20 Best Insulation For Radiant Floor Heat (2022 Updated)

Radiant floor heat is a type of heating that uses warm water to heat the floors of a home. The water is circulated through a system of pipes called a hydronic system. The pipes are typically made of plastic or copper and are buried in the floor.

Insulation is used to keep the heat from escaping through the floor and into the room. The most common type of insulation for radiant floor heat is foil-faced bubble wrap.

20 Best Insulation For Radiant Floor Heat

1. Reflectix Foil Insulation – 4′ x 25′ Roll

Reflectix Foil Insulation - 4' x 25' Roll

  • Product Type: Auto Accessory
  • Package Quantity: 1
  • Package Dimensions: 25.0 cms (L) x 25.0 cms (W) x 120.0 cms (H)
  • Package Weight: 5.7 lbs

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Specifications

Details
Assembled Depth (in) 10.0 in
Assembled Height (in) 48.0 in
Assembled Width (in) 10.0 in
Assembled Weight (lbs) 6 lbs
Package Weight 26

2. Reflectix Staple Tab Double Bubble Foil Insulation Roll, 16″ x 25′

Reflectix Staple Tab Double Bubble Foil Insulation Roll, 16

  • Reflective insulation for use in a crawl space, attic, wall, metal buildings and post and frame structures
  • Fiber free, environmentally safe, easy to install and lightweight
  • Air bubble lining resists transfer of heat
  • Non-toxic

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Specifications

Details
Assembled Depth (in) 10.0 in
Assembled Height (in) 16.0 in
Assembled Width (in) 10.0 in
Assembled Weight (lbs) 3 lbs
Package Weight 26
Coverage Area 33.33 ft²
Length 25 ft
Width 16 in
Thickness 0.3125 in
Material Reflective, Poly
Package Type Rolls
R Value 3.7
Recommended Fastener Staples
Recommended Safety Equipment Safety Glasses
Recommended Use Attics, Crawl Spaces, Walls, Radiant Flooring Systems, Ducts, Pipes and Water Heaters.
Type Staple Tab Reflective Insulation
Package Contents 1 Roll

3. Reflectix BP24010 24 in. x 10 ft. Foil Insulation

Reflectix BP24010 24 in. x 10 ft. Foil Insulation

  • Inhibits or eliminates condensation
  • Nontoxic/no carcinogenic
  • Does not require Protective clothing, goggles, or respirator

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Details
Coverage Area 20 ft²
Length 10 ft
Width 24 in
Thickness 0.312 in
Material Metalized polyester, polyethylene
Package Type Rolls
R Value 4.7
Recommended Fastener Staples
Recommended Safety Equipment Safety goggles
Recommended Use hvac, attic, basement ceiling, hot water radiator, cathedral ceiling, crawl space, duct, garage door, knee wall, pipe wrap, radiant floor, wall, block wall, water heater, work shop
Type Reflective Insulation
Package Contents One roll of reflective insulation

4. Reflectix Foil Insulation 16″X50′

Reflectix Foil Insulation 16

  • Size: 16 x 50 ft.
  • Coverage Area: 67 sq. ft.
  • Great Gift Idea.
  • Satisfaction Ensured.

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Specifications

Details
Coverage Area 67 sq ft
Length 50 ft.
Width 16 in.
R Value R-3.7 to R-21
Insulation Type Radiant Barrier

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southernguy44
glesando
SSMtim

5. QuietWarmth Retrofit Mat 16″ x 60″ 120 Volts

QuietWarmth Retrofit Mat 16

  • 17″ X 5′

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Specifications

Details
Coverage (Sq. Feet) 6.67
Volts 120-volt
Length (Inches) 60
Wattage 10
Wi-Fi Compatibility No

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member985655
Dave302
Pun007

6. QuietWarmth QWARM1.5X10F120 120-Volt Radiant Heat Film for Floating Floors

QuietWarmth QWARM1.5X10F120 120-Volt Radiant Heat Film for Floating Floors

  • 1.5′ X 10′ (120v)

