0732813100065

R-Tech

Model 310873

Internet #202530470

Store SKU #483214

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

$12.48 /each
  • Numerous household, hobby and construction uses
  • Easy to cut-to-size and to install
  • Poly-facer provides excellent durability & flexibility

Frequently Bought Together

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.

  • Specifically developed for wall sheathing, siding underlayment and basement and foundation insulation
  • 8 ft. length can be 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.

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents.  Download a free copy from the Adobe Web site.

Specifications

Dimensions

Details

Warranty / Certifications

More Products With These Features

Search

Customer Questions & Answers

62 Questions94 Answers

Customer Questions & Answers

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

Ask your questions. Share your answers.

 
 
Clear Search Term
 
 
Sort By:
 
4 answers

What side should the reflective side face, towards outside or inside?

This question is from 3/4 in. x 4 ft. x 8 ft. R-2.89 Foam Insulating Sheathing
Asked by
SLC
Read all my Q&A
March 26, 2016
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0

Answers (4)

Asked by
pittsburgh, PA
Read all my Q&A
Home Improvement Profile: DIYer
June 19, 2016
Answer: 
It depends on whether the application is from the inside or the outside. If you're applying it as outside sheathing to be covered than the mylar faces inside if you are applying against basement block walls than the mylar faces away from the interior.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
Massachusetts
Read all my Q&A
Home Improvement Profile: Professional
April 28, 2016
Answer: 
Dear JM: The foil side should face toward the source of radiant heat -- e.g. a hot metal roof. A few key points:
> Reflective surfaces are only effective in summer, e.g. to reflect radiant energy from a hot roof. Cold cannot be 'reflected' and warm air in your home is not radiant. So unless you are trying to insulate a hot roof, the reflective surface will make little difference. In most applications, Read More
Dear JM: The foil side should face toward the source of radiant heat -- e.g. a hot metal roof. A few key points:
> Reflective surfaces are only effective in summer, e.g. to reflect radiant energy from a hot roof. Cold cannot be 'reflected' and warm air in your home is not radiant. So unless you are trying to insulate a hot roof, the reflective surface will make little difference. In most applications, almost all of the insulation R value is provided by the thickness of the foam.
> You must also create / build a sealed air pocket on the reflective side, e.g. a ~1/2" gap under the roof. Seal all of the edges and seams carefully to block air leaks. Great Stuff foam works well.
I hope this is helpful.
Mark Read Less
+2points
2out of 2found this answer helpful.
Was this helpful?helpful2unhelpful0

Asked by
Ravenna, Ohio.
Read all my Q&A
Home Improvement Profile: DIYer
April 10, 2016
Answer: 
I doubt it matters much. However, I would recommend that used on the interior it should face toward the inside. If used on the exterior it should face the outside.
0points
2out of 4found this answer helpful.
Was this helpful?helpful2unhelpful2

March 27, 2016
Answer: 
The reflective coating faces outward.
+3points
3out of 3found this answer helpful.
Was this helpful?helpful3unhelpful0
 
4 answers

can i glue this product

This question is from 3/4 in. x 4 ft. x 8 ft. R-2.89 Foam Insulating Sheathing
Asked by
ny
Read all my Q&A
January 6, 2016
want to add some insulation on inside of garage door can i glue these panelsto it
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0

Answers (4)

Asked by
Ravenna, Ohio
Read all my Q&A
Home Improvement Profile: DIYer
April 8, 2016
Answer: 
We used liquid nails to sucure it to painted block basement wall. It was held in place to dry and still fell off after dry. The liquid nails adhesive pulled right off the foil side.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
Minnesota
Read all my Q&A
Home Improvement Profile: Professional
March 4, 2016
Answer: 
The R-TECH insulation may be fully adhered using a typical urethane (tube) adhesive that is compatible with Expanded Polystyrene. Insulfoam has a technical bulletin pertaining to suitable adhesives and sealants.
+1point
1out of 1found this answer helpful.
Was this helpful?helpful1unhelpful0

Asked by
pittsburgh, PA
Read all my Q&A
Home Improvement Profile: DIYer
January 11, 2016
Answer: 
yes, You can use liquid nails heavy duty construction adhesive on either side of the panels. no damage to the skin on either side of the insulation. There are adhesives that are designed for polyethylene products if you are planning on gluing the non coated sides however. But for larger panel applications that would be minimal.
+4points
4out of 4found this answer helpful.
Was this helpful?helpful4unhelpful0

Asked by
pittsburgh, PA
Read all my Q&A
Home Improvement Profile: DIYer
January 11, 2016
Answer: 
yes, You can use liquid nails heavy duty. Both sides of the product are covered in a plastic sheathing. Although Liquid nails heavy duty construction adhesive says not to use on plastic, it' has been tried and works well when I did this. DOES NOT deform the board.
+7points
7out of 7found this answer helpful.
Was this helpful?helpful7unhelpful0
 
3 answers

fire rating question; can i leave it exposed in basement per typical residentail code?

