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Model # 310891

Internet #202532856

Store SKU #614653

R-Tech 2 in. x 4 ft. x 8 ft. R-7.7 Rigid Foam Insulation
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R-Tech

2 in. x 4 ft. x 8 ft. R-7.7 Rigid Foam Insulation

  • Lightweight, easy to use
  • Multiple thicknesses
  • 2 in. x 4 ft. x 8 ft. R-7.7 Rigid Foam Insulation
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Frequently Bought Together

Frequently Bought Together

Product Overview

  • Lightweight, easy to use
  • Multiple thicknesses
  • 2 in. x 4 ft. x 8 ft. R-7.7 Rigid Foam Insulation
Insulfoam rigid foam is a high-performance built-to-spec sheathing insulation that provides superior R-value and moisture resistance. It is offered in multiple thicknesses and dimensions, in both square-edged and tongue-and-groove joints. It is lightweight and easy to use and provides an optimum balance between performance and cost. Manufactured by one of North America's leading insulation and construction materials companies.
  • Specifically developed for wall sheathing, siding underlayment and basement and foundation insulation
  • 8 ft. L easily cuts to desired size
  • Energy Star qualified to meet or exceed federal guidelines for energy efficiency for year-round energy and money savings
  • Moisture resistant with great insulating properties
  • Poly-facer on both sides for durability and flexibility
  • Note: Product may vary by store
  • How much do you need? Let our calculator help:
    Insulation calculator button

Product Overview

  • Lightweight, easy to use
  • Multiple thicknesses
  • 2 in. x 4 ft. x 8 ft. R-7.7 Rigid Foam Insulation
Model #: 310891
Sku #: 614653
Internet #: 202532856

Insulfoam rigid foam is a high-performance built-to-spec sheathing insulation that provides superior R-value and moisture resistance. It is offered in multiple thicknesses and dimensions, in both square-edged and tongue-and-groove joints. It is lightweight and easy to use and provides an optimum balance between performance and cost. Manufactured by one of North America's leading insulation and construction materials companies.

  • Specifically developed for wall sheathing, siding underlayment and basement and foundation insulation
  • 8 ft. L easily cuts to desired size
  • Energy Star qualified to meet or exceed federal guidelines for energy efficiency for year-round energy and money savings
  • Moisture resistant with great insulating properties
  • Poly-facer on both sides for durability and flexibility
  • Note: Product may vary by store
  • How much do you need? Let our calculator help:
    Insulation calculator button

Info & Guides

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Info & Guides

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Price
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Name 2 in. x 4 ft. x 8 ft. R-7.7 Rigid Foam Insulation FOAMULAR 150 1-1/2 in. x 4 ft. x 8 ft. R-7.5 Scored Squared Edge Rigid Foam Board Insulation Sheathing FOAMULAR 150 2 in. x 4 ft. x 8 ft. R-10 Scored Squared Edge Rigid Foam Board Insulation Sheathing FOAMULAR 250 2 in. x 48 in. x 8 ft. R-10 Scored Squared Edge Insulation Sheathing
Brand R-Tech Owens Corning Owens Corning Owens Corning
Ratings (54) (51) (50) (95)
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Specifications

Dimensions

Coverage Area (sq. ft.)
32
Product Length (ft.)
8 ft
Product Thickness (in.)
2 in
Product Width (in.)
48 in

Details

Faced or Unfaced
Faced
Insulation Features
Structural
Insulation Location
2x4 Walls,2x6 Walls,Attics,Basements,Crawlspaces,Exterior Sheathing,Exterior Wall Foundation,Garage,Under Slab
Insulation R-Value
R7.7
Insulation Type
Foam Board Insulation
Interior/Exterior
Interior/Exterior
Product Weight (lb.)
5.4lb
Sheathing Type
EPS

Warranty / Certifications

Warranty Information
n/a

Specifications

Dimensions

Coverage Area (sq. ft.)
32
Product Length (ft.)
8 ft
Product Thickness (in.)
2 in
Product Width (in.)
48 in

Details

Faced or Unfaced
Faced
Insulation Features
Structural
Insulation Location
2x4 Walls,2x6 Walls,Attics,Basements,Crawlspaces,Exterior Sheathing,Exterior Wall Foundation,Garage,Under Slab
Insulation R-Value
R7.7
Insulation Type
Foam Board Insulation
Interior/Exterior
Interior/Exterior
Product Weight (lb.)
5.4lb
Sheathing Type
EPS

Warranty / Certifications

Warranty Information
n/a

Questions & Answers

can this be used under a basement slab?

can this be used under a basement slab?
Asked by: crh
I would use it under a basement slab but NOT under any structural loads. So if a column or other load bears upon the slab, no.
Answered by: Bill
Date published: 2018-09-22

Can this be used for a bed?

