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Internet # 100572981

Model # 754404

Store SKU # 754404

Rmax Plus-3, 1/2 in. x 4 ft. x 8 ft. R-3.2 Polyisocyanurate Rigid Foam Insulation Board

  • Energy efficient
  • For residential and commercial buildings
  • ENERGY STAR approved
  • View More Details
0 in stock
Product Details

About This Product

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 Rmatte Plus-3/Thermasheath-3 provides R3.2 with dimensions of .5 in. x 4 ft. x 8 ft. This product is designed for exterior and interior, non-structural uses.


Product Information

Internet # 100572981

Model # 754404

Store SKU # 754404

Additional Resources



Cover Area Per Bag (sq. ft.)

0 sq ft

Coverage Area (sq. ft.)

32 sq ft

Product Length (ft.)

8 ft

Product Thickness (in.)

0.5 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.)

7 lb

Sheathing Size

8 ft. x 0.5 in. x 48 in.

Sheathing Type


Warranty / Certifications

Warranty Information

Standard Warranty

Questions & Answers

Q:I want to use this on my windows for my garage. If I use these with the reflective side out how bright will the reflection be when sunlight hits it directly? I don't want to annoy/blind my neighbors.
by|Jul 29, 2022
2 Answers
Answer This Question

A:  It could be pretty bright! It's really shiny. Maybe put some tint in between this and the glass.

by|Oct 13, 2022

    A:  They will not complain about the reflection, they might complain that it is ugly.

    by|Dec 9, 2022
      Q:Can this product be used as a base fir art projects?
      by|Apr 13, 2022
      2 Answers
      Answer This Question

      A:  I guess you could but keep in mind it’s insulation. 

      by|Apr 17, 2022

        A:  It is very straight and not bendable. But it is basically like a giant piece of dense styrofoam with paper over it to make it smooth.  You can definitely attach posters or other things to it and stand it. I would not be pressing hard on it because even though it is firm, it is styrofoam.  We draped a large mural over it for display and it worked great. 

        by|Apr 15, 2022
          Q:Will this ever be in stock in 1/2 inch ?? RMAX foam board insulation
          by|Nov 11, 2021
          1 Answer
          Answer This Question

          A:  Hi Frustrated, This is an in store stocked product for Home Depot. If the location near you is out of stock, please feel free to inquire or place a special order at the ProDesk.

          by|Nov 17, 2021
            Q:I have a 15 by 16 ; three season, Eeezy Breese porch, say three feet off the ground. I insulated the ceiling and underneath the deck floor with bat insulation. My question is about the deck floor; insulated between the floor joist with bat insulation BUT would like to install an insulation board to increase the R rating. Question: what type of insulated board should I use?
            by|Feb 2, 2021
            3 Answers
            Answer This Question

            A:  Polyiso has the highest R-value per inch installed. Home Depot, carries R-Matte Plus-3 and Thermasheath. Either will work in this situation but I would recommend at least 1" thickness for increased board stiffness. Once the board is well secured with screws and washers or cap nails, use a construction tape to seal all edges of the board but make sure to use a hard plastic squeegee to firmly press the tape onto the board! This will help reduce air leaks through the assembly.

            by|Feb 3, 2021

              A:  Your insulation technique will depend on many factors including moisture/water permeability. Check with the Pros at Customer Service in your local Home Depot for options and inventory.

              by|Feb 3, 2021

              A:  what rating are you looking for, varies from 1/2" to 3"? you will need to have some vents to prevent humidity build up and mold problems

              by|Feb 3, 2021
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