Thermaboard
A rigid modified-EPS board cut to standard framing depths and designed for a friction fit. Self-extinguishing, with an R-value that does not degrade over time. Three thicknesses, two board sizes, and no minimum order.
Freight is quoted separately.
All boards ship by freight carrier on pallets. The price above covers the boards only. After you order we’ll send a freight quote within 24 to 48 hours, and your order is held until you approve it.
Checkout is handled by Shopify. We ship to the job site — freight is quoted separately based on the load and the distance.
loadingWhat you get for the money.
Six things, all of them verifiable. Nothing here depends on you taking our word for it.
- 01Self-extinguishingIt will not carry a flame through an assembly and it will not add fuel to a fire.
- 02Stable R-valueR-3.80 per inch, every inch. It does not degrade over decades.
- 03No mold, no mildew, no off-gassingInorganic, so there is nothing in it for mold to feed on.
- 04Cut to standard framing depths3½″ is a 2×4. 5½″ is a 2×6. Designed for a friction fit, no fasteners.
- 05Noise reduction between spacesMeaningful reduction in sound transmission through the wall.
- 06No minimum orderBuy one board or a truckload. No pallet quantities.
Six boards. That is the whole catalog.
Three thicknesses, two board sizes, one material. Nothing to configure past this table.
| THICKNESS | BOARD SIZE | COVERAGE | R-VALUE | WEIGHT | PRICE | Select this board |
|---|---|---|---|---|---|---|
| 3.5"2×4 BAY | 4 × 8 FT | — | — | — | — | |
| 3.5"2×4 BAY | 4 × 12 FT | — | — | — | — | |
| 5.5"2×6 BAY | 4 × 8 FT | — | — | — | — | |
| 5.5"2×6 BAY | 4 × 12 FT | — | — | — | — | |
| 7.5"ROOF / SLAB | 4 × 8 FT | — | — | — | — | |
| 7.5"ROOF / SLAB | 4 × 12 FT | — | — | — | — |
Installation
- Measure the bay, not the boardCut approximately ⅛ inch wider than the clear opening for a secure friction fit. For standard 16-inch on-center framing, verify the opening before cutting.
- Cuts with common toolsUse a handsaw, hot wire, or utility knife for thinner boards. No specialized equipment required.
- No fasteners, no adhesiveThe board is designed for a friction fit in a standard bay. Tape the seams when a tighter envelope is required.
- Lightweight and easy to handleA 3.5-inch 4′ × 8′ board weighs approximately 9 pounds