This question is from 3/4 in. x 4 ft. x 8 ft. R-2.89 Foam Insulating Sheathing
Asked by
portland maine
Read all my Q&A
May 27, 2016
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0

Answers (3)

Asked by
pittsburgh, PA
Read all my Q&A
Home Improvement Profile: DIYer
June 19, 2016
Answer: 
This product is not fire rated nor can it be used exposed to any kind of Open Flame Source it would not pass code for a basement insulation without drywall over top of it
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
Massachusetts
Read all my Q&A
Home Improvement Profile: Professional
June 11, 2016
Answer: 
Dear Enzo1820: As the R-Tech rep noted, foam board MUST be covered by an approved "thermal barrier" in any occupied room, basement, garage, storage area, etc. -- because foam board is very flammable and emits very toxic gas when it burns. The standard "thermal barrier" is 1/2" drywall. Exposed foam board would be a major fire hazard and code violation.

If you are upgrading your basement, also read up
Read More
Dear Enzo1820: As the R-Tech rep noted, foam board MUST be covered by an approved "thermal barrier" in any occupied room, basement, garage, storage area, etc. -- because foam board is very flammable and emits very toxic gas when it burns. The standard "thermal barrier" is 1/2" drywall. Exposed foam board would be a major fire hazard and code violation.

If you are upgrading your basement, also read up on fire blocking, which is also required by code. Fire blocking must be installed along the top of basement walls, every ten feet along the wall, around any penetrations for pipes or electric lines, etc. Do a Web search for "How to Firestop Your Basement" by Contractor Kurt -- a great resource. Home Depot sells all of the products you will need to install firestopping.

I hope this is helpful.

Mark
Read Less
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

May 31, 2016
Answer: 
No. This is not an approved application. The R-Tech should not be left exposed in a basement application per most residential codes.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0
 
3 answers

the manufacturer recommends " minimum 6d ring-shank nails and 15⁄16" diameter plastic washers ". Can you identify those washers ?

This question is from 3/4 in. x 4 ft. x 8 ft. R-2.89 Foam Insulating Sheathing
Asked by
Read all my Q&A
May 25, 2016
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0

Answers (3)

Asked by
pittsburgh, PA
Read all my Q&A
Home Improvement Profile: DIYer
June 19, 2016
Answer: 
Those are the same washers used for hammering down roof sheathing or securing underlayment such as housewrap etcetera
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Asked by
Massachusetts
Read all my Q&A
Home Improvement Profile: Professional
June 11, 2016
Answer: 
Dear Bobbo: Do a search for "round cap roofing nail" on the Home Depot website.

It would be smart to add a much thicker layer of foam board, however, to increase the R value. We always use a minimum of 2". XPS and polyiso foam board also provide a higher R value per inch. Both are stocked and sold by Home Depot, e.g. Owens Corning Model # 52DD, Home Depot Internet # 202085962 Store SKU # 307101. We
Read More
Dear Bobbo: Do a search for "round cap roofing nail" on the Home Depot website.

It would be smart to add a much thicker layer of foam board, however, to increase the R value. We always use a minimum of 2". XPS and polyiso foam board also provide a higher R value per inch. Both are stocked and sold by Home Depot, e.g. Owens Corning Model # 52DD, Home Depot Internet # 202085962 Store SKU # 307101. We prefer XPS over polyiso for roof and exterior applications because it does not absorb water. Polyiso does.

Also note that all foam board products are very flammable. This is important during installation when the foam board is exposed. If foam board is installed inside any home, basement, garage, storage area, etc. it must be covered by a thermal barrier. The standard is 1/2" drywall.

I hope this is helpful.

Mark
Read Less
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

May 31, 2016
Answer: 
These are roof cap fasteners and should be sold at THD
+1point
1out of 1found this answer helpful.
Was this helpful?helpful1unhelpful0
2 3 4 »
  • 2016-08-27 T16:14:00.240-05:00
  • bvseo_lps, prod_bvqa, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasquestionsanswers
  • loc_en_US, sid_202530470, prod, sort_default
2 3 4 »
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 76ms
  • QUESTIONS, PRODUCT

Customer Reviews

  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 69ms
  • REVIEWS, PRODUCT
  • bvseo-msg: The resource to the URL or file is currently unavailable.;