Model # W-N5075X

Internet #100317820

Store SKU #464947

R-Matte Rmax R-Matte Plus-3 3/4 in. x 4 ft. x 8 ft. R-5 Polyisocyanurate Rigid Foam Insulation Board
0719968530015

R-Matte

Rmax R-Matte Plus-3 3/4 in. x 4 ft. x 8 ft. R-5 Polyisocyanurate Rigid Foam Insulation Board

Product Overview

R-Matte Plus-3/Thermasheath-3 is rigid foam plastic thermal insulation board composed 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 R5 with dimensions of .75 in. x 4 ft. x 8 ft. This product is designed for exterior and interior, non-structural uses.
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Frequently Bought Together

Product Overview

R-Matte Plus-3/Thermasheath-3 is rigid foam plastic thermal insulation board composed 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 R5 with dimensions of .75 in. x 4 ft. x 8 ft. This product is designed for exterior and interior, non-structural uses.
  • Rmax Polyiso sheathing offers the GREATEST R-value per inch currently available in a rigid foam board
  • R-Matte plus-3/Thermasheath-3 is applied to the exterior or interior face of wood or metal studs to cover all studs, sills, plates and header constructions, thereby providing insulation over areas not normally covered by insulation products.
  • Superior resistance to moisture and vapor in above grade applications.
  • Polyiso rigid foam board offers superior fire protection properties compared to any other rigid foam board insulation
  • Energy Star qualified to meet or exceed federal guidelines for energy efficiency for year-round energy and money savings
  • When taped and flashed, the Rmax Polyiso board greatly reduces air infiltration and prevents thermal bridging caused by heat and cold tranmission through studs
  • Lightweight and easily cut to size
  • How much do you need? Let our calculator help:
    Insulation calculator button

Product Overview

Model #: W-N5075X
Sku #: 464947
Internet #: 100317820

R-Matte Plus-3/Thermasheath-3 is rigid foam plastic thermal insulation board composed 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 R5 with dimensions of .75 in. x 4 ft. x 8 ft. This product is designed for exterior and interior, non-structural uses.

  • Rmax Polyiso sheathing offers the GREATEST R-value per inch currently available in a rigid foam board
  • R-Matte plus-3/Thermasheath-3 is applied to the exterior or interior face of wood or metal studs to cover all studs, sills, plates and header constructions, thereby providing insulation over areas not normally covered by insulation products.
  • Superior resistance to moisture and vapor in above grade applications.
  • Polyiso rigid foam board offers superior fire protection properties compared to any other rigid foam board insulation
  • Energy Star qualified to meet or exceed federal guidelines for energy efficiency for year-round energy and money savings
  • When taped and flashed, the Rmax Polyiso board greatly reduces air infiltration and prevents thermal bridging caused by heat and cold tranmission through studs
  • Lightweight and easily cut to size
  • How much do you need? Let our calculator help:
    Insulation calculator button

Info & Guides

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Specifications

Dimensions

Product Depth (in.)
0.75
Product Height (in.)
96
Product Length (ft.)
8 ft
Product Thickness (in.)
.75 in
Product Width (in.)
48

Details

Insulation Application Type
2x4 Walls,2x6 Walls,Attics,Basements,Ceilings,Crawlspaces,Exterior Sheathing,Garage,Re-Siding
Insulation R-Value
5
Insulation Type
Sheathing
Interior/Exterior
Exterior
Product Weight (lb.)
7lb
Sheathing Type
ISO
Structural
No

Warranty / Certifications

Warranty Information
Standard Manufacturers Warranty

Specifications

Dimensions

Product Depth (in.)
0.75
Product Height (in.)
96
Product Length (ft.)
8 ft
Product Thickness (in.)
.75 in
Product Width (in.)
48

Details

Insulation Application Type
2x4 Walls,2x6 Walls,Attics,Basements,Ceilings,Crawlspaces,Exterior Sheathing,Garage,Re-Siding
Insulation R-Value
5
Insulation Type
Sheathing
Interior/Exterior
Exterior
Product Weight (lb.)
7lb
Sheathing Type
ISO
Structural
No

Warranty / Certifications

Warranty Information
Standard Manufacturers Warranty

Questions & Answers

Will this need to be replaced if it is exposed to rain during home construction ?