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Specifications

Details
Wi-Fi Compatibility No
Touchscreen No
Coverage (Sq. Feet) 15
Installation Location Above subfloor
Wattage 156

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Bernard C
MonduWD
JGrant

7. WarmlyYours TRT120-1.5×27 TempZone Flex Roll 120V 1.5′ x 27′, 40.5 Sq

WarmlyYours TRT120-1.5x27 TempZone Flex Roll 120V 1.5' x 27', 40.5 Sq

  • 1.5′ X 27′ / 40.5 Sq. Ft / 5.1 Amps And 2073 Btu

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Wayfair

Product Details

Specifications

Details
Floor Load 0.6 kW
Ohms 23.7 Ohm
Approvals cULus listed
Warranty 25 Year Warranty
Wet Location Listed US, Canada

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Kurt H.
Luanne S.
Brady H.

8. Frost King 16″X1″X48″ Insulation CF1

Frost King 16

  • Use for insulating, cushioning, and noise dampening
  • Safe alternative – no gloves, face mask, or goggles needed
  • Cut or rip to fit pipes and ducts, walls, and much more

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Product Details

Specifications

Details
Self Sealing No
Maximum Pipe Size 16 in.
R Value 4
Product Type Pipe Wrap
Length 48 in.
Thickness 1 in.
Flexibility Flexible
Minimum Temperature 32 F
Maximum Temperature 100 F
Color Gray
Wall Thickness 1 in.
Brand Name Frost King

9. SilveRboard 24 in. x 1 in. x 48 in. R5 Radiant Acoustic Insulation Kit – STC 19 …

SilveRboard 24 in. x 1 in. x 48 in. R5 Radiant Acoustic Insulation Kit - STC 19 ...

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Product Details

Specifications

Details
Product Thickness (in.) 1 in
Insulation R-Value R5
Faced or Unfaced Faced
Insulation Features Formaldehyde Free,Vapor Retardant
Insulation Type Foam Board Insulation
Interior/Exterior Interior/Exterior
Number of Pieces 12
Pack Size 12
Sheathing Size 2 ft. x 1 in. x 48 in.
Sheathing Type EPS
Cover Area Per Bag (sq. ft.) 96 ft²
Coverage Area (sq. ft.) 96 ft²
Product Length (ft.) 2 ft
Product Width (in.) 48 in

10. QuietWarmth 10 ft. x 36 in. 120-Volt Peel and Stick Radiant Floor HEATING Mat for Tile and Glue-Down Floors (Covers 30 Sq. ft.)

QuietWarmth 10 ft. x 36 in. 120-Volt Peel and Stick Radiant Floor HEATING Mat for Tile and Glue-Down Floors (Covers 30 Sq. ft.)

  • 3′ X 10′ – 120v

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Product Details

Specifications

Details
Installation Location Above subfloor
Width (Inches) 36
Touchscreen No
Wi-Fi Compatibility No
Coverage (Sq. Feet) 30

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Desi2go
Warm Feet
actingfreak1413

11. WarmlyYours ERT120-1.5×45 Environ Flex Roll 120V 1.5′ x 45′, 67.5 Sq.

WarmlyYours ERT120-1.5x45 Environ Flex Roll 120V 1.5' x 45', 67.5 Sq.

  • 1 ft. 6 ft. X 45 ft. 67.5 / Size: 6′ X 45′

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FactoryPure

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Specifications

Details
Wattage 810

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Rick C.
Terry H.
Robert H.

12. Ditra Heat Uncoupling Membrane – Dh5ma- Schluter

Ditra Heat Uncoupling Membrane - Dh5ma- Schluter

  • Easy press to lay cable – no tape or glue
  • No self-levelling layer or primer laying – time saved on application
  • Loose heating cable – greater flexibility
  • Uniform spacing of every three studs –

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Product Details

Specifications

Details
Size 32″ x 4″ x 4″ (shipping box size)

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MikeyDWpg
Michael D.
Christie W.

