Product Description
Insulfoam® Commercial Below‑Grade & Under‑Slab EPS Insulation provides factory-cut expanded polystyrene panels designed for foundation walls, slab-on-grade applications, plaza decks, radiant-heated floors, block-outs, landscape void fill, drainage board, cold storage, stadium seating, and more. Engineered for long-term installation, these panels not only insulate but also protect waterproofing and dampproofing systems during backfilling. Installed EPS maintains its published R-value over time and is backed by a 100% 20-year R-value warranty.
Key Benefits
- Thermal Efficiency: Prevents up to 25% of heat loss in structures by insulating below-grade and under slabs.
- Long-Term R-Value Stability: EPS remains stable over decades without thermal drift, unlike XPS.
- Moisture Resistance: EPS dries quickly and absorbs less long-term moisture compared to XPS.
- Protective Function: Shields waterproofing/dampproofing from damage during backfill activities.
- Structural Strength: Offers compressive durability suitable for heavy-duty commercial applications.
- Warranty-Backed: 20-year full R-value warranty supports long-term performance.
Best For
- Foundation wall insulation
- Under-slab insulation
- Plaza decks & block-outs
- Radiant-heated concrete floors
- Drainage board & cold storage applications
- Stadium seating insulation
Product Properties
| Property | Specification |
|---|---|
| Material | Closed-cell EPS (Expanded Polystyrene) |
| R-Value Stability | 100% R-value retention over 20 years (no thermal drift) |
| Moisture Behavior | Low long-term absorption and quick drying—EPS retains less moisture than XPS. |
| Compressive Strength | Multiple grades available; suitable for structural use under slabs |
| Panel Sizes | Custom-cut: up to 40″ thickness; standard configurations include tongue‑and‑groove, drainage board, laminated, flute‑fill, and R‑Tech fanfold |
| Warranty | 20-year 100% thermal performance coverage |