Will this need to be replaced if it is exposed to rain during home construction ?
Asked by: rojukwe
No. will not absorb moisture.
Answered by: Don1
Date published: 2017-05-11

Can this be used for the walls of a storage room inside the attic without anything covering it?

We have a door on the 2nd floor of our house that leads into an unfinished attic. I want to create a small storage room just inside that door (9' x 8' x 6') with a door on the back side leading into the rest of the large attic space. These foam panels would be nailed over existing sheetrock on three walls (the front wall that the existing door is in, plus the left and right side walls), but two sides of this new storage room (rear wall and ceiling) would be made only of these foam panels, which would be nailed to new 2x4 framing. I read that this foam insulation is meant to be under sheetrock or plywood as I understand it. Would leaving these two sides of this new room as standalone foam panels only, with no sheetrock, create a fire hazard and/or violate the fire code?
Asked by: Mike
Board has a listed flame spread and rating in the data sheet online. If used WITH 1/2 fire approved gypsum, i do not believe it violate fire code. Stand alone it would not meet most fire codes. Note, a fire retardant paint may be painted over board to achieve fire resistance, but may not be approved by code inspector.
Answered by: Don1
Date published: 2017-02-21

can I use this for the ceiling of an outdoor shed?

I am using the shed for storage and some light assembly work. It has a pitched roof and I wouldn't be covering the insulation with drywall.
Asked by: aapone
I did. it worked
Answered by: Don1
Date published: 2017-02-21

can you use on top of concrete floor with sleepers?

I want to insulate floor of office in corner of garage. Plan to build sleeper floor. Will this work in this application?
Asked by: TCStevieD
I beg to differ with the other answer, I think you *can* use it to insulate a floor. I've insulated many floors with rigid foam insulation with a compressive strength of only 15 psi (including in my own home), and this product is 20 psi, which is even stronger. You just can't use sleepers, and I don't know why you'd do that anyway, since it seems old school. If you lay plywood directly on the foamboard, which you should, then you distribute the weight across the whole surface. But with sleepers, the weight would be concentrated where the 2x4s make contact with the foam. Assuming you're installing at-grade, your stackup would be your concrete slab, then a layer of silicone paper as a moisture barrier, then your foam, then 3/8" or thicker plywood (run in the opposite orientation of the foamboard), then a second layer of 3/8" or thicker plywood installed diagonally, and screwed to the first layer, then padding and finish flooring. If that subfloor is too bouncy for your tastes, you can use a rotary hammer to drill some holes into the slab and secure your subfloor with concrete screws like Tapcon. Let's do the math: For a 300-lb. person, with one foot being 8.5" x 3", that's 300 ÷ (8.5 x 3) = 11.8 lbs. per square inch. So, this person could walk directly on the 20 psi foam, but in fact you'll have plywood on top of it which will distribute the load.
Answered by: Godzilla
Date published: 2016-04-15
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Customer Reviews