13. Reflectix BP24025 24 in x 25 ft Bubble Pack Insulation

Reflectix BP24025 24 in x 25 ft Bubble Pack Insulation

  • 24 in. X 25′

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Product Details

Specifications

Details
Assembled Depth (in) 10 in
Assembled Height (in) 24 in
Assembled Width (in) 10 in
Assembled Weight (lbs) 3 lbs
Package Weight 26

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MelodyJune
The witch

14. Roxul 1-1/2″ x 48″ x 24″ Mineral Wool/Foil Backing High Temperature Insulation, Density 8#, Green 560136

Roxul 1-1/2

  • 1 1/2 in X 48 in X 24 in

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Product Details

Specifications

Details
Approx. R Value 6
Thickness 1 1/2 in
Density 8#
Temp. Range 0 Degrees F to 1200 Degrees F
Length 48 in

15. Reflectix Insulation 24 x 10 R3 7 R21 Energy Star Qualified at MechanicSurplus.com Bp24010

Reflectix Insulation 24 x 10 R3 7 R21 Energy Star Qualified at MechanicSurplus.com Bp24010

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nytehawk

16. WarmlyYours TempZone 72 in. x 1.5 ft. 120-Volt Radiant Floor HEATING Kit (Covers 9 Sq. ft.)

WarmlyYours TempZone 72 in. x 1.5 ft. 120-Volt Radiant Floor HEATING Kit (Covers 9 Sq. ft.)

  • 72 in. X 1.5 ft. 120-Volt / 9 Sq. Ft

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Product Details

Specifications

Details
actual length feet 1.5
actual thickness inches 0.25
actual weight lbs 2.45
actual width inches 72
flooring product type Underfloor Heating

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Boomer19
Joe B
Kim P

17. Unitherm R-5,Unfaced,Ceramic Fiber Insulation Blanket Roll 2″ x 24″ x 50″

Unitherm R-5,Unfaced,Ceramic Fiber Insulation Blanket Roll 2

Product Details

Specifications

Details
Insulation R-Value R5
Faced or Unfaced Unfaced
Roll or Batt Roll
Product Thickness (in.) 2 in
Pack Size 1

Reviews From Real Customers

DIY NW Pa

18. Roxul 40320 Insulation,wool,0 to 1200 degreesF

Roxul 40320 Insulation,wool,0 to 1200 degreesF

  • 4 / 1 in

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Zoro

Product Details

Specifications

Details
Approx. R Value 4
Thickness 1 in
Density 8#
Temp. Range 0 Degrees F to 1200 Degrees F
Length 48 in

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Len

19. Rockwool Comfortbatt Stone Wool Insulation

Rockwool Comfortbatt Stone Wool Insulation

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Product Details

Specifications

Details
Brand Name Rockwool
Length 47 in.
Facing Unfaced
R Value R15
Product Type Insulation
Roll or Batt Batt
Thickness 3.5 in.
Number in Package 1 pk
Coverage Area 59.7 sq ft
Width 15.25 in.

Reviews From Real Customers

Average homeowner
IGCSG

20. K-Flex USA 6Rsxg3X4068 Insulation Sheet,psa Back,36X48X3/4 in

K-Flex USA 6Rsxg3X4068 Insulation Sheet,psa Back,36X48X3/4 in

  • 36x48x3/4 in

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Product Details

Specifications

Details
Insulation Body Material NBR/PVC
Wall Thickness – Insulation 3/4 in
Insulation Sheet Size 36 in x 48 in
Insulation Temp. Range -297 Degrees F to 220 Degrees F
Insulation Approx. R Value 3.0

Conclusion

The most important factor to consider when selecting an insulation for radiant floor heat is the R-value. The R-value is a measure of the insulation’s ability to resist heat flow. The higher the R-value, the better the insulation will be at resisting heat flow.

There are many different types of insulation available, so it is important to select the one that has the highest R-value for the application. Another important factor to consider is the thickness of the insulation.

The thicker the insulation, the better it will be at resisting heat flow.

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