Internet #100549260

Model # 787264

Store SKU #787264

0719968750017

Rmax Thermasheath-3 1 in. x 4 ft. x 8 ft. R-6 Polyisocyanurate Rigid Foam Insulation Board

  • Energy efficient
  • For use in residential and commercial buildings
  • ENERGY STAR approved
$ 21 22

Frequently Bought Together

Frequently Bought Together

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Product Overview

  • Energy efficient
  • For use in residential and commercial buildings
  • ENERGY STAR approved
R-Matte Plus-3/Thermasheath-3 is rigid foam plastic thermal insulation board composed of environmentally sound, closed cell, polyisocyanurate foam bonded to a durable white-matte (non-glare) aluminum facer and a reflective reinforced aluminum facer. This product is suitable for use in wall sheathing applications in new residential, commercial and agricultural buildings and for thermal retrofit construction to existing buildings. This ENERGY STAR qualified R-Matte Plus-3/Thermasheath-3 provides R6 with dimensions of 1 in. x 4 ft. x 8 ft. This product is designed for exterior and interior, non-structural uses.
  • Rmax polyiso sheathing offers the GREATEST R-value per inch currently available in a rigid foam board
  • R-Matte plus-3/Thermasheath-3 is applied to the exterior or interior face of wood or metal studs to cover all studs, sills, plates and header constructions, thereby providing insulation over areas not normally covered by insulation products
  • Superior resistance to moisture and vapor in above grade applications
  • Polyiso rigid foam board offers superior fire protection properties compared to any other rigid foam board insulation
  • ENERGY STAR qualified to meet or exceed federal guidelines for energy efficiency for year-round energy and money savings
  • When taped and flashed, the Rmax polyiso board greatly reduces air infiltration and prevents thermal bridging caused by heat and cold transmission through studs
  • Lightweight and easily cut to size



  • Click here to learn more about Eco Options and Energy Efficiency
  • How much do you need? Let our calculator help:
    Insulation calculator button

Product Overview

  • Energy efficient
  • For use in residential and commercial buildings
  • ENERGY STAR approved
Model #: 787264
Sku #: 787264
Internet #: 100549260

R-Matte Plus-3/Thermasheath-3 is rigid foam plastic thermal insulation board composed of environmentally sound, closed cell, polyisocyanurate foam bonded to a durable white-matte (non-glare) aluminum facer and a reflective reinforced aluminum facer. This product is suitable for use in wall sheathing applications in new residential, commercial and agricultural buildings and for thermal retrofit construction to existing buildings. This ENERGY STAR qualified R-Matte Plus-3/Thermasheath-3 provides R6 with dimensions of 1 in. x 4 ft. x 8 ft. This product is designed for exterior and interior, non-structural uses.

  • Rmax polyiso sheathing offers the GREATEST R-value per inch currently available in a rigid foam board
  • R-Matte plus-3/Thermasheath-3 is applied to the exterior or interior face of wood or metal studs to cover all studs, sills, plates and header constructions, thereby providing insulation over areas not normally covered by insulation products
  • Superior resistance to moisture and vapor in above grade applications
  • Polyiso rigid foam board offers superior fire protection properties compared to any other rigid foam board insulation
  • ENERGY STAR qualified to meet or exceed federal guidelines for energy efficiency for year-round energy and money savings
  • When taped and flashed, the Rmax polyiso board greatly reduces air infiltration and prevents thermal bridging caused by heat and cold transmission through studs
  • Lightweight and easily cut to size



  • Click here to learn more about Eco Options and Energy Efficiency
  • How much do you need? Let our calculator help:
    Insulation calculator button

Info & Guides

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Brand Thermasheath SilveRboard Thermasheath
Name Rmax Thermasheath-3 1 in. x 4 ft. x 8 ft. R-6 Polyisocyanurate Rigid Foam Insulation Board 24 in. x 1 in. x 48 in. R5 Radiant Acoustic Insulation Kit - STC 19 (5-Piece) Rmax Thermasheath-3 2 in. x 4 ft. x 8 ft. R-13.1 Polyisocyanurate Rigid Foam Insulation Board
Price
$21.25
$34.98 /package
$35.56
Ratings (123) (154) (91)
Sheathing Type ISO EPS ISO
Insulation Location 2x4 Wall,2x6 Wall,Attic ,Basement ,Ceiling Insulation,Crawlspace ,Exterior Sheathing,Garage ,Re-Siding 2x4 Wall,2x6 Wall,2x8 Wall,Attic ,Basement ,Ceiling Insulation,Exterior Sheathing,Garage ,Metal Building,Re-Siding 2x4 Wall,2x6 Wall,Attic ,Basement ,Ceiling Insulation,Crawlspace ,Exterior Sheathing,Garage ,Re-Siding
Product Width (in.) 48 in 48 in 48 in
Product Length (ft.) 8 ft 10 ft 8 ft
Faced or Unfaced Faced Faced Faced
Product Thickness (in.) 1 in 1 in 2 in
View Product View Product View Product

