0719968510017

R-Matte

Model 754404

Internet #100572981

Store SKU #754404

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

$12.25 /each
  • Polyiso foam bonded to reinforced aluminum foil facers
  • Ideal for do-it-yourself applications to add insulation value
  • ENERGY STAR approved

Frequently Bought Together

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 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.

  • 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 transmission through studs
  • Lightweight and easily cut to size

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Customer Questions & Answers

21 Questions16 Answers

Customer Questions & Answers

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

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4 answers

Is this reflective on one side?

This question is from Rmax Plus-3 1/2 in. x 4 ft. x 8 ft. R-3.2 Polyisocyanurate Rigid Foam Insulation Board
Asked by
Layton
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July 6, 2014
Watched youtube. Considering using inside window to reflect heat. Would rather use Renshade, a reflective perforated material but they don't sell it in U.S.
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Answers (4)

Asked by
Port St Lucie, FL
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Home Improvement Profile: DIYer
July 23, 2015
Answer: 
Both sides are aluminum coated; one side IS reflective. I'm re-doing a room and put a couple of these in the window until window treatments go back up. It's my Florida room which always gets warmer than rest of house. Though I got these panels for wall insulation, it does help keep the heat out when put against a window. I'm only using 1/2" (because of the wall" but in front of a window you can get Read More
Both sides are aluminum coated; one side IS reflective. I'm re-doing a room and put a couple of these in the window until window treatments go back up. It's my Florida room which always gets warmer than rest of house. Though I got these panels for wall insulation, it does help keep the heat out when put against a window. I'm only using 1/2" (because of the wall" but in front of a window you can get thicker which will have better effect. If you get it, I used a serrated kitchen knife to cut it, nice and clean. A razor makes a mess! (I also posted a review with some pics if you want to look) Read Less
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Asked by
Michigan
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April 5, 2015
Answer: 
Yes, it has a reflective side, but it's really of poor quality, just look at it from a steep angle and you will see the imperfections from all of the voids under the foil . Try to find the Tuff-R sheating from Dow, if you can find it.
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Asked by
Greenfield, IN
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Home Improvement Profile: Professional
December 17, 2014
Answer: 
It has foil facing on both sides but one side is overprinted with ink so it doesn't look reflective.
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July 21, 2014
Answer: 
It has the silver aluminum foil on both sides. It would work to reflect light and heat if placed inside a window. It wouldn't look very attractive. I'd only use it like that in an area that is not occupied regularly (like an attic or basement area) where you don't care about the appearance or the fact that it will block off the light and make the room darker.
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3 answers

Something wrong

This question is from Rmax Plus-3 1/2 in. x 4 ft. x 8 ft. R-3.2 Polyisocyanurate Rigid Foam Insulation Board
Asked by
Pa
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September 16, 2015
I believe you got the thickness wrong on your page, its only 1/2 inch thick in the specs
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Answers (3)

Asked by
Orlando
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April 14, 2016
Answer: 
The item title states, "Rmax Plus-3 1/2 in. x 4 ft. x 8 ft." so what is "3 1/2 in.? The answer is nothing so this person didn't get it wrong even though it is clarified in the description. The title should be corrected.
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Asked by
D/FW
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Home Improvement Profile: DIYer
December 28, 2015
Answer: 
If you read the description of the product Rmax R-Matte Plus-3 1/2 IN. thinking that it was 3 1/2 inches thick, you misinterpreted the information.
The product is "Rmax R-Matte Plus-3" and it is 1/2 IN in thickness.
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Asked by
Philadelphia
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Home Improvement Profile: DIYer
October 17, 2015
Answer: 
Look a little closer, point 5 = half inch .5=1/2
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2 answers

Is any of this foam insulation fireproof?

This question is from Rmax Plus-3 1/2 in. x 4 ft. x 8 ft. R-3.2 Polyisocyanurate Rigid Foam Insulation Board
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May 2, 2016
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Asked by
Little Rock, AR, USA
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June 8, 2016
Answer: 
Indented Point Number 4 States:
Polyiso rigid foam board offers superior fire protection properties compared to any other rigid foam board insulation.
Interpretation: It is Not Fireproof, but it is Fire Resistant.
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May 4, 2016
Answer: 
No, this insulation is not fireproof.
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2 answers

Sound properties

This question is from Rmax Plus-3 1/2 in. x 4 ft. x 8 ft. R-3.2 Polyisocyanurate Rigid Foam Insulation Board
Asked by
Arlington, TX.
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February 29, 2016
Does this foam board offer any sound deadening properties when installed on the interior behind sheetrock?
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Answers (2)