Rmax R-Matte Plus-3 3/4 in. x 4 ft. x 8 ft. R-5 Polyisocyanurate Rigid Foam Insulation Board is rated 4.9 out of 5 by 12.
Rated 5 out of 5 by from very light and easy to install... very light and easy to install
Date published: 2017-08-22
Rated 5 out of 5 by from R-Matte Drops Attic Temp 20 Degrees Last summer I determined to do something to lower our electric bill. Several options would serve to better insulate and lower the heat transfer into the house. But the best idea seemed to prevent the heat from getting into the attic in the first place. I needed more insulation over the joists and we needed new insulation over the metal duct work on our 30 year old home. If the attic can be made cooler, then it would transfer through the AC ducts and through the ceiling. I purchased 5 to 10 R-Matte boards at a time and secured them to the under side of the roof rafters. In most cases the end of the 8 foot foam boards met on a rafter. Sometimes I cut a few inches off or even added a 2x3 board to one side or the other of the rafter and secured them. I used 2" wood screws and a 1" plastic washer from roof shingle nails. Previously the attic would get 120 or more and now stays in the mid 90's. The AC use to run most of the time and when we use it, cycles on and off quickly. You must have good sofit ventilation and in our case we have ridge vents. The roof decking gets hot and the air below must have a free flow to carry the heat out. This summer I am adding a secondary vent to our porch area because the attic now needs air flow in and out since the foam boards have isolated the soffits from the attic. R-Matte is the way to go. If you can do it yourself, do a little each week and enjoy a cooler home.
Date published: 2009-04-28
Rated 5 out of 5 by from easy to use Several rooms of our 2-story house have walls that are exposed to attic space on the back side. In several locations, the fiberglass batts had drooped from between the studs, leaving the backside of the drywall exposed to extreme hot and cold of the attic. I used this product to provide a rigid support to hold the fiberglass in place between the studs, as well as adding an additional R-5 on the attic side of the wall. It's easy to cut to end on studs or fit odd shapes with a household razor or sharp knife. I attached with roofing nails (with plastic washers) across the attic side of the studs. This product is lightweight, so few nails are needed. Note: this product acts as a vapor barrier, which you don't want on the (cold) attic side of the wall. Don't seal the edges to make it airtight or you risk water condensing inside the wall cavity.
Date published: 2010-01-28
Rated 5 out of 5 by from Great stuff I used this product to make an enclosure box for my attic stairs. Just a little something to fit over the attic stairs when they are closed to prevent heat and cooling loss. It worked perfectly. It's very easy to cut with a razor knife and a drywall square. It actually cuts very similar to drywall. It does a great job at insulating too. I notice a huge difference in the surface temperature of my pull down attic stairs. Before when the attic stairs were closed the surface of the stair hatch was hot to the touch, now it is closer to room temperature. not to mention I have less air loss. I will be using this more.
Date published: 2014-07-15
Rated 5 out of 5 by from Works in a deep freezer's door. I have a deep freezer out in the garage. The original insulation of the freezer door collected ice and the old inside hard plastic broke apart. I needed away to insulate the freezer door. Between my brother and I. We came up the idea to us a foam insulation board. So I got the insulation board and cut it to size to fit the inside of the door. Then I use the expanding foam around the edges of the insulation board. The expanding foam (when dried) will hold the insulation board in place and also seals out the moister between the insulation board and the freezer door. It has been over a month now and I have no trouble with the foam insulation board in the freezer door. Also no sweating on the exterior side of the freezer door.
Date published: 2011-10-25
Rated 4 out of 5 by from Rigid Insulation I own a drywall construction business in Florida and this is a great product for use on concrete or c.m.u. walls. It is easy to cut and install and provides good insulation for exterior walls. It also has moisture protection qualities as well as sound deadening qualities. It works great in conjuntion with either 1x2 p.t. furring strips or 7/8" metal hat channels over top of the insulation allowing an air space and creating an overall 1-1/2' thickness to allow for standard electrical box installation on c.m.u. walls without having to break out the block for the boxes or e.m.t. conduit.
Date published: 2010-07-28
Rated 5 out of 5 by from A dream to work with. Insulated shed panels and barn doors in a snap. Can use drywall screws to... A dream to work with. Insulated shed panels and barn doors in a snap. Can use drywall screws to attach to exterior walls.
Date published: 2017-02-21
Rated 5 out of 5 by from Insulate your Garage Door!! Much cheaper than buying the kits. Two layers of this is the perfect thickness. Just cut it slightly oversize, slip the top edge under the lip and then slide the bottom edge down. You could also glue it with spray contact glue. Four sheets was just enough to do one single bay door.
Date published: 2012-06-18
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