Internet #202530470

Model #310873

Store SKU #483214

3/4 in. x 4 ft. x 8 ft. R-2.89 Foam Insulating Sheathing

  • Cost effective insulation
  • Energy Star qualified
  • 3/4 in. x 4 ft. x 8 ft. R-2.89 Foam Insulating Sheathing
  • See More Details

Product Overview

R-Tech is a cost effective way to increase your project energy efficiency. EPS is a fully recyclable material. R-Tech is also available in thicknesses ranging in 1/8 in. increments from 3/8 in. to 5 in.

Info & Guides

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Specifications

Dimensions

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

Details

Compatible Install Surface
Cement,Concrete,Existing Drywall,Plywood,Wood
Faced or Unfaced
Faced
Insulation Features
Structural
Insulation Location
2x4 Wall,2x6 Wall,Attic,Basement,Crawlspace,Exterior Sheathing,Exterior Wall Foundation,Garage,Under Slab
Insulation R-Value
R2.89
Insulation Type
Foam Board Insulation
Interior/Exterior
Interior/Exterior
Number of Pieces
1
Product Weight (lb.)
2
Sheathing Size
8 ft. x .75 in. x 48 in.
Sheathing Type
EPS

Warranty / Certifications

Warranty Information
N/A

Questions & Answers

82Questions12Answers

I'm wanting to insulate my garage door.

Asked by JohnnyD November 19, 2019
2
Answers

Typically a water based adhesive works best when adhering R-Tech to a garage door. Below is a link the the Insulfoam Technical Bulletin listing the compatible adhesives. https://www.insulfoam.com/wp-content/uploads/2014/04/TB26-EPS-Compatible-Adhesives.pdf

can this product be used for walk-in coolers and if so what thickness for an R32 value?

Asked by Jeffrey April 24, 2019
1
Answer

Dear Jeffrey: You have the right idea, but you should use Foamular XPS foam board instead. XPS provides R-5 per inch of thickness and does not absorb moisture, so this would be ideal for your walk-in cooler. See: Foamular 250 Model # 52DD, Home Depot Internet #202085962 Store SKU #307101 Also make sure your seal the joints between the foam board panels, to block air leaks. DAP 230 is good for joints and small gaps. The 'Window and Door' version of Great Stuff foam is good for larger gaps. Both must be applied above 55 degrees -- so your walk-in cooler would need to be turned off. I hope this is helpful, Mark

Can this be used underneath a r v

Asked by melva July 24, 2017
1
Answer

Dear Melva: No. First, if the RV is mobile it would be very difficult to fasten foam board securely to the frame -- to avoid flying foam board on the highway. Second, foam board is very flammable and emits toxic gas when it burns. In homes and garages it MUST be covered by an approved thermal barrier. The standard is 1/2" drywall, which obviously will not work under an RV. Unfortunately, insulating an RV or trailer is difficult because the walls are so thin -- and insulation depends on thickness. If you have the ability to open the walls, floor and ceiling, the best option is Roxul rock wool. It provides R-4.1 per inch of thickness, which equals R-tech foam board -- but Roxul is not flammable. Plus you can easily stuff it into nooks and crannies; Roxul is much denser than fiberglass and molds kind of like clay. A board-like version is also available from Home Depot for larger flat areas: Roxul ComfortBoard sheathing. See: Roxul ComfortBatt Model # RXSS31525, Home Depot Internet #202531875 Store SKU #982937 Roxul ComfortBoard Model # RXCB11224, Home Depot Internet #206789748 Store SKU #1001748089 I hope this is helpful. Mark

Is this available in 2 inch thickness? What is the cost?

Asked by LeoB March 20, 2017
1
Answer

At present this product does not come in 2 inches thick.

I am needing to reinstate my interior garage walls. The inside of my garage is colder than it is ...

Asked by ColdGarage January 18, 2017
1
Answer

Dear ColdGarage: You have the right idea; here are some suggestions: (1) Insulate the water pipe: First, start by insulating the water pipe to your washing machine. Rubber foam sleeves are the best option. See: ArmaFlex Model # HST05812 Internet #100550644 Store SKU #420373. Even though the seam is "self adhesive", use foil HVAC tape to permanently seal the seam. See: Nashua Model # 1207792, Home Depot Internet #100030120 Store SKU #915245 (Avoid the cheaper poly foam sleeves.) If you live in an area with very cold winters, you can boost the insulation by adding a second layer for straight sections. See: ThermWell Model # F15XAD Internet #100162619 Store SKU #170795 (Note: if you decide to also insulate the entire wall as described in #3, below, fill the gaps around your pipe insulation with DAP 230 and Great Stuff foam.) (2) Garage walls: Are your garage walls "open"? In other words, can you see the studs or are they covered by drywall? If they are covered, and your key issue is the water pipe to your washing machine, then focus on insulating the water pipe -- because insulating the garage walls will be much more costly. See #3, below. (3) Insulate your garage walls: If your garage walls are 'open' (or you want to insulate the walls anyway), then foam board is a great solution. Fill the stud bays with pieces of foam board, and carefully seal all of the edges and joints to block air leaks. DAP 230 sealant is good for small gaps. The 'Window and Door' version of Great Stuff spray foam is good for larger gaps. We also recommend Tuff-R foam board, which provides significantly better insulation R-value per inch: R-5.5. See: Tuff-R Model # 268441 Internet #100322376 Store SKU #163832 If your winters are very cold, you can use two layers of foam board - 1 7/8" plus 1" -- to nearly completely fill a standard 2" x 4" stud bay. We recently completed a similar project in Massachusetts; a photo is attached. You must, however, cover the wall with new 1/2" drywall are you fill it with foam board -- because foam board is flammable. A final note: If your garage walls are covered by drywall, it must be removed to add insulation; you cannot simply install sheets of foam board on top. This would create a major fire safety risk and building code violation. You will need to remove the drywall, fill the stud bays with foam board, then install new drywall, as described above. I hope this is helpful. Mark

