Heated Concrete Floors
Electric radiant heating for polished, stamped, or stained concrete slab floors. Whether you're finishing a basement, building a garage, or pouring a new slab—heated concrete floors deliver silent, even warmth right where you need it.
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Why Install Heated Concrete Floors?
Concrete is one of the best materials for radiant floor heating. Its thermal mass absorbs and stores heat, then releases it slowly and evenly—making heated concrete slab floors remarkably efficient.
Primary Heat for Basements & Garages
Slab heating delivers 15 watts per square foot—enough to serve as the sole heat source for basements, garages, and sunrooms with no ductwork required.
Works with Any Concrete Finish
Compatible with polished concrete, stamped concrete, stained, acid-washed, and epoxy-coated floors. Your finish stays beautiful; the heat stays hidden.
Purpose-Built for New Concrete
Slab Heat cables embed directly in a new concrete pour—ideal for basements, garages, and additions. Already have a slab? See our floor heating systems for above-slab installations.
Energy Efficient
Concrete's thermal mass stores heat and releases it slowly, reducing energy waste. Radiant heat warms objects directly—not the air—so less energy is lost.
Silent & Maintenance-Free
No moving parts, no noise, no annual servicing. Once installed, heated concrete floors last the lifetime of your flooring.
Affordable to Operate
A typical heated concrete floor zone costs just $0.07–$0.36 per hour to run. Use our calculator below to estimate your cost.
Concrete Floor Heating Customer Reviews
We take pride in providing both exceptional service and great products. But don't just take our word for it, check out what some of our customers have had to say.
Heated Concrete Floor Projects
See how real homeowners and builders heated their concrete floors with radiant heating—including costs and installation details.
How Much Does a Heated Concrete Floor Cost?
The cost of a heated concrete floor depends on which heating system you choose and the size of the area. Slab heating mats typically range from $7–$11 per square foot, while slab heating cables with fixing strips cost around $4–$8 per square foot. Cables offer more layout flexibility for irregularly shaped rooms; mats cover large rectangular areas quickly.
For a typical 200 square foot basement zone with about 150 heated square feet, expect to spend between $600 and $1,650 on heating materials. Add a programmable thermostat ($100–$250) and you have a complete system. Operating costs are minimal—often under $1 per day for a single zone at average electricity rates.
Slab heating is especially cost-effective in new construction where cables are embedded directly in the concrete pour. If you're adding heat to an existing concrete floor with a finished floor covering on top, that's a different type of installation—see our floor heating systems for those projects.
Operating Cost Calculator for Floor Heating
Estimate your daily and monthly energy costs based on room size and local rates.
ft²
¢/kWh
Estimated Cost
$0.14
per hour
$0.57
per day
$17.10
per month
Free SmartPlan
Get a custom installation plan for your concrete floor in just 1 business day.
"I'll create a custom installation layout showing exactly where your heating elements go, plus a complete materials list with pricing."
Heating Systems for Concrete Slab Floors
WarmlyYours Slab Heat mats and cables are designed specifically for embedding in concrete. Available in cable form for maximum flexibility or mat form for quick, easy installation—both deliver even, reliable warmth under polished, stamped, or stained concrete floors.
Warmth for Concrete Floors — Mat Form
With concrete heating mats, you can design your concrete floors to be as warm and functional as they are attractive. Radiant heating in mat form allows for quick and easy installation under concrete slab floors.
Features
- Cut‑and‑turn mats speed up slab installations
- Ideal for basements, garages, and sunrooms
- Even, reliable heat embedded in the concrete
- 10 Year Warranty
- Our systems are cUlus listed, Gfci protected and RoHs Compliant
Warmth for Concrete Floors
With concrete heating cables, you can design your concrete floors to be as warm and functional as they are attractive. Radiant heating cables offer maximum flexibility for installation under concrete slab floors.
