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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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0732813100089

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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Name 1-1/2 in. x 4 ft. x 8 ft. R-5.78 Rigid Foam Insulation 2 in. x 4 ft. x 8 ft. R-7.7 Rigid Foam Insulation 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
Brand R-Tech R-Tech SilveRboard Thermasheath
Ratings (70) (75) (88) (43)
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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: 2018-11-02

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
Silver to the inside
Answered by: jayram1408
Date published: 2018-11-09

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: 2018-11-04
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Customer Reviews

2 in. x 4 ft. x 8 ft. R-7.7 Rigid Foam Insulation is rated 4.7 out of 5 by 75.
Rated 5 out of 5 by from I have begun insulating my basement with a poured foundation. I began with Owens Corning and of c... I have begun insulating my basement with a poured foundation. I began with Owens Corning and of course the cost was going up. It is a large future family room. After reading reviews on R-Tech I purchased around 10 sheets so far. I am completely sold. The R value is almost five points less than Corning but holding my hand on the sheets a while after installed it is warm. I used 2" on the exposed walls and 1 1/2" on undergrade walls. It is working our fine and I am saving $15.00 a sheet at Home Depot. Both sides of the sheet are covered with a plastic sealant one being the silver paper. It is easy to cut but use a long knife to keep it clean. I will be covering this with wool also so the room will be warm in winter and normal in summer. It will dent easy of hit hard but other than that this is the board to go with. Even if I used Corning I would have covered it with wool insulation. But what a barrier. I can get the benefit and save for other supplies.
Date published: 2019-01-11
Rated 5 out of 5 by from We used this as ‘skirting’ for an RV. It... We used this as ‘skirting’ for an RV. It worked great. It stopped all the wind in unexpected 20 degree weather in Arizona and our RV stayed at least 20 degrees warmer!
Date published: 2019-01-08
Rated 5 out of 5 by from Works Great ... Works Great
Date published: 2019-01-08
Rated 5 out of 5 by from This was purchased for additional insulation. It was less expensive than the brand name and it w... This was purchased for additional insulation. It was less expensive than the brand name and it works fine for my application.
Date published: 2018-12-20
Rated 5 out of 5 by from Insulation worked perfectly and was easy to install ... Insulation worked perfectly and was easy to install
Date published: 2018-12-19
Rated 5 out of 5 by from I used the insulation for the roof of my shed so I could get the Temperature up to above 75ﾟ in ... I used the insulation for the roof of my shed so I could get the Temperature up to above 75ﾟ in there so I could paint without having issues it has worked and am now able to finish painting my truck door it is 30° out side and I have a small heater in the shed before putting the insulation in the shed and with the same outside temperature it would only get to 40 degrees so yes it works well and I would recommend it
Date published: 2018-12-18
Rated 5 out of 5 by from to protect water lines and holding tank in RV during winter stay in North Eastern Nevada, cuts ea... to protect water lines and holding tank in RV during winter stay in North Eastern Nevada, cuts easily, glues to wood easily, protects well.
Date published: 2018-12-18
Rated 4 out of 5 by from It is a little messy to work with, but I felt it was worth it in the long run. I measured and cut... It is a little messy to work with, but I felt it was worth it in the long run. I measured and cut it with a small porcelain knife. I felt a saw would make a bigger mess, and I was just using it for a SHE SHED, lol. I only needed a broom for clean up, and it seems to be keeping the temp reasonable even though it is winter.
Date published: 2018-12-14
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