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1 in. x 48 in. x 8 ft. R-3.85 Insulating Sheathing

  • Easy to cut, split and install
  • Energy Star qualified
  • 1 in. x 4 ft. x 8 ft. R-3.85 Insulating Sheathing
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Product Details

R-Tech 1 in. x 4 ft. x 8 ft. Insulation Sheathing cuts easily to size. Facilitating its installation as wall sheathing, basement and foundation insulation or siding underlayment. This product meets federal guidelines for energy efficiency.
  • Designed for use as wall sheathing, basement and foundation insulation or siding underlayment
  • Energy Star qualified to meet or exceed federal guidelines for energy efficiency for year-round energy and money savings
  • Cuts easily to size to make installation a snap
  • Poly-facer on both sides for flexibility and durability
  • Moisture-resistant design to help maintain a water-tight seal
  • Note: Product may vary by store



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From the Manufacturer

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Specifications

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Questions & Answers

337Questions
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Q:Will this help dampen noise from noisy neighbors?
by|Feb 6, 2023
0 Answer
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Q:Can I use this under crawler joist.
by|Feb 1, 2023
1 Answer
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A:  Yes. If used in crawl spaces, see the Insulfoam code report ESR 1788 pertaining to restrictions.

by|Feb 2, 2023
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    Q:Could this board be used in a camper floor
    by|Jan 28, 2023
    3 Answers
    Answer This Question

    A:  I think you could if you did something like a laminate over it. It's pretty soft Styrofoam so I don't think it would hold up otherwise.

    by|Feb 2, 2023

      A:  I don't see why not

      by|Feb 2, 2023

        A:  Yes. If on interior, you will need to cover with a suitable hardboard.

        by|Jan 30, 2023
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          Q:Is this board good for a ceiling? I need a R30 insulation board. Or do we have to order it special?
          by|Jan 20, 2023
          1 Answer
          Answer This Question

          A:  The R-Value of R-TECH is 3.6 per inch. To achieve a R30 you would need 8.3 inches. Suggest looking at blow cellulose insulation to achieve the R30.

          by|Jan 27, 2023
            Showing 1-4 of 337
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            Customer Reviews

            4.7 out of 5
            (325)
            • 4.7
              out of 325 reviews
            • 96%recommend this product
            Filter by:
            Showing 1-10 of 325 reviews
            Styrofoam was great. I used it to make an art project for my grandson's birthday. It was easy to ...
            Styrofoam was great. I used it to make an art project for my grandson's birthday. It was easy to cut, I used wood burning tool to shape headstones. it absorbed paint easily and didn't soak it in. I was very happy with the purchase, the price and the service at the store. So many photos it was hard to choose.
            by
            • Verified Purchase
            • Recommended
            9 found this review helpful
            Just foam board. Literally you can see light through the...
            Just foam board. Literally you can see light through the insulation, but that’s what you get for the price. If you are wanting a small addition to insulative value and want to save money, these will work for you. I put 1x3 beams over these, anchored to the wall and they held up to the pressure of the board.
            by
            • Verified Purchase
            6 found this review helpful
            I bought four 1"x4'x8' sheets to insulate my South Florida double-car garage door. Each sheet to...
            I bought four 1"x4'x8' sheets to insulate my South Florida double-car garage door. Each sheet took me about 3 hours to measure, cut and install (8 "panels" per sheet). I'm 74 and accomplished the project on my own. Easy to cut and install.
            by
              • Recommended
              17 found this review helpful
              Good product.
              Good product.
              by
              • Verified Purchase
              • Recommended
              2 found this review helpful
              I bought this insulation board to make a cover for...
              I bought this insulation board to make a cover for my desert garden. It includes a small bird bath. It's been in the 20's. Everything outside is frozen yet when I remove the cover from my desert garden even the half in deep bird bath remains unfrozen. I highly recommend for any temperature control
              by
              • Verified Purchase
              5 found this review helpful
              I thought to make a garage door a long time, very hot, sunny side. I was searching online what to...
              I thought to make a garage door a long time, very hot, sunny side. I was searching online what to get better. They sell at least $ 76 on 8 panels, I have 16 panels. I bought R-Tech 1 in. x 4 ft. x 8 ft 4 panels for only $ 70 (used 3.5 panels). It turned out well, it became quieter in the garage, the gates are not rattling, I think the temperature has become lower.
              by
                • Recommended
                6 found this review helpful
                Easy to work with...
                Easy to work with...
                by
                • Verified Purchase
                • Recommended
                2 found this review helpful
                was able to put in my garage door.
                was able to put in my garage door.
                by
                • Verified Purchase
                • Recommended
                Great insulating board. Foil side provides nice appearing surface. Used for insulating lower half...
                Great insulating board. Foil side provides nice appearing surface. Used for insulating lower half of old single pane windows. Storm windows and screen blend with the foil side and drapes hide the R-Tech side. Stops drafty chill. Sheathing is easy to cut. Much stronger than foam panels. Easy to cut with disposable razor knives. After cutting to size the R-Tech covering can be peeled off for a clean white face. A very economical way to insulate old windows. Can be removed to let sun shine in.
                by
                • DIY
                • Verified Purchase
                • Recommended
                17 found this review helpful
                I've purchased this product in the past, to use for insulating windows during the summer in Arizo...
                I've purchased this product in the past, to use for insulating windows during the summer in Arizona and it worked well, but this purchase was for insulating a very thin door on my rental home. I moved into a 55+ mobile home community a year ago and the back door of the home is wafer thin. All last summer I could feel the heat coming through as if there were no door at all. I don't use the back door but maybe once in a blue moon, so I cut a sheet of R-Tech to size (use a very sharp blade to avoid foam fuzzies), finished the edges with duct tape and squeezed it into place (I used a butter knife like a shoehorn). Summer hasn't fully hit yet, but this door faces west and we're into the low 90's now and I feel absolutely zero heat coming through! I know this addition will help me save on my electric bill as the thermostat is only about 10 feet down the hall from this door and my SRP bills were huge last summer. I already had 2 layers of blackout curtains on this door, so the outside set of drapes cover it nicely now. Oh and I cut out a little niche for the doorknob & deadbolt. I've covered this with shelf paper in the past to conceal the text on the insulation and it worked like a charm.
                by
                • Verified Purchase
                • Recommended
                16 found this review helpful
                Showing 1-10 of 325 reviews

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                1 in. x 48 in. x 8 ft. R-3.85 Insulating Sheathing
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                Ratings
                (177)
                (521)
                (218)
                (325)
                Product Thickness (in.)0.5 in1 in2 in1 in
                Insulation R-ValueR3R5R10R3.85
                Insulation LocationExterior SheathingExterior WallExterior Sheathing2x4 Wall,2x6 Wall,Attic,Basement,Crawlspace,Exterior Sheathing,Exterior Wall Foundation,Garage,Under Slab
                Insulation FeaturesFormaldehyde FreeFormaldehyde FreeFormaldehyde FreeStructural
                Faced or UnfacedUnfacedUnfacedUnfacedFaced
                Sheathing TypeXPSXPSXPSEPS
                Pack Size14848
                THD SO SKU192627 1000203202
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