Features
- Embedded directly into new concrete pours
- Ideal for basements, garages, and sunrooms
- Long-lasting radiant heat built into the slab
- 10 Year Warranty
- 15-20 Watts Per Sq. Ft
Common applications:
Basement
Garage
Workshop
Sunroom
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Finish with:
Tile & Stone
Luxury Vinyl
Polished Concrete
We've Got Your Back: A Backup Floor Sensor
Every complete WarmlyYours floor heating system—TempZone™, Environ™, or Slab Heat—ships with two floor sensors: one with the heating mat or cable and one with the thermostat. Install the backup right beside the primary sensor and run both leads to the thermostat box, but connect only the primary; the backup stays disconnected until it is needed.
The floor sensor lives under your tile, wood, carpet, or concrete, where it tells the thermostat how warm the floor really is. If that sensor is ever nicked during installation or fails years down the road, replacing it would normally mean tearing up the finished floor.
With the backup already embedded in the floor, the fix takes minutes: turn off power at the breaker, disconnect the original sensor at the thermostat, connect the backup, and your heat is back on. No torn-up floor, no new flooring, no second installation. Follow your thermostat's instructions, or have a qualified electrician make the swap.
Installer tip: Install both sensors side by side, centered between the heating wires, and test each one for 8–15 kΩ before covering the floor. For Slab Heat, place the sensors in capped 3/4″ rigid metal conduit between cable runs, clear of the heating cable, as the Slab Heat installation manual describes.
How Does Heated Concrete Flooring Work?
Electric radiant floor heating works by embedding thin heating cables or mats within or beneath the concrete slab. The cables warm the concrete mass, which then radiates heat upward to warm the room's surfaces and occupants—not just the air. This is fundamentally different from forced-air systems that blow heated air through ducts, creating drafts and uneven temperatures.
New Construction: Cables in the Slab
For new builds, heating cables are positioned within the concrete pour itself, typically 2–3 inches below the finished surface. The concrete slab acts as a massive thermal battery—absorbing heat when the system runs and releasing it gradually. For best results, the slab should be at least 4 inches thick with proper insulation underneath.
Already Have a Concrete Slab?
Adding heat to an existing slab with a finished floor on top (tile, stone, luxury vinyl) is a standard floor heating installation—not a slab-embedded system. Visit our main floor heating page to find the right system for your floor type.
How Long Do Heated Concrete Floors Last?
When properly installed, electric radiant floor heating systems are designed to last the lifetime of the floor itself—typically 25 years or more. There are no moving parts to wear out and no maintenance required. All WarmlyYours systems are backed by our industry-leading warranty covering both labor and materials.
How to Install Floor Heating in a Concrete Slab
Slab Heat cables and mats are designed specifically for embedding in a new concrete pour. This is a new-construction installation—cables are positioned within the slab itself, typically 2–3 inches below the finished surface. The concrete acts as a massive thermal battery, absorbing heat and releasing it slowly and evenly.
Step-by-Step Installation
- Step 1: Prepare the sub-grade and install rigid foam insulation board to prevent heat loss downward.
- Step 2: Lay rebar or wire mesh at the planned cable height within the slab.
- Step 3: Position Slab Heat cables or mats per your SmartPlan layout, securing them to the rebar or mesh with cable ties.
- Step 4: Test the heating cables with an ohmmeter—check resistance before, during, and after the concrete pour.
- Step 5: Pour concrete slab (minimum 4 inches thick) over the cables, ensuring they remain at proper depth (2–3 inches below the surface).
- Step 6: Allow the concrete to fully cure (typically 28 days) before turning on the heating system.
- Step 7: Wire the thermostat and commission the system. The concrete slab will absorb and radiate heat evenly.
Important Considerations
- Insulation is critical: Rigid foam insulation under the slab directs heat upward instead of into the ground, dramatically improving efficiency and reducing operating costs.
- Cure time: Concrete must fully cure (typically 28 days) before the heating system is turned on. Premature activation can cause cracks.
- Existing slabs: If you already have a concrete slab and want to add a floor covering on top, that's a different type of installation—see our floor heating systems for above-slab options.
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Frequently Asked Questions
Showing 10 of 11 questions
Yes, heated concrete floors are a high-value investment that transforms cold surfaces into consistent radiant heat sources. With an ROI of 50-80% at resale and low operating costs, they provide immediate comfort and long-term value. WarmlyYours has installed over 300,000 systems since 1999, proving the reliability of this solution.
