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UnderFloor Retro-Fit Mats

UnderFloor is now available to fit 16" (most common) and 12" joist spaces (measured center to center)

SunTouch® UnderFloor™ radiant floor heating mats are the perfect solution for nearly every type of floor covering. These special mats warm existing floors without having to replace the floor coverings. Our Under Floor Heating mats are DIY friendly or can be installed by a handyman or contractor. All wiring should be done by an electric professional.

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  1. SunTouch UnderFloor 16" x 19.5' long 240V 1A

    SunTouch UnderFloor 16" x 19.5' long 240V 1A

    List Price: $354.90

    Our Price: $338.00

    SunTouch UnderFloor 2401916U2ST is a safe and efficient radiant electric floor heating system retrofitting an existing cold floor with heat without disturbing the existing floor covering. Learn More
  2. SunTouch UnderFloor 16" x 19.5' long 120V 2.1A

    SunTouch UnderFloor 16" x 19.5' long 120V 2.1A

    $338.00
    SunTouch UnderFloor 1201916U2ST is a safe and efficient radiant electric floor heating system retrofitting an existing cold floor with heat without disturbing the existing floor covering. Learn More
  3. SunTouch UnderFloor 16" x 18' long 120V 1.9A

    SunTouch UnderFloor 16" x 18' long 120V 1.9A

    $315.00
    SunTouch UnderFloor 1201816U2ST is a safe and efficient radiant electric floor heating system retrofitting an existing cold floor with heat without disturbing the existing floor covering. Learn More
  4. SunTouch UnderFloor 16" x 16' long 120V 1.7A

    SunTouch UnderFloor 16" x 16' long 120V 1.7A

    $282.00
    SunTouch UnderFloor 1201616U2ST is a safe and efficient radiant electric floor heating system retrofitting an existing cold floor with heat without disturbing the existing floor covering. Learn More
  5. SunTouch UnderFloor 16" x 16' long 240V 0.8A

    SunTouch UnderFloor 16" x 16' long 240V 0.8A

    $282.00
    SunTouch UnderFloor 2401616U2ST is a safe and efficient radiant electric floor heating system retrofitting an existing cold floor with heat without disturbing the existing floor covering. Learn More
  6. SunTouch UnderFloor 16" x 14' long 120V 1.5A

    SunTouch UnderFloor 16" x 14' long 120V 1.5A

    $249.00
    SunTouch UnderFloor 1201416U2ST is a safe and efficient radiant electric floor heating system retrofitting an existing cold floor with heat without disturbing the existing floor covering. Learn More
  7. SunTouch UnderFloor 16" x 12' long 120V 1.3A

    SunTouch UnderFloor 16" x 12' long 120V 1.3A

    $218.00
    SunTouch UnderFloor 1201216U2ST is a safe and efficient radiant electric floor heating system retrofitting an existing cold floor with heat without disturbing the existing floor covering. Learn More
  8. SunTouch UnderFloor 16" x 12' long 240V 0.6A

    SunTouch UnderFloor 16" x 12' long 240V 0.6A

    $218.00
    SunTouch UnderFloor 2401216U2ST is a safe and efficient radiant electric floor heating system retrofitting an existing cold floor with heat without disturbing the existing floor covering. Learn More
  9. SunTouch UnderFloor 12" x 16' long 240V 0.6A

    SunTouch UnderFloor 12" x 16' long 240V 0.6A

    $227.00
    SunTouch UnderFloor 2401612U2ST is a safe and efficient radiant electric floor heating system retrofitting an existing cold floor with heat without disturbing the existing floor covering. Learn More
  10. SunTouch UnderFloor 12" x 16' long 120V 1.3A

    SunTouch UnderFloor 12" x 16' long 120V 1.3A

    $227.00
    SunTouch UnderFloor 1201612U2ST is a safe and efficient radiant electric floor heating system retrofitting an existing cold floor with heat without disturbing the existing floor covering. Learn More

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SunTouch Underfloor is Easy to Install

If you have access under a floor, simply staple UnderFloor mats between the joists. These effective, UL-Listed mats deliver 10 watts/sq. ft. of floor area (about 34 BTU/hr/sq. ft.) UnderFloor mats will warm wood, vinyl, laminates, or tile floor coverings. With UnderFloor mats, most floors can be heated up to 12 to 15 degrees F warmer than they would otherwise be. Carpeted floors will not warm up as much as other floor coverings due to the high insulation value of carpet and padding. You may experience a temperature rise in the floor of between 6 and 15 degrees, which may or may not meet your satisfaction. Insulation installed below the mats is essential to complete the installation.

25 Years Warranty for SunTouch UnderFloor Retro-Fit Mats

SunTouch UnderFloor has 2 layers of Radiant Foil (that is the blue you see) for improved performance and the new widths and lengths should work well for all North American Homes.

Not Only are we the Only Electric Under Floor Heating solution - UnderFloor has a 25 Year Warranty!

  • Transferable warranty to future owners - Unique in the industry
  • 25 year Warranty is backed by a $1.4 Billion USA manufacturer
  • With more than 130 years in business, Suntouch is a solid manufacturer, not a fly-by-night company who has been manufacturing for a few years as a business side line. Radiant Heating is all they do in this 142,000 Sq Foot factory MADE IN THE USA
  • NYSE listed (symbol WTS) and manufactured in Springfield, MO, USA
  • Easy To Install Electric Under Floor Warming
  • ZERO Electro Magnetic Field (EMF) emission for Your Safety Independently tested and verified Read about EMF Here

All UnderFloor Mats are In Stock and Ready to Ship

All production sizes are in stock EXCEPT: 12" sizes longer than 14' - These are available by Special order in 1 week or less

Under Floor Heat Installation Instructions Between Joists in crawlspace

  • The complete manual for Installation of the SunTouch UnderFloor System under existing floors in the joist bays. Heat an existing cold floor if you have access underneath.