Building Products Plain EPS Insulation

Poly Panel

Cellofoam Poly Panel is an insulation board that may significantly reduce energy costs by adding R-value to your interior, unfinished, basement walls. Poly Panel was specifically designed many years ago (note retro marketing image) for applying directly to basement wall concrete masonry between standard 2 x 4 studs on 16-inch centers or nominal 2-inch furring strips and is still commonly used today to lower heating bills. Each package of Poly Panel contains six sheets of ¾” x 14 ½” x 48” insulation. When installed between 2 x 4 studs or nominal 2-inch furring strips, one package will cover 32 square feet. Poly Panel is sold through several distributors including The Home Depot®.

Cellofoam Poly Panel is made of premium expanded polystyrene (EPS) rigid insulation that meets or exceeds the requirements of ASTM C578, Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation. The EPS is composed of closed cells with excellent dimensional stability, compressive strength, and water resistance.

Photo of package of Poly Panel EPS insulation
Common installation diagram for Poly Panel EPS insulation
Retro sketch of installation of Poly Panel EPS insulation

Advantages

Cost Savings

EPS reduces energy costs and offers the highest R-value per dollar of any foam insulation board. Poly Panel is lightweight and easy to install with adhesive or a friction fit.

Code Approvals

Underwriters Laboratory Listed, UL ER7260, for interior and walls. Please consult local building codes for system requirements and modern basement moisture management building techniques. Insulation must be separated from living areas by an approved thermal barrier of 0.5-inch gypsum wallboard or equivalent.

Stable R-value

A single layer of Cellofoam Poly Panel contributes an R-value of 2.9 at 75o F and 3.1 at 40o F. The R-value of EPS is permanent because the only gas in EPS is air. Unlike Polyiso or XPS whose blowing agents outgas and therefore lose R-value, EPS R-values do not degrade over decades of use.

Moisture Resistant

Cellofoam EPS is quick drying and does not readily absorb moisture from the air. Its closed-cell structure reduces the absorption and migration of moisture. Not a vapor barrier.

Premium Quality

Meets or exceeds ASTM C578 specifications. When properly installed it does not deteriorate with age, and is resistant to mildew, rot, fungus, and bacteria.

Environmentally Friendly

Cellofoam EPS contains no formaldehyde or ozone-depleting CFCs or HCFCs. It is 100% recyclable and may contain recycled material.

Size

Each package of Poly Panel contains six sheets of ¾” x 14 ½” x 48” insulation. When installed between 2 x 4s or nominal 2-inch furring strips, one package will cover 32 square feet. A narrower width 13 5/8” variation may be special ordered for 4-inch nominal framing at 16” centers.

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Protect what matters most

We’re dedicated to manufacturing products that meet the highest standards of quality and performance. Need to know if Cellofoam’s products are right for your next project? Reach out to our team.