Model # 321354

Internet # 202524151

Store SKU # 285980

Insulfoam 3/4 in. x 2 ft. x 4 ft. R-2.89 Insulating Sheathing

  • Lightweight, easy to use
  • Multiple thicknesses
  • Insulfoam 3/4 in. x 2 ft. x 4 ft. R-2.89 Insulating Sheathing

Frequently Bought Together

Product Overview

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.

  • Designed for use on walls, in basements, as siding underlayment and as foundation insulation
  • Energy Star qualified to meet or exceed federal guidelines for energy efficiency for year-round energy and money savings
  • Cuts easily to make installation a snap
  • Poly-facer on both sides for flexibility and durability
  • Moisture-resistant design to help maintain a water-tight seal
  • How much do you need? Let our calculator help:
    Insulation calculator button

Info & Guides

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



Product Depth (in.) 
Product Height (in.) 
Product Length (ft.) 
4 ft 
Product Thickness (in.) 
.75 in 
Product Width (in.) 


Faced or Unfaced 
Insulation Application Type 
2x6 Walls,Attics,Basements,Crawlspaces,Exterior Sheathing,Exterior Wall Foundation,Garage,Under Slab,2x4 Walls 
Insulation R-Value 
Insulation Type 
Product Weight (lb.) 
0.2 lb 
Sheathing Type 

Warranty / Certifications

ENERGY STAR Certified 
Warranty Information 

More Products With These Features


Customer Questions & Answers

1 Question0 Answers

Customer Questions & Answers

Insulfoam 3/4 in. x 2 ft. x 4 ft. R-2.89 Insulating Sheathing
Insulfoam 3/4 in. x 2 ft. x 4 ft. R-2.89 Insulating Sheathing

Ask your questions. Share your answers.

Clear Search Term
0 answers

How do I instal

This question is from Insulfoam 3/4 in. x 2 ft. x 4 ft. R-2.89 Insulating Sheathing
Asked by
Read all my Q&A
June 19, 2016
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0
1 of 1
  • 2016-07-22 T14:48:04.537-05:00
  • bvseo_lps, prod_bvqa, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasquestions
  • loc_en_US, sid_202524151, prod, sort_default
1 of 1
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 156ms

Customer Reviews

Rated 5.0 out of 5 by 2 reviewers.
Rated 5.0 out of 5.0 by Exactly what we needed Installed in ceiling of enclosed porch. Matched the existing tiles exactly.Since it's made of foam material there was some cleanup from bits that came off. January 20, 2015
Rated 5.0 out of 5.0 by Works well The insulation works well, given that it is only 3/4" thick. The Reflective foil on one side of the insulation really makes a difference and reflects some heat, so that one can go with a thinner piece than one normally would. Easy to cut and to work with. November 12, 2013
  • 2016-07-27 T01:02:04.400-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasreviews, tv_2, tr_2
  • loc_en_US, sid_202524151, prod, sort_default
1-2 of 2
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 113ms