Could I redo the inside of a small doghouse?

Asked by Maria January 1, 2017
1
Answer

Dear Maria: Yes. Home Depot sells another foam board product that would be a better choice, however: Foamular 250. This XPS foam board is denser and tougher, and does not absorb moisture - perfect for a doghouse. I hope this is helpful. Mark

can this be used to insulate an attic knee wall over R15 faced batt insulation

Asked by Jimmie December 21, 2016
1
Answer

Yes, this can be used to insulate an attic knee wall.

can this be installed in basement over cinder block and then sheet rock.. trying to eliminate t...

Asked by mike December 16, 2016
2
Answers

Yes it can go over cinderblock. However, it will probably not solve the condensation problem and may lead to mold between the insulation and wall. To reduce or elimate the condensation, you may want to paint the walls with waterproof paint and/or run a dehumidifier or two down there.

Can I purchase 5 sheets and have it shipped to my home since this is not available 100 miles with...

Asked by Dee December 7, 2016
1
Answer

Thank you for your recent inquiry with The Home Depot, Dee. This Foam Insulating Sheathing is only carried in select Home Depot stores and not online. If they are not carried in your store, a specialist in your store may be able to special order them for you. Special orders are not available online. We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot.

I have a work/storage shed 14'x24' that's about 24"+ off the ground standing on piers. Living in south Louisiana

Asked by Nukem December 3, 2016
1
Answer

Dear Nukem: Yes, but 1" XPS (Foamular 250) foam board would be a better choice. It provide R-5 per inch of thickness. See: Foamular Model # 86BG, Home Depot Internet #100320343 Store SKU #465124 Store SO SKU #192627 As you noted, screw or nail the foam board to the bottom of your floor joists. Carefully seal all of the edges and joints to block air leaks. DAP 230 works well for small gaps. The 'Window and Door' version of Great Stuff foam is good for larger gaps. Foam board is flammable and should never be installed near any source of heat, e.g. a furnace or vent. Use Roxul ComfortBoard or ComfortBatt near sources of heat. Have you also insulated the roof of your shed? This is much more important for temperature control than the floor. 2" thick XPS foam board would be a good choice here as well. It must be covered by 1/2" drywall, however, for fire safety. I hope this is helpful, Mark

3/4 in. x 4 ft. x 8 ft. R-2.89 Foam Insulating Sheathing - page 2

Customer Reviews

  • 17 Customer Reviews
  • 4.5 out of 5 stars overall
100% of customers recommended.
Overall Ratings
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easy installed using for soundproofing in vocal booth
easy installed using for soundproofing in vocal booth
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3
0
Used between furring strips
Quality :
5
Value :
4
I didn't use this over sheathing but in my 1950s furring strip on cinder block home. With the furring strips, there is not much room for insulation but when I re-modeled the bathroom, this 3/4" thick insulation fit great in between the cinderblock, furring strips and drywall. It doesn't have much R value but anything helps in my cold house. Ive noticed a slight different in insulation. I used a utility knife to cut up. The foam is messy despite how sharp your blade is.
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3
0
San Jose CA
Great for blocking knitted items
Quality :
5
Value :
5
I needed a surface to block knitted items. This board works great. Accepts pins well. Lightweight and rigid, stores vertically.
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11
0
Coulterville, CA, USA
The versatility of this product met my needs amazingly well.
Quality :
4
Value :
5
It was large, it was ridgid, it was light, it was affordable, it was paintable--it was just what I needed for making two backdrop stages for a vacation Bible school. Admittingly it was an aberrant use of foam insulation, but the kids loved it! I peeled off the foil, laid 5 piecies on the ground, drew and painted the scene, then turned them over and connected them with duck tape. Then stood them up.
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39
0
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5 Star Review
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5 Star Review
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Great product. Too bad Home Depot is often out of this particular brand, since they should have m...
Great product. Too bad Home Depot is often out of this particular brand, since they should have more in stock.
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work well
work well
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1
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I acquired this Foam Insulating Sheathing to partition off a portion of a space for the reason of...
I acquired this Foam Insulating Sheathing to partition off a portion of a space for the reason of creating an environment within an environment . It is light weight, and flexible and is sheet sealed to aid with cleaning, and the mirrored silver finish adds a brightness to the overall effect of the micro-environment . I find this product to be simple to work with and highly effective. I am sure that I will buy more in the next 6 months
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