FOAMULAR 3/4 in. x 4 ft. x 8 ft. R-4 Tongue and Groove Rigid Foam Board Insulation Sheathing
- Saves energy and resists moisture with limited lifetime warranty
- Tongue and groove board edge to reduce gaps and eliminate drafts
- Strong, lightweight pink foam panels don't require special tools
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Product Overview
A Home is a Fortress
It keeps comfort and safety in - and the other stuff out. Help create the year-round protection every home deserves with proven solutions that work where and when you need them most.
Owens Corning FOAMULAR XPS
FOAMULAR is a rigid insulation board made of extruded polystyrene. XPS for short. Compared to EPS products, FOAMULAR XPS has 25% more insulating power and is 10 times more water resistant.
Choose Above- and Below-Grade Protection
FOAMULAR provides continuous insulating power around the entire home from the foundation to the roofline and all kinds of spaces in between.
Insulating Basement Walls
FOAMULAR is the easy-to-install insulating solution for basement walls. Get added comfort with PINK Fiberglas insulation and finish with drywall board.
Insulating Foundation Walls
FOAMULAR is ideal for insulating exterior foundation walls. Extremely durable, it can withstand up to 15-25 psi and resists common acid soils and decay.
Insulating Under Exterior Siding
FOAMULAR provides a higher R-value per inch than other materials commonly used for exterior wall sheathing.
Also Available in Fanfold
FOAMULAR Fanfold is generally intended for use as a backer board for residing applications and comes in 50-foot sections for a faster install.
Superior Moisture Resistance
Virtually impervious to moisture. FOAMULAR has up to 10X more resistance to water than EPS insulation.
Durable, Yet Flexible
A wide range of compressive strengths –up to 100 psi – to handle heavy loads.
Easy to Cut, Form and Fit
Easy to handle, score, cut and install; no special tools needed.
Outstanding Insulating Properties
High, stable R-value (5 per inch of product thickness) - more than wood fiber, plywood or 1/2” gypsum board.
Sustainable
Foamular is certified to meet indoor air quality standards under the stringent GREENGUARD Gold Certification Program.
Lifetime Guarantee
The only XPS with a limited lifetime warranty that guarantees a minimum 90% of R-value for the life of the product.
FOAMULAR Extruded Polystyrene (XPS) Rigid Foam Insulation offers a comprehensive product line of insulation boards in a wide choice of sizes, thicknesses and edges with a Lifetime Limited Warranty for the life of the home or building. Foam insulation boards are easy to handle, score, cut and install & no special tools are needed. Rigid foam insulation products can be used on wood, steel framing or concrete walls. FOAMULAR XPS resists moisture and retains R-value even after exposure to standing water and wet soil. Only XPS foam to be GREENGUARD Gold Certified and the first XPS foam certified by Scientific Certification Systems (SCS) to contain a minimum of 20% recycled content.
- Dimensions: 3/4 in. x 4 ft. x 8 ft.
- Application: exterior above grade walls, underneath vinyl siding/claddings
- Closed cell rigid foam board, designed to resist moisture and helps to block mildew
- Has a higher R-value than wood fiber, plywood or 1/2 in. gypsum board products
- Click here to shop Loctite foamboard adhesive
- Foamular 150 and 250 are available in various thicknesses and R-values, the difference is the compressive strength, foamular 150 has a compressive strength of 15 psi and foamular 250 is 25 psi
- Foamular is not rated for STC (sound transmission) and does not have any soundproofing properties. Owens Corning fiberglass batts and rolls are great options for acoustic applications
- When using foamular or any low perm insulation, always verify the moisture vapor flow and dew point characteristics of the wall system, please check your local building codes for vapor retarder/barrier information
- Being used in an interior construction application, painting the fo is not recommended as foamular cannot be left exposed and will need to be covered by a 15 minute thermal barrier such as drywall
- Being used for crafts, acrylic or latex based paints can be used with foamular products
- You're looking to insulate your garage door, owens corning garage door insulation Kit is an easy, fast and affordable way to keep your garage warm in winter and cool in the summer