Asked by
Little Rock, AR, USA
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June 8, 2016
Answer: 
It is good to help keep out sounds from one room to another, but if you are wanting a
"Studio Grade Soundproof Room" go to youtube and search "How to Soundproof a Room".
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March 1, 2016
Answer: 
Polyisocyanurate rigid foam is highly effective for soundproofing.
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Customer Reviews

Rated 3.6 out of 5 by 17 reviewers.
Rated 5.0 out of 5.0 by Good product Reading reviews of others' problems with this product, I wanted to go with GAF. Unfortunately it was not available and I had a time constraint and couldn't wait; I got the Rmax. Don't use a razor, you'll make a mess, doesn't cut well at all with razor. Can't score and snap either. Looked for alternatives; hand saw didn't work (some have said a circular saw worked - didn't try it), sharpened putty knife etc. didn't work. Nothing worked well till I tried a 9" serrated kitchen knife. Works like a charm! Clean cuts, very little mess Also, Rmax must have listened to quality complaints because I had no voids. They were square with consistent thickness. R value of 3.2 for 1/2", not bad at all. This also works well laid in front of a window. I helped cut down the heat till I could put window treatments back up. This product worked well for me, easy to work with, stayed flat, quality was good. Product is made in U.S.A. so shouldn't have to worry about toxic foreign products. July 23, 2015
Rated 5.0 out of 5.0 by Garage Door insulation I used this product as a garage door insulation. Installed it on each door panel cut to fit with the foil side facing outward. Must install it on some type of standoff, I used 1 inch pink foam board strips I cut and glued to the door panels, then put this over them leaving an air gap between the foil side of the R-Max panel and the door panel. What a huge difference this makes in the temps inside the garage. My garage door faces south-southeast so it gets very hot and makes the garage hot too. Not anymore. Great product and easy to work with. I added a bubble radiant barrier to the inside as well to keep heat in in the winter too. June 19, 2011
Rated 1.0 out of 5.0 by Terrible condition Product is a good product. Took 2 trips to get product in useable condition. June 16, 2015
Rated 5.0 out of 5.0 by Great for unconventional Use I used this insulating board as a lightweight frame for a cornice as a DIY project. A cornice is a sturdy valence type top for drapery. I simply wrapped fabric around the board and mounted to the wall. The board was lightweight and easy to use. I used standard everyday pins to hold the board and edges together with glue as well. Using this board as opposed to wood saved me significant money and time. Best of all, required no special tools. December 9, 2014
Rated 1.0 out of 5.0 by Worst Product Ever I bought this product to use in my garage. It's made with expanded foam pellets and when you cut the sheet the pellets come apart and you can't make a straight cut, they break apart and you can't get a nice edge. Also, the pellets that fall, cling to everything, it makes for a messy clean up. DO NOT BUY THIS PRODUCT !!!!!!!!! November 8, 2014
Rated 4.0 out of 5.0 by Stuff is easy to work with I purchased this insulation to put behind paneling in an attempt to sound proof my office in my shop, so I sandwiched it in between paneling and shelving and it seems to work just fine. Easy to cut, and not as big of a mess as some of the comments said. Cannot use it as a wall though because the screws just fall right through it, but makes for excellent "sandwich" material. Definitely worth it. August 20, 2014
Rated 5.0 out of 5.0 by We used this on an addition. WIthout windows, or even all the metal around the addition, we notice at least a 10 degree temperature difference between inside and outside. This is with no door in place and outside air coming in through that opening. I'm looking forward to seeing how it performs come winter - but with 90+ temps lately - it's nice to walk into that space and work. It was a breeze to install and truly makes a difference. Would recommend to anyone - any extra R value helps in this economy! June 29, 2010
Rated 1.0 out of 5.0 by Extremely poor product! Home Depot replaced the Dow "Tuff-R" polyiso board with this new Thermax product. The Dow board is far superior to the Thermax board and carries an R value of 6.5 per inch as opposed to Thermax's 5.9 per inch. Since they're both priced the same, that's an effective 10% price increase for H-D for the equivalent R value. The Thermax board also delaminates during cutting and sends hundreds of "floaters"(small beads of foam) in the air when it's cut. Very annoying!!(and possibly a health hazard?). I've probably used 300 sheets of Dow Tuff-R over the years but I won't be buying the Thermax board. I've discovered that Menard's carries 3/4", 1" and 1 1/2" polyiso board with an R value of 6.5 per inch at a 10% lower price than the Thermax board. That represents a 20% cost savings for the same R value! Worth the trip to O'Fallon for large purchases. Whoever the HD merchandise genious was who thought this was a good move ought to be questioned at length on this one! February 16, 2014
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