Lightweight, Efficient, and Labor-Saving EPS Fanfold Insulation

EPS Fanfold provides contractors with a cost-effective, code-approved solution designed to reduce installation time and labor costs. Delivered in accordion-style bundles, fanfold panels are lightweight, moisture-resistant, and easy to carry, making them a preferred choice for roofing recover projects and versatile enough for the entire building envelope.
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EPS Data Sheet

What is EPS Fanfold?

Sheets of expanded polystyrene (EPS) insulation joined together and folded into bundles provide an efficient, easy-to-handle insulation product. Each bundle contains 25 dual-sided, polymeric-faced panels measuring 2′ x 4′, unfolding to cover up to 200 square feet. A bundle weighs only about 11 pounds, allowing a single installer to quickly carry and position large areas of insulation. With labor savings of up to 60% compared to individual boards, EPS Fanfold streamlines project schedules while providing consistent thermal efficiency, durability, and moisture resistance.

Roof Recover Projects

Popular for re-roofing applications, fanfold simplifies installation and reduces fastening patterns.

Walls & Siding

Improves energy performance and moisture protection in both residential and commercial wall systems.

Below-Grade Insulation

Provides dependable moisture resistance and long-term durability when used against foundation walls.

Interior Applications

Lightweight and easy to trim on-site, EPS Fanfold is ideal for adding insulation to interior walls during renovations without heavy labor or complex installation.

Basements & Garages

Helps regulate indoor temperature while resisting moisture, mold, and mildew growth.

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Industries Served

Geofoam is used across a wide range of construction applications:

Road & Bridge Construction

Stadium & Theater Seating

Airports & Railways

Retaining Structures

Green Roofs

Custom Projects

Looking for a faster, easier way to install insulation?

EPS Fanfold bundles reduce labor costs and increase efficiency. One installer can carry 400 square feet of fanfold at once compared to just 13 sheets of conventional cover board. With dual-sided polymeric facers and extensive code approvals, EPS Fanfold is suitable for roofing, siding, below-grade, and more.

EPS Fanfold consists of expanded polystyrene panels joined together in accordion-style bundles. Each lightweight bundle unfolds to cover up to 200 square feet, providing fast, efficient installation with excellent thermal performance and moisture resistance.

Because fanfold panels are pre-joined, installers handle far fewer pieces. One bundle replaces 25 individual boards, saving up to 60% in installation time. Reduced fastening patterns and lightweight handling also lower labor costs on job sites.

Yes. EPS Fanfold panels feature dual-sided polymeric facers that provide added water resistance. Unlike alternative cover boards, EPS will not break down or lose performance if exposed to moisture or roof leaks.

Absolutely. EPS Fanfold is widely used for roof recover projects but is also suitable for siding, below-grade foundations, and even interior walls. Its versatility makes it valuable across the entire building envelope.

EPS Fanfold meets ASTM C578 standards and carries UL approvals for numerous roofing and wall receiver applications. These approvals make it a trusted, code-compliant option for both residential and commercial construction.

EPS Fanfold offers significantly better thermal performance — about 8x higher R-value than ½″ gypsum cover boards and 3x higher than ½″ wood fiber boards. It is also lighter, easier to handle, and more moisture resistant than these alternatives.

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Benefits of EPS Fanfold

  • Labor-Saving – Up to 60% faster installation compared to individual panels.

  • Lightweight & Easy to Handle – One person can carry a 200 sq. ft. bundle weighing only 11 pounds.

  • Moisture Resistant – Dual-sided polymeric facers protect against water damage.

  • Versatile Applications – Suitable for roofs, walls, below-grade, and interiors.

  • Superior Thermal Performance – About 8x higher R-value than ½″ gypsum cover boards and 3x higher than ½″ wood fiber boards.

  • Durable & Reliable – Won’t break down like alternative cover boards if leaks occur.

  • Code Approved – Meets ASTM C578 and has UL approvals for multiple receiver applications.