Specifications

Dimensions

Coverage Area (Sq.Ft)
32
Product Length (ft.)
8 ft
Product Thickness (in.)
1 in
Product Width (in.)
48 in

Details

Compatible Install Surface
Cement,Existing Drywall,Wood
Faced or Unfaced
Faced
Insulation Features
Formaldehyde Free
Insulation Location
2x4 Wall,2x6 Wall,Attic ,Basement ,Ceiling Insulation,Crawlspace ,Exterior Sheathing,Garage ,Re-Siding
Insulation R-Value
R6
Insulation Type
Foam Board Insulation
Interior/Exterior
Exterior
Number of Pieces
48
Product Weight (lb.)
7lb
Sheathing Size
8 ft. x 1 in. x 48 in.
Sheathing Type
ISO

Warranty / Certifications

Warranty Information
Standard Warranty

Specifications

Dimensions

Coverage Area (Sq.Ft)
32
Product Length (ft.)
8 ft
Product Thickness (in.)
1 in
Product Width (in.)
48 in

Details

Compatible Install Surface
Cement,Existing Drywall,Wood
Faced or Unfaced
Faced
Insulation Features
Formaldehyde Free
Insulation Location
2x4 Wall,2x6 Wall,Attic ,Basement ,Ceiling Insulation,Crawlspace ,Exterior Sheathing,Garage ,Re-Siding
Insulation R-Value
R6
Insulation Type
Foam Board Insulation
Interior/Exterior
Exterior
Number of Pieces
48
Product Weight (lb.)
7lb
Sheathing Size
8 ft. x 1 in. x 48 in.
Sheathing Type
ISO

Warranty / Certifications

Warranty Information
Standard Warranty

Questions & Answers

Does R-Max need to be covered by 1/2" sheetrock when installed on basement walls?

Asked by: Randy
It depends. You can read the certification report yourself: https://www.rmax.com/s/TER-1309-03-TS-3-TS-XP-TSX-2019-10.pdf See section 5.4.2.4. It states "The thermal barrier required by Section 5.4.2.1 [e.g. 1/2" sheetrock] is not required in the following applications... Attic, crawlspace or other uninhabitable space applications meeting the following requirements...". You have to determine if your application meets the requirements that follow.
Answered by: lnm
Date published: 2020-01-23

Can this be doubled and create a better r value I have a metal building I wish to insulate but d...

Can this be doubled and create a better r value I have a metal building I wish to insulate but do not wan to use rolls/batts or blow in I do not think the R value of this is enough for the shed
Asked by: Betty
For a 2x4 framed wall, you can get this in 3.5" thickness and it will fill the entire wall. Many sizes in between are also available.
Answered by: wilsotc
Date published: 2019-05-19

can I get it cut at the store to the sizes I need?

Asked by: Joe
it cut with saw or knife easily. you cut it a 1/4 inch and break it then cut the back foil with a knife. saws are messy a knife is cleaner
Answered by: Insulatuionman
Date published: 2020-03-24

WIFI Blocker? will the double foil block a signal from the basement if I line the basement ceiling with this?

Asked by: a91625
The layer of aluminum foil will degrade WiFi and cell phone signals. Foamular XPS foam board is a better choice for the ceiling of your basement; Foamular is not foil faced. If you are insulating your basement, Foamular is also a better choice for the walls and floor -- because it does not absorb moisture. Polyiso foam does. When you install foam board on the ceiling, be sure to seal all of the joints and edges to block air leaks. DAP 230 or HVAC mastic work well for joints and small gaps. Use the 'Window and Door' version of Great Stuff spray foam for larger gaps. Also note that foam board is flammable and emits toxic gas when it burns. It must be covered by an approved 'thermal barrier' in any basement, living space, garage or attic storage area. The standard is 1/2" drywall. I hope this is helpful. Mark
Answered by: BvilleBound
Date published: 2020-04-16
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