0719968750017

Thermasheath

Model 787264

Internet #100549260

Store SKU #787264

Rmax Thermasheath-3 1 in. x 4 ft. x 8 ft. R-6 Polyisocyanurate Rigid Foam Insulation Board

$19.47 /each
  • Polyiso foam bonded to reinforced aluminum foil facers
  • Cost effective way to increase a thermal efficiency and R-values
  • ENERGY STAR approved

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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 R-Matte Plus-3/Thermasheath-3 provides R6 with dimensions of 1 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
  • Note: Product may vary by store
  • How much do you need? Let our calculator help:
    Insulation calculator button

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Customer Questions & Answers

22 Questions28 Answers

Customer Questions & Answers

Rmax Thermasheath-3 1 in. x 4 ft. x 8 ft. R-6 Polyisocyanurate Rigid Foam Insulation Board
Rmax Thermasheath-3 1 in. x 4 ft. x 8 ft. R-6 Polyisocyanurate Rigid Foam Insulation Board

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3 answers

Can this be used to insulate a Garage door?

This question is from Rmax Thermasheath-3 1 in. x 4 ft. x 8 ft. R-6 Polyisocyanurate Rigid Foam Insulation Board
Asked by
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October 14, 2015
The question kind of says it all!
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Answers (3)

Asked by
Lake Geneva
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Home Improvement Profile: DIYer
June 30, 2016
Answer: 
I Did! Just ask at the Paint Dept which Liquid Nails Product to use to glue it to either a Wood , Metal or Vynil door.. I also use temp Braces to hold the panels up in place for a Hour..till the Gluing set..
its been 3 yrs and So Far So Good.
my Luqid Nails prduct was for the Foam to a Metal GD.. was the LN- HD for foam adhesive for all surfaces, cost $7 a tube.. but only needed 1 tube of 2" round
Read More
I Did! Just ask at the Paint Dept which Liquid Nails Product to use to glue it to either a Wood , Metal or Vynil door.. I also use temp Braces to hold the panels up in place for a Hour..till the Gluing set..
its been 3 yrs and So Far So Good.
my Luqid Nails prduct was for the Foam to a Metal GD.. was the LN- HD for foam adhesive for all surfaces, cost $7 a tube.. but only needed 1 tube of 2" round spots of Glue every couple of Feet ..
Liquid Nails Model # LN-2000 Internet # 206736831 Store SKU # 1001679080 Liquid Nails Fuze It 9 oz. All Surface Construction Adhesive
You might want to Opt for using a Liquid Can of Glue and a Paint Roller (or Use a Paint brush) for more complete gluing coverage..
I'd ask in the Paint Dept which is best to use for your application.. Read Less
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Asked by
Virginia
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Home Improvement Profile: DIYer
January 23, 2016
Answer: 
In reading the installation instructions for this product, the manufacturers state that the boards must not be left exposed as it could contribute to the spreading of a fire.
"DO NOT leave R-Matte Plus-3 exposed. Polyiso foam is an organic material which will burn when exposed to an ignition source of sufficient heat and intensity and may contribute to flames spreading."
I was hoping to use something Read More
In reading the installation instructions for this product, the manufacturers state that the boards must not be left exposed as it could contribute to the spreading of a fire.
"DO NOT leave R-Matte Plus-3 exposed. Polyiso foam is an organic material which will burn when exposed to an ignition source of sufficient heat and intensity and may contribute to flames spreading."
I was hoping to use something like this product to insulate my garage door as it has panels that are larger than the insulation panels for garage doors. I'd need to custom size the insulation panels.
Can this product be safely used on a garage door? Is there another product that is recommended that can be cut to size? Read Less
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January 16, 2016
Answer: 
Yes, you could use this to insulate a garage door.
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3 answers

What is the best way to cut Thermasheath board?

This question is from Rmax Thermasheath-3 1 in. x 4 ft. x 8 ft. R-6 Polyisocyanurate Rigid Foam Insulation Board
Asked by
Alexandria, VA
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September 20, 2015
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Asked by
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January 31, 2016
Answer: 
Stanley Sharptooth Fine Finish mini-utility saw cuts it like butter.
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Asked by
Lake Geneva
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Home Improvement Profile: DIYer
October 9, 2015
Answer: 
I 've used both a Razor Knife and a Vacum Cleaner to suck up the excess foam particles..
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Asked by
Alexandria, VA
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Home Improvement Profile: DIYer
September 25, 2015
Answer: 
To answer my own question - you can easily cut this stuff with a utility knife, a band saw, a table saw, or a circular saw. It is easy to cut, or you can score it and break it and get a pretty good edge.
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2 answers

Does R-Max need to be covered by 1/2" sheetrock when installed on basement walls?

This question is from Rmax Thermasheath-3 1 in. x 4 ft. x 8 ft. R-6 Polyisocyanurate Rigid Foam Insulation Board
Asked by
Madison WI
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May 30, 2016
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Asked by
Boston, Massachusetts
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Home Improvement Profile: Professional
August 22, 2016
Answer: 
Dear Randy: Yes. Foam board is flammable, emits toxic gas when it burns, and MUST be covered by an approved thermal barrier in any basement, living space, garage or attic storage area. The standard is 1/2" drywall.

