab Heat cable or mat?

Test the product using a digital ohm meter as shown here. Also test the slab heating product using a Mega Ohm meter as shown here. And this video shows how to do the Ohm test.

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What temperature is best to set the floor to?

82°F - 85°F is the most common comfortable warm temperature of the floor.

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Who is qualified to install the cables or mat?

Any trade professional is qualified to layout cables and/or mats; electricians must make the electrical connections and test the wire; you can hire a concrete contractor to install the concrete for you.

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How quickly can I get the slab heat cables/mat after I order?

In-stock items will ship the same day if you place your order before 4:00 PM CST.

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What are the power requirements?

The requirements are: 20 watts per square foot foot (with 3" spacing) without a floor covering; or 15 watts per square foot (with 5" spacing of cable only) with a floor covering. To calculate your exact power requirements, multiply the square feet by 20 or 15, as listed above and then divide by the voltage (120V or 240V) to arrive at Amps.

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How is the slab heating system controlled?

You can control your slab heating system with any WarmlyYours nSpiration Series thermostat. Depending on the size of your project, you may also need to add a relay or nJoin power module.

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What happens if I accidentally cut a wire during the installation?

Stop installation, box out a 3"×3" area surrounding the damaged area and call tech support at (800) 875-5285.

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Is installing a floor heating system for LVT the same as for ceramic or porcelain tile?

Yes, Luxury Vinyl Tile (LVT) is typically installed over the embedded heating element using self-leveling cement (SLC). Many people choose to use SLC when installing tile over floor heating.

We do not suggest using thinset to encase the heating wires with LVT, as it is very difficult to get thinset completely flat.

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Can this floor heating be used under an existing hardwood floor?

No, most in-floor heating is designed to be added to new flooring. If you do have existing wood floors you would like to add radiant heating to - it is possible to do so with an under-joist heating system. 

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What is your cost per square foot for the material?

The cost for material per square foot is approximately $10.00-15.00 per square foot.

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What is a good choice, or watt density, for supplemental heat?

Supplemental heat can be addressed by changing the spacing on cable installs. Floor location in the house is very important when considering adding supplemental heating to a floor. For example: If heating a second story floor, over a heated space, cable at 4" spacing can be used. The same type of heating over an unheated space would probably be done with TempZone Flex Rolls or TempZone Cable at 3" spacing. All heating is considered supplemental unless a heat loss calculation is done.

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Can you use glue-down Luxury Vinyl Tile products with this floor heating system?

Yes, if the flooring manufacturer recommends this installation method. In most cases, the heating element will still need to be embedded in self-leveling cement before the flooring is installed.

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Is there a way to heat vinyl flooring without embedding the heating system, such as a floating floor heating system?

There are heating systems designed for floating floors, such as our Environ system. However, the flooring must be rigid enough so it does not mold itself to the heating cables over time.

Check the flooring manufacturer's floor heating recommendations. In most cases, the heating system will need to be embedded beneath the flooring. Check for all "flatness" requirements for the flooring you choose. The flattest floors utilize self-leveling cement when installed correctly.

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What is the recommended temperature for a heated kitchen floor?

Everyone has their own comfortable temperature setting, but we typically find that our customers use their thermostats to set the "floor temperature" of the system in the 78°F - 84°F range.

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Can you use a sunroom in the winter?

Yes, sunrooms can be used in the winter, just activate your floor heating or radiant panel and turn your sunroom into a 4-season room. You will notice a tremendous difference in the room comfort, especially with the thermostat set to maintain a desired ambient temperature. WarmlyYours thermostats will do the work for you by energizing the floor for longer cycles.

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Can the floor be waterproofed and still have floor heating?

Yes, we offer several options to help make your floor heating system water resistant or waterproof. Our TempZone product line is designed for wet areas - making it completely safe for rooms that will have water on the floor at times or may experience leaks or flooding. We also offer waterproofing bands for our TempZone Cable + Prodeso Uncoupling Membrane system. Allowing you to waterproof all seams and the perimeters of the wall - guaranteeing that your floor heating system stays safe and prevents water from leaking to areas below.

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Do radiant heating products have polarity?

Electric-resistance heating cables and systems have no polarity. This includes all current WarmlyYours heating elements.

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How can I make my room warmer without a heater?

Floor heating will typically add the most heat to supplement an existing heating source and it will not take any extra space since it is embedded in the floor. If you are not remodeling your floors but have some open wall space, you should mount a radiant panel. For the most effective results, install the panel so that it points toward the area where you will spend most of the time.

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