Expanded Polystyrene (commonly known as EPS) has become one of the most sustainable modern methods of construction available. Expanded Polystyrene is strong, lightweight, it doesn’t rot, it’s water resistant, and has excellent insulation properties. Expanded Polystyrene is widely used in construction projects ranging from buildings and stadiums, roadways and commercial landscaping.

Poly Molding has been the leading innovator in the construction industry for well over 50 years serving New York, Eastern Pennsylvania, and Connecticut. Our factory is conveniently located in Northern New Jersey, Poly Molding is only 30 minutes from New York City and Long Island. With a large line of insulation products, Poly Molding provides a vast inventory of fully insulated Expanded Polystyrene (EPS) products that fulfills the needs of the commercial market as well as residential homes.

Our timely service and excellent customer relations are the reason why Poly Molding supplies most major distributors and has made us the leader in the Expanded Polystyrene (EPS) insulation industry.

Poly Molding can provide stock sizes but our real passion a is fulfilling the customized needs of our clients.  Tell us about your project and we’ll help find the right EPS application.

EPS sheets

What is Expanded Polystyrene?

Low weight, rigidity, and formability, EPS can be used in a wide range of different applications.

Rigid & Tough

Expanded polystyrene is a rigid foam insulation that is often used under concrete slabs and blocks, as well as in many other below-grade applications. It is lightweight and very durable.

Physical Property Requirements

Up to 60 psi compressive resistance

Meets or exceeds ASTM D6817

Meets or exceeds ASTM C578

Many Uses

Common applications of EPS foam are Geofoam, green roofing, flute fillers and tapered insulation for the commercial roofing industry, precast concrete walls and panels, light weight fill.

Many Sizes

Originating as a 3’ x 4’ x 16’ block EPS can be cut into any custom size including standardized 4’ x 8’ and 2’ x 8’ sheets. Easy to modify on work sites and for creative art projects.

Great Insulation

EPS offers exceptional versatility vs the competition and is used in a wide array of Wall, Floor, Roofing and Geofoam applications as well as in insulated concrete forms and panels.

Cost Effective R-Value

Providing the highest R-Value for the cost vs. XPS & Polyiso at about 4.2 per inch at 75 degrees, EPS foam will keep your costs down while meeting or exceeding all building codes and energy codes.

Water Resistant

Because EPS foam is a closed cell structure it provides for minimal water absorption. Most if not all moisture accrued will remain on the surface and have little effect on thermal performance.

Flame Retardent

Our EPS foam has a flame-spread index of 25 or less and a smoke-developed index of 450 or less, tested in accordance with ASTM E 84.

Green Initiative

EPS foam is free of chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs). EPS is 100% Recyclable. Please contact your local municipality for EPS Recycling services.

Recycled Content

We have the ability to manufacture our EPS foam with up to 30% recycled content allowing us to offer lower costs and more importantly minimize our environmental footprint.

EPS versus XPS

EPS provides a dramatically lower cost/R-value vs. XPS foam and we offer a 100% R-value warranty. Our manufacturing process allows blocks up to 3’ x 4’ x 16’ vs the XPS maximum size of 4” x 4’ x 8’.

EPS versus Polyiso

EPS foam offers significant cost savings vs Polyiso while providing a comparable R-value. Polyiso is also manufactured in limited thickness making EPS particularly appealing- its installation is faster, easier, uses fewer pieces, and needs less cutting.

Why Poly Molding?

What we have helped to build

Read the INC Magazine Profile on Poly Molding


ASTM Stack for Website

Meet the Poly Molding Team

Adam Corn, Owner/CEO

Adam Corn


Following college, Adam spent three years learning the machinery and equipment at Poly Molding Corp. He started the Poly Molding sales department in the mid-1990’s, and over 15 years obtained and solidified the customer base and greatly expanded the Poly Molding Corp.’s territory.

In 2010 Adam purchased Poly Molding Corp. and changed the name to Poly Molding LLC. Although the name has changed, the company still strives to provide the same quality and service as Adam’s grandfather and father did for over 50 years! Adam’s friendly and strong family-oriented disposition is a big reason why he has such loyal customers and is a leader in this business.

Sebastian Williams, Sales Consultant

Sebastian Williams

Sales Consultant

Every company has a jack of all trades and at Poly Molding this person is Sebastian. Sebastian has been in business development for many years and, while at Poly Molding, Sebastian has been instrumental in helping to shape our strategic plan, and streamline our operations, while growing our list of satisfied clients.

Sebastian has also worked closely with geofoam engineers and project managers from inception to completion, supplying geofoam (expanded polystyrene fill) for a number of different applications.

Jo Ann Doty, Office Manager

Jo Ann Doty

Office Manager

In 1999 Jo Ann joined the Poly Molding team and has been the glue for the company. Behind the scenes, Jo Ann is responsible for all office related projects as well as the managing the finances of the company. Even with such a demanding and important role Jo Ann always manages to maintain a happy disposition which spreads throughout the plant whenever she is around.

Shawn Fergeson, Plant Supervisor

Shawn Fergeson

Plant Supervisor

Working at Poly Molding for over 10 years, Shawn is involved in all aspects of manufacturing process from beginning to end! Shawn also maintains the quality control of the product line and enforces/monitors plant safety.

Get In Touch With Us

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Poly Molding LLC

96 Fourth Avenue | Haskell, NJ 07420

Toll Free: 800.229.7161 | Office: 973.835.7161