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14 Best Insulation For Under House (2023 Updated)

Insulation is important for under your house because it helps to keep the heat in during the winter and the cool air in during the summer. It also helps to keep your energy bills down because it takes less energy to heat and cool your home.

14 Best Insulation For Under House

Product Image Product Name Features Price

Reflectix BP24010 24 in. x 10 ft. Foil Insulation

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

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)

Reflectix Foil Insulation 16"X50'

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

Frost King 16"X1"X48" Insulation CF1

  • 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

Reflectix Staple Tab Double Bubble Foil Insulation Roll, 16" x 25'

  • 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

Roxul 40260 Insulation,wool,foil Backing

  • 1 in X 48 in X 24 in

Reflectix 48 in. x 100 ft. Double Reflective Insulation

  • 48 in. X 100′

Roxul 40320 Insulation,wool,0 to 1200 degreesF

  • 4 / 1 in
Reflectix BP24010 24 in. x 10 ft. Foil Insulation
  • Inhibits or eliminates condensation
  • Nontoxic/no carcinogenic
  • Does not require Protective clothing, goggles, or respirator
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)
Reflectix Foil Insulation 16"X50'
  • Size: 16 x 50 ft.
  • Coverage Area: 67 sq. ft.
  • Great Gift Idea.
Frost King 16"X1"X48" Insulation CF1
  • 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
Reflectix Staple Tab Double Bubble Foil Insulation Roll, 16" x 25'
  • 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
Roxul 40260 Insulation,wool,foil Backing
  • 1 in X 48 in X 24 in
Reflectix 48 in. x 100 ft. Double Reflective Insulation
  • 48 in. X 100′
Roxul 40320 Insulation,wool,0 to 1200 degreesF
  • 4 / 1 in

1. 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

2. 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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eBay
Walmart
Ace Hardware

Product Details

Specifications

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

3. 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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Product Details

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

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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Max Warehouse

Product Details

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

Reviews From Real Customers

southernguy44
glesando
SSMtim

5. 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

Reviews From Real Customers

B M.
Bob
sandymauer

6. 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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Product Details

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

7. Rockwool Safe’n’Sound Stone Wool Insulation RXSS323

Rockwool Safe'n'Sound Stone Wool Insulation RXSS323

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Product Details

Specifications

Details
For Use in Duct No
For Use in Vents No
Thickness (Inches) 3
Vapor Retardant No
Fits 2 x 4 Walls Yes

Reviews From Real Customers

Jeremy
rockwool.com
Pb004

8. Rockwool Safe’n’Sound Stone Wool Insulation 47 in. x 15-1/4 in.

Rockwool Safe'n'Sound Stone Wool Insulation 47 in. x 15-1/4 in.

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Lowe’s

Product Details

Specifications

Details
For Use in Crawlspaces Yes
For Use in Windows No
Formaldehyde Free No
Stud Spacing (Inches) 16
R-Value per Inch 0.0

9. Roxul 40260 Insulation,wool,foil Backing

Roxul 40260 Insulation,wool,foil Backing

  • 1 in X 48 in X 24 in

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Amazon
Grainger Industrial Supply
SupplyApp.com
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

Reviews From Real Customers

Shawn

10. Reflectix 48 in. x 100 ft. Double Reflective Insulation

Reflectix 48 in. x 100 ft. Double Reflective Insulation

  • 48 in. X 100′

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Amazon
The BuildClub
Do it Best
Valu Home Centers

Product Details

Specifications

Details
Energy Star Certified Yes
Width 48 in.
Thicknes 5/16 in.
R Value R-3.7 to R-21
Facing Reflective

Reviews From Real Customers

MelodyJune
The witch

11. Rockwool Comfortbatt Stone Wool Insulation

Rockwool Comfortbatt Stone Wool Insulation

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Home Depot
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Instacart

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

12. Rockwool Comfortboard 80 R- 6 Wall 48-sq ft Unfaced Stone Wool Batt Insulation (24-in W x 48-in L) | RXCB11224

Rockwool Comfortboard 80 R- 6 Wall 48-sq ft Unfaced Stone Wool Batt Insulation (24-in W x 48-in L) | RXCB11224

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Lowe’s
Home Depot

Product Details

Specifications

Details
R-Value per Inch 4
Package Quantity 6
For Use in Garage Doors No
Package Weight (lbs.) 48
Width (Inches) 24

Reviews From Real Customers

W Hunter
lowes.ca

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

Roxul 40320 Insulation,wool,0 to 1200 degreesF

  • 4 / 1 in

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Grainger Industrial Supply
SupplyApp.com
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

Reviews From Real Customers

Nathan
Len

14. Primesource – Roxul RXCB3523 R15 23×47 Bat Insulation

Primesource - Roxul RXCB3523 R15 23x47 Bat Insulation

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Product Details

Specifications

Details
Assembled Product Weight 0 oz

Conclusion

There are many benefits to insulating your under house. Insulation will help to keep your home cooler in the summer and warmer in the winter by creating an thermal barrier. This will lead to lower energy bills as your HVAC system won’t have to work as hard to maintain a comfortable temperature.

In addition, insulation can help to reduce noise from outside and inside your home.

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