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Internet #100573703

Model #613010

Store SKU #416989

Rmax -3 2 in. x 4 ft. x 8 ft. R-13.1 Polyisocyanurate Rigid Foam Insulation Board

  • Energy efficient
  • For residential and commercial buildings
  • ENERGY STAR approved
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Product Overview

R-Matte Plus-3/Thermasheath-3 is rigid foam plastic thermal insulation board. It's made of environmentally sound, closed cell, polyisocyanurate foam bonded to a durable white-matte (non-glare) aluminum facer and a reflective reinforced aluminum facer. This product is suitable for use in wall sheathing applications in new residential, commercial and agricultural buildings and for thermal retrofit construction to existing buildings. This Energy Star qualified R-Matte Plus-3/Thermasheath-3 provides R13.1 with dimensions of 2 in. x 4 ft. x 8 ft. This product is designed for exterior and interior, non-structural uses.
  • Highest R-Value: thinner profile & higher R-Value than other foam boards
  • Continuous insulation: eliminates thermal bridging through the framing for improving thermal efficiency
  • Air & water-resistive barrier: preventing air infiltration and water intrusion
  • Radiant barrier: white on one side and reflective on the other for universal use
  • Exposure rated: can be used in attics/crawl spaces/interior walls
  • Easy to install: lightweight, durable and easy to handle

  • Click here to learn more about Eco Options and Energy Efficiency
  • How much do you need? Let our calculator help:
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Additional Resources

From the Manufacturer

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Cover Area Per Bag (sq. ft.)
0 ft²
Coverage Area (sq. ft.)
32 ft²
Product Length (ft.)
8 ft
Product Thickness (in.)
2 in
Product Width (in.)
48 in


Compatible Install Surface
Cement,Existing Drywall,Wood
Faced or Unfaced
Insulation Features
Formaldehyde Free
Insulation Location
2x4 Wall,2x6 Wall,Attic,Basement,Ceiling Insulation,Crawlspace,Exterior Sheathing,Garage,Re-Siding
Insulation R-Value
Insulation Type
Foam Board Insulation
Number of Pieces
Pack Size
Product Weight (lb.)
11.5 lb
Sheathing Size
8 ft. x 2 in. x 48 in.
Sheathing Type

Warranty / Certifications

Warranty Information
Standard Warranty

Questions & Answers

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Customer Reviews

  • 5
    out of 1 reviews
  • 100%recommend this product
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This is a easy product to use it cuts well and you can work it down with a wood rasp for a final ...
This is a easy product to use it cuts well and you can work it down with a wood rasp for a final fit. We noticed a improvement right away in how the room that it was used was training heat. We were replacing the underfloor insulation in our bathrooms. Bought more than I needed for other projects!
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  • Recommended
Showing 1-1 of 1 reviews