Yes — but the approach is different from new construction. You cannot embed cables into an existing cured slab, so there are two practical options for adding radiant heat to an existing concrete floor:
Option 1: Above-Slab Installation (Most Common)
Electric heating cables or mats are installed on top of the existing concrete slab, embedded in a thin layer of self-leveling underlayment or mortar before the finish floor is applied. This adds approximately ¼ to ½ inch to the floor height.
- Works under tile, stone, LVP, laminate, and engineered hardwood
- WarmlyYours TempZone™ Cable is ideal for this approach — it can be laid at custom spacing over any concrete surface
- An uncoupling membrane (such as Prodeso) can be used as the installation bed, adding crack isolation benefits
Option 2: Floating Floor System
A floating floor system with built-in heating (such as WarmlyYours Environ™ Flex Roll) can be installed over concrete without any mortar or self-leveling compound — ideal for renovation projects where minimal height gain is important.
Important: Insulate from Below
Existing slabs on grade often lack insulation beneath them. While you can't add under-slab insulation retroactively, using a thermal underlayment on top of the slab (such as WarmlyYours ThermalSheet) helps direct heat upward rather than losing it into the concrete mass.
Get a free SmartPlan™ or Instant Quote to find the best solution for your existing slab.
Yes. Without insulation, a concrete slab draws heat down from the floor heating, so the floor warms slowly and uses more energy. Over an existing slab, lay ThermalSheet, WarmlyYours’ insulating underlayment, under the heating system to send the heat up into the floor. ThermalSheet replaces CeraZorb, which is no longer sold.
No, properly installed radiant heating does not cause concrete to crack. The heating cables are designed to expand and contract with the slab. By maintaining a consistent temperature, the system can actually reduce stress from extreme freeze-thaw cycles. Always follow industry standards for cable depth and control joint placement.
WarmlyYours makes it easy to get started with in-slab concrete floor heating — whether you want a quick price estimate or a full professional installation layout.
Option 1: Instant Quote
Use the WarmlyYours Instant Quote tool to get product recommendations and pricing in minutes. Simply enter your room dimensions and the tool will calculate the right cable size, coverage, and cost for your slab.
Option 2: Free SmartPlan™
For a complete, engineer-drawn installation layout, submit your floor plan for a free SmartPlan™. Our team will:
- Design the exact cable layout for your slab dimensions and shape
- Specify cable spacing and wattage per square foot
- Identify the optimal thermostat location and cold lead routing
- Provide a complete materials list
The SmartPlan™ is provided at no charge and is ideal for contractors, builders, and homeowners planning new construction or a slab addition.
Talk to an Expert
Prefer to speak with someone? WarmlyYours has a team of radiant heating experts available 24/7 to answer questions about your in-slab project. Visit the in-slab concrete floor heating page to get started.
Installing electric radiant heating in a concrete slab is done during the construction or renovation process, before the concrete is poured. Here is a step-by-step overview:
- Prepare the subbase: Ensure the ground is properly compacted and a vapor barrier is in place. Add rigid foam insulation beneath the slab to prevent heat loss downward into the ground — this is critical for efficiency.
- Lay rebar or wire mesh: The heating cable will be tied to this grid to hold it in position during the pour.
- Install the heating cable: WarmlyYours electric heating cable is laid out in parallel runs at a consistent spacing (typically 3–4 inches apart for primary heat, wider for supplemental). Never cross or overlap cables.
- Connect the cold leads: The non-heating lead wires are routed to the wall where the thermostat will be mounted.
- Test the cable resistance: Before pouring, verify the cable resistance with a multimeter to confirm no damage has occurred. Record the reading.
- Pour the concrete: The slab is poured carefully over the cables. Avoid dragging equipment directly over the cables.
- Install the thermostat: Once the slab has cured (typically 28 days), connect the system to a WarmlyYours thermostat and commission the system.
Get a Custom Installation Plan
WarmlyYours provides a free SmartPlan™ — a professional layout drawn by our engineers showing exact cable placement, spacing, and wattage for your specific slab. You can also get an Instant Quote online in minutes.
