#1 Home Improvement Retailer

Internet #100320340

Model #37L

Store SKU #104863

Store SO SKU #192627

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
  • View More Details
Store
0 in stock
Text to Me
How to Get It

Frequently Bought Together

+
Price:

Product Overview

Home with pink outline and Owens Corning logo

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.

close up of Owens Corning Foamular with water beads

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.

Cutaway image of a house with Foamular installed in different locations

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.

man installing fiberglas insulation  over Foamular

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.

man installing Foamular in exterior foundation application

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.

man installing siding over Foamular

Insulating Under Exterior Siding

FOAMULAR provides a higher R-value per inch than other materials commonly used for exterior wall sheathing.

man installing Foamular fanfold insulation

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.

icon for moisture resistance

Superior Moisture Resistance

Virtually impervious to moisture. FOAMULAR has up to 10X more resistance to water than EPS insulation.

icon for compressive strength

Durable, Yet Flexible

A wide range of compressive strengths –up to 100 psi – to handle heavy loads.

icon for easy to cut

Easy to Cut, Form and Fit

Easy to handle, score, cut and install; no special tools needed.

icon for insulation performance

Outstanding Insulating Properties

High, stable R-value (5 per inch of product thickness) - more than wood fiber, plywood or 1/2” gypsum board.

icon for sustainability

Sustainable

Foamular is certified to meet indoor air quality standards under the stringent GREENGUARD Gold Certification Program.

icon for guarantee

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.
  • Insulation Application: exterior above grade walls, underneath vinyl siding/claddings
  • Closed cell rigid insulation foam boards are highly moisture-resistant and helps to block mildew
  • Rigid foam insulation 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

Additional Resources

From the Manufacturer

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

Compare Similar Foam Board Insulation

FOAMULAR 150 1 in. x 4 ft. x 8 ft. R-5 Scored Square Edge Rigid Foam Board Insulation SheathingFOAMULAR 150 2 in. x 4 ft. x 8 ft. R-10 Unfaced Squared Edge Insulation SheathingFOAMULAR 150 2 in. x 4 ft. x 8 ft. R-10 Scored Squared Edge Rigid Foam Board Insulation Sheathing
current product
FOAMULAR 3/4 in. x 4 ft. x 8 ft. R-4 Tongue and Groove Rigid Foam Board Insulation Sheathing
BrandOwens CorningOwens CorningOwens CorningOwens Corning
NameFOAMULAR 150 1 in. x 4 ft. x 8 ft. R-5 Scored Square Edge Rigid Foam Board Insulation SheathingFOAMULAR 150 2 in. x 4 ft. x 8 ft. R-10 Unfaced Squared Edge Insulation SheathingFOAMULAR 150 2 in. x 4 ft. x 8 ft. R-10 Scored Squared Edge Rigid Foam Board Insulation SheathingFOAMULAR 3/4 in. x 4 ft. x 8 ft. R-4 Tongue and Groove Rigid Foam Board Insulation Sheathing
Price
$2900
$3986
$3986
Ratings
(482)
(13)
(205)
(18)
Product Thickness (in.)1 in2 in2 in0.75 in
Insulation LocationExterior WallBasementExterior SheathingExterior Sheathing
Insulation R-ValueR5R10R10R4
Insulation FeaturesFormaldehyde FreeFormaldehyde FreeFormaldehyde FreeFormaldehyde Free
Faced or UnfacedUnfacedUnfacedUnfacedUnfaced
Sheathing TypeXPSXPSXPSXPS
Pack Size4481
Product Width (in.)48 in48 in48 in48 in
Insulation TypeFoam Board InsulationFoam Board InsulationFoam Board InsulationFoam Board Insulation
Product Length (ft.)8 ft8 ft8 ft8 ft
View ProductView ProductView ProductView Product

Specifications

Dimensions

Cover Area Per Bag (sq. ft.)32 ft²Coverage Area (sq. ft.)32 ft²
Product Length (ft.)8 ftProduct Thickness (in.)0.75 in
Product Width (in.)48 in

Details

Compatible Install SurfaceConcrete,WoodFaced or UnfacedUnfaced
Insulation FeaturesFormaldehyde FreeInsulation LocationExterior Sheathing
Insulation R-ValueR4Insulation TypeFoam Board Insulation
Interior/ExteriorExteriorNumber of Pieces1
Pack Size1Product Weight (lb.)3.9 lb
Sheathing Size8 ft. x 0.75 in. x 48 in.Sheathing TypeXPS

Warranty / Certifications

Warranty InformationLimited Lifetime

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 4.8
    out of 18 reviews
  • 100%recommend this product
Filter by:
Showing 1-10 of 18 reviews
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
  • Verified Purchase
  • Recommended
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by
  • Verified Purchase
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
  • Verified Purchase
  • Recommended
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
  • Verified Purchase
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
  • Verified Purchase
The insulation was so easy putting up the ceiling...look great...
The insulation was so easy putting up the ceiling...look great...
by
  • Verified Purchase
  • Recommended
Worked exactly as expected. Cuts well, no residual dust. Would...
Worked exactly as expected. Cuts well, no residual dust. Would use again.
by
  • Verified Purchase
its far better than the green board
its far better than the green board
by
  • Verified Purchase
  • Recommended
Work good for basement walls
Work good for basement walls
by
  • Verified Purchase
  • Recommended
Did the job!
Easy to cut and install. Priced well. Performed as expected.
by
  • Verified Purchase
Showing 1-10 of 18 reviews