Can this be used for a bed?
Asked by: Rick
Not sure how you would use for a bed - as a foundation? Don't think it would work, would break and be a mess.
Answered by: Chickie
Date published: 2018-04-09

what is the best way to cut into varying widths

what is the best way to cut into varying widths
Asked by: tom
There are undoubtedly alternatives, but I used a cheap utility knife with a snap-off blade like this: https://www.homedepot.com/p/13-Point-Breakaway-Knife-66-0455-HDCU/202247083 It's cheap, and it's possible to extend the blade far enough to cut through the 2" thickness of the insulation. This stuff is messy; be prepared to add cleanup to your project timeline.
Answered by: halfdog
Date published: 2018-04-02

I want to use it to insulate a wall on my shed, my question is do I place the foil paper side fac...

I want to use it to insulate a wall on my shed, my question is do I place the foil paper side facing inside or facing Out? What is the correct way to use It? BTW, my wall won't have drywall installed on top of foam board
Asked by: Jaygeo2020
Metallic plastic side OUT towards exterior wall... paper side faces the interior.
Answered by: HvnlySins
Date published: 2018-10-08
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Customer Reviews

2 in. x 4 ft. x 8 ft. R-7.7 Rigid Foam Insulation is rated 4.6 out of 5 by 54.
Rated 5 out of 5 by from I used this stuff to insulate the cinder block walls in my crawls space. I used 31/2 inch special... I used this stuff to insulate the cinder block walls in my crawls space. I used 31/2 inch special plastic fasteners I bought on Ebay. The insulation is light and easy to cut. Use a long razor to score then break it. Sort of like dry wall. Once I had technique, it was very quick to cut to size. The shiny side radiant barrier looks great and adds alot of light to a dingy space. I will finish by using foam board caulk to seal the top and edges then install white 20 mil vapor barrier to finish the encapsulation. Since the skin on the back side is impermeable, the moisture and condensation problems should drain down the back of the foam and into the drain field I installed. Closing the vents and drying out under the house has made an incredible addition to the comfort of my house. I suggest this product for crawlspace encapsulation.
Date published: 2017-02-25
Rated 2 out of 5 by from Good for low budget but poor quality: Low R-value/thickness ratio Unless they updated the product info since I've written this, they did NOT include the R-value information in the specs. For those of you looking, it is R-7.7; SKU #573781 is just under DOUBLE the R-value for only $11 more (@R-13.2).
Date published: 2013-09-06
Rated 5 out of 5 by from Good Inside House Window Insulation For the Phoenix area this product is a must to insulate home windows (inside) to reduce summer heat. Lowers cooling costs. Easy to store over winter months.
Date published: 2013-03-06
Rated 5 out of 5 by from Used it to make headstones for Halloween... they look Great!... Used it to make headstones for Halloween... they look Great!
Date published: 2017-09-07
Rated 5 out of 5 by from Used it to insulate the metal roof of a shed... Used it to insulate the metal roof of a shed in Florida with the foil face out. AC worked much more efficiently afterward
Date published: 2018-06-26
Rated 5 out of 5 by from We are Commercial Mechanical Insulators. This product is readily available and meets our specifi... We are Commercial Mechanical Insulators. This product is readily available and meets our specification requirements and is about 2/3 the cost we would normally pay going through our distributors. All the required product data is available on the Home Depot website for use in our Insulation Submittal Packages.
Date published: 2016-11-08
Rated 5 out of 5 by from I purchased this for my mother in laws double wide... I purchased this for my mother in laws double wide trailer. Her skirting had no insulation and the energy bills were high and her home very cold. Had it installed and so far working great she doesn't need as many blankets and we are waiting for the new energy bill hopefully lower.
Date published: 2018-01-16
Rated 5 out of 5 by from fast n easy to work This material provides excellent protection against all weather i used it in my garage door and it reduced the heat dramatically now my window AC is alot more efficient n my 4legged kidz can chill n relax all day.
Date published: 2018-07-24
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