In-slab concrete heating typically takes 2–4 hours to reach target temperatures due to the slab's high thermal mass. While the warm-up time is longer than other floor types, the concrete retains heat significantly longer after the system cycles off. Using a WiFi thermostat to schedule heating is recommended.
Electric radiant floor heating typically costs between $5 and $12 per square foot for the heating elements. Total project costs vary based on the system type, insulation requirements, and thermostat selection. Operating costs are remarkably low, often ranging from $0.01 to $0.15 per hour depending on local electricity rates.
In-slab radiant floor heating is highly efficient when properly designed and insulated — but it works differently from other heating systems, and understanding those differences is key to maximizing efficiency.
Why It's Efficient
- Thermal mass advantage: Concrete stores heat and releases it slowly and evenly, meaning the system doesn't need to run constantly — it heats the slab, then the slab radiates warmth for hours after the system cycles off.
- No heat loss through ducts: Unlike forced-air systems, there are no ducts to lose heat through — 100% of the energy goes into the floor.
- Lower thermostat settings: Radiant heat warms people and objects directly, so rooms feel comfortable at lower air temperatures — typically 2–4°F lower than forced air, reducing energy use.
- Zone control: Each room or zone can be controlled independently, so you only heat the spaces you're using.
The Importance of Under-Slab Insulation
The single biggest factor in in-slab efficiency is insulating beneath the slab. Without it, a significant portion of heat is lost downward into the ground. Rigid foam insulation (minimum R-10) under the slab is strongly recommended for all in-slab heating projects.
Estimate Your Operating Costs
Use the free WarmlyYours Energy Use Calculator to estimate daily and annual operating costs based on your slab size, local electricity rate, and usage schedule. You can also use the Heat Loss Calculator to determine if in-slab heating can serve as your primary heat source.
Ready to get started? Get an Instant Quote or request a free SmartPlan™.
A heated concrete slab is compatible with most hard flooring types. Here's what works well and what to avoid:
- ✅ Tile & Stone — The best choice for a heated slab. Excellent heat conductor, highly durable, and completely unaffected by the temperature cycling of radiant heat.
- ✅ Polished or Stained Concrete — The slab itself becomes the finish floor — no additional flooring needed. Very popular in modern and industrial interiors.
- ✅ Luxury Vinyl Plank (LVP) — Works well over heated slabs; ensure the product is rated for use with radiant heat and has a combined tog rating of 1.0 or less.
- ✅ Engineered Hardwood — Compatible; the dimensional stability of engineered wood handles the mild temperature changes of a slab system well.
- ✅ Laminate — Compatible when rated for underfloor heating; keep slab temperatures below 85°F (29°C).
- ⚠️ Solid Hardwood — Use with caution; the slow, even heat of a slab system is gentler than other radiant types, but solid hardwood can still expand and contract. Consult your flooring manufacturer.
- ❌ Thick carpet with high tog underlayment — Not recommended; insulates the slab too heavily and significantly reduces heating efficiency.
Key Rule: Keep Slab Surface Temperature Below 85°F (29°C)
Most flooring manufacturers require the floor surface temperature to stay at or below 85°F (29°C). A floor-sensing thermostat — included with all WarmlyYours systems — monitors and maintains this automatically.
Not sure which system is right for your flooring type? Request a free SmartPlan™ or get an Instant Quote and our team will guide you.
In-slab radiant floor heating is an electric heating system where heating cables are embedded directly inside a concrete slab before it is poured. The cables become a permanent part of the slab, which then acts as a large thermal mass — absorbing heat and radiating it evenly upward into the room.
How It Works
- Electric heating cables are laid out and secured to rebar or a wire mesh grid on top of the subbase
- Concrete is poured over the cables, fully encasing them
- Once cured, the slab is connected to a thermostat and powered on
- The concrete heats up slowly and radiates warmth evenly across the entire floor surface
Key Benefits
- Even, consistent heat: No hot or cold spots — the entire slab surface radiates warmth uniformly
- Invisible system: No visible heating elements, vents, or radiators
- Long-lasting: Cables embedded in concrete are protected from damage and can last the lifetime of the building
- Ideal for new construction: Best installed during the initial pour of a new slab or addition
Not sure where to start? Request a free SmartPlan™ and our engineers will design a custom layout for your slab.