- If you’re looking to ventilate your attic rafters, owens corning Raft-R-Mate is a XPS foam vent designed to assure unrestricted airflow from the soffit to the ridge vent
- Foamular is available in 2 edge configurations
- Square edge - designed to fit flush next to adjoining boards
- Scored square edge - comes with 3 factory scores, so that you can take a 4 ft. sheet, break it in 2 and have two, 2 ft.wide sheets (middle score) or you can break it into three 16 in. wide pieces by snapping at the left and right score
- Click here to shop Owens Corning Foam Board Insulation styles
- Click here to shop loctite foamboard adhesive
- Click here to learn more about Eco Options and Energy Efficiency
Compare Similar Foam Board Insulation
 |  |  | | |
| Brand | Owens Corning | STYRO Industries | STYRO Industries | Owens Corning |
| Name | FOAMULAR 1/2 in. x 4 ft. x 8 ft. R-3 Square Edge Rigid Foam Board Insulation Sheathing | FP Ultra Lite 1 in. x 2 ft. x 4 ft. Earthtone Brown Foundation Panel | FP Ultra Lite 1.5 in. x 2 ft. x 4 ft. Stucco Grey Foundation Panel | FOAMULAR 3/4 in. x 4 ft. x 8 ft. R-4 Tongue and Groove Rigid Foam Board Insulation Sheathing |
| Price | $2800 | $2802 | $2861 | |
| Ratings | (173) | (25) | (46) | (18) |
| Product Thickness (in.) | 0.5 in | 1 in | 1.5 in | 0.75 in |
| Insulation Location | Exterior Sheathing | Exterior Wall Foundation | Exterior Wall Foundation | Exterior Sheathing |
| Insulation R-Value | R3 | R5 | R7.5 | R4 |
| Faced or Unfaced | Faced | Faced | Faced | Faced |
| Insulation Features | Formaldehyde Free | Mold Resistant,Paintable,Water Resistant | Mold Resistant,Paintable,Water Resistant | Formaldehyde Free |
| Pack Size | 4 | 1 | 1 | 1 |
| Sheathing Type | XPS | XPS | XPS | XPS |
| Compatible Install Surface | Plywood,Wood | Cement,Concrete,Existing Insulation | Cement,Concrete,Existing Insulation | Concrete,Wood |
| Product Length (ft.) | 8 ft | 2 ft | 2 ft | 8 ft |
| Product Width (in.) | 48 in | 48 in | 48 in | 48 in |
| View Product | View Product | View Product | View Product |
Specifications
Dimensions
| Cover Area Per Bag (sq. ft.) | 32 ft² | Coverage Area (sq. ft.) | 32 ft² |
|---|---|---|---|
| Product Length (ft.) | 8 ft | Product Thickness (in.) | 0.75 in |
| Product Width (in.) | 48 in |
Details
| Compatible Install Surface | Concrete,Wood | Faced or Unfaced | Faced |
|---|---|---|---|
| Insulation Features | Formaldehyde Free | Insulation Location | Exterior Sheathing |
| Insulation R-Value | R4 | Insulation Type | Foam Board Insulation |
| Interior/Exterior | Exterior | Number of Pieces | 1 |
| Pack Size | 1 | Product Weight (lb.) | 3.9 lb |
| Sheathing Size | 8 ft. x 0.75 in. x 48 in. | Sheathing Type | XPS |
Warranty / Certifications
| Warranty Information | Limited Lifetime |
|---|
Questions & Answers
Typical questions asked about products:
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Customer Reviews
Oct 31, 2018
The Owens Corning foam board was easy for one person to install and will serve is it's purpose we...
The Owens Corning foam board was easy for one person to install and will serve is it's purpose well considering the second has no insulation.
by
Dec 8, 2020
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by
Nov 12, 2020
The insulation was cut and used for residing my house. Easy to cut and nail and the shingle shak...
The insulation was cut and used for residing my house. Easy to cut and nail and the shingle shake siding went nicely over the insulation.
by
May 6, 2020
Easy to install__-- high R factor for only being 3\4"...worked...
Easy to install__-- high R factor for only being 3\4"...worked for me!
by
Oct 10, 2019
Great product. I've used almost every size they offer for...
Great product. I've used almost every size they offer for various projects. Only one i buy because it's always the Right one to use. Period.
by
May 21, 2019
The insulation was so easy putting up the ceiling...look great...
The insulation was so easy putting up the ceiling...look great...
by
Oct 25, 2018
Worked exactly as expected. Cuts well, no residual dust. Would...
Worked exactly as expected. Cuts well, no residual dust. Would use again.
by
Sep 18, 2018
its far better than the green board
its far better than the green board
by
May 29, 2018
Work good for basement walls
Work good for basement walls
by
Aug 23, 2016
Did the job!
Easy to cut and install. Priced well. Performed as expected.
by
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