If you are installing foam board on concrete basement walls, install a poly vapor barrier first - then the foam board. Seal the gaps and edges of the foam panels with DAP 230 to block air
Read More
Dear Randy: Yes. Foam board is flammable, emits toxic gas when it burns, and MUST be covered by an approved thermal barrier in any basement, living space, garage or attic storage area. The standard is 1/2" drywall.

If you are installing foam board on concrete basement walls, install a poly vapor barrier first - then the foam board. Seal the gaps and edges of the foam panels with DAP 230 to block air leaks. Then build your 2x4 stud wall in front of the foam board. To boost the insulation, also fill the stud bays with Roxul ComfortBatt, which provides R4 per inch.

In addition, read up on how to fire stop your basement - a required step that is often overlooked. Do a search for "How to Firestop Your Basement" by Contractor Kurt - a great resource.

I hope this is helpful,

Mark
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Asked by
Lake Geneva
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Home Improvement Profile: DIYer
June 30, 2016
Answer: 
I would, but I would ask in the Pro Service Desk Dept for what Type of Drywall/Sheetrock ..
You may opt to use the Higher Humidity-Moisture areas- Blue Board type used in Bathrooms, instead ..
Especially if its a Older ( 70's built home ),like mine is..
There are Newer 'Drywall" Products now, vs when I did mine 3 yrs ago..
They also spent the time asking what i was going to use it for, Kind Read More
I would, but I would ask in the Pro Service Desk Dept for what Type of Drywall/Sheetrock ..
You may opt to use the Higher Humidity-Moisture areas- Blue Board type used in Bathrooms, instead ..
Especially if its a Older ( 70's built home ),like mine is..
There are Newer 'Drywall" Products now, vs when I did mine 3 yrs ago..
They also spent the time asking what i was going to use it for, Kind of Basement, age of home, and other Questions.. that saved me $150 vs Hiring a BFP ( Basement Finishing Pro' ) to come out and do the same consulting work ..
As a Result- in my Finished- Heated & A/C Basement.. Added a Portable Dehumidifier with a time to run for 2 hours every 12 hrs., with a Drain line to the Sink. ,( too keep the Humidity level at 30% max..)
that has our Laundry Room , Sump Pump, Well Water Pump, On Demand HWH, Furnance and Kids Play and storeage room ..And with a 6" - Low speed - On for 15 min every 4 hrs., thru- the wall-outside Fresh Air Circulating Fan system , to boost the fresh Air circulation in the Basement.
All thanks to the HD -Pro Desks Team's " Free" Advice! on New Current methods..
That's like talking to the This Old House Guys for Free!
vs paying a Contractor consultant to do the same..! Read Less
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2 answers

Can this product be used for HVAC Ducting?

This question is from Rmax Thermasheath-3 1 in. x 4 ft. x 8 ft. R-6 Polyisocyanurate Rigid Foam Insulation Board
Asked by
Kelseyville, Ca
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December 16, 2015
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Answers (2)

Asked by
Lake Geneva
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Home Improvement Profile: DIYer
June 30, 2016
Answer: 
Sure, if you want to Go thru all the Cutting and Using Liquid Nails adhesive .. Just seal all the Metal Duct's Joints first to eliminate leakage of the Heating/A/C 1st..
Butt, I opted to use a 1" thick , R-5 Foam panel instead.. for my home ductwork ..
I figured out the differnt in the added cost using a thicker foam wasn't worth the additonal insualtion.. and after installing? Did not feel hardly
Read More
Sure, if you want to Go thru all the Cutting and Using Liquid Nails adhesive .. Just seal all the Metal Duct's Joints first to eliminate leakage of the Heating/A/C 1st..
Butt, I opted to use a 1" thick , R-5 Foam panel instead.. for my home ductwork ..
I figured out the differnt in the added cost using a thicker foam wasn't worth the additonal insualtion.. and after installing? Did not feel hardly any Heat loss comming thru the Foam when turned the heat on..
But the ductwork runs under my Floors and In a Insulated -4 Ft High Crawl Space area that stays about 40-50 degrees in winter.. But, I only insulated 3 sides of my Ductwork, leaving the side facing the Flooring, to help heat the moslty wood or tile Flooring in the House. Read Less
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January 24, 2016
Answer: 
Yes, this product is for interior and exterior non-structural uses.
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Customer Reviews

Rated 4.5 out of 5 by 2 reviewers.
Rated 4.0 out of 5.0 by Good product, easy to install. Installs quite easy. Use extra fine tooth wood saw to cut to size. When picking up material from store INSPECT IT for damage to the corners and sides! The do not pay much attention to the fact that this board is quire fragile and it gets damaged easy if mishandled. REMEMBER YOU PAY $20 + TAX A PIECE FOR THIS STUFF! January 27, 2015
Rated 5.0 out of 5.0 by Very light weight and insulates great I used this to insulate my attic access. As soon as you open the door on a cold day you can really tell it's working great. It's super light weight makes it seem like it's not even there when I'm opening the door. I used regular liquid nails to put it up and it's staying very well December 10, 2014
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