25 PSI EPS Fanfold Underslab Insulation
High-strength EPS fanfold insulation designed for commercial slabs, rebar reinforcement, and heavy load applications. Ideal for garages, shops, agricultural buildings, and high-traffic concrete pours.
When 25 PSI EPS Is Required
25 PSI EPS is specified when slabs will experience higher point loads or repeated traffic. This typically includes commercial buildings, reinforced slabs, and areas where vehicles or equipment will exceed standard residential loads.
Commercial or agricultural buildings
Vehicle or equipment traffic over ~31,200 lbs
High-traffic or load-bearing slab areas
Why Fanfold EPS
Fanfold EPS installs faster than standard 4×8 sheets while reducing seams and handling time.
Unfolds to cover 4′ × 24′ (96 sq ft)
Fewer joints than 4×8 boards
Integrated vapor barrier available
Faster layout on large pours
Not Sure if You Need 15 PSI or 25 PSI?
The correct PSI depends on load, reinforcement, and building use. We’ll help you specify correctly before you order.
Residential vs commercial use
Rebar or wire mesh reinforcement
Vehicle or equipment loads (RVs, tractors, forklifts)
Size of high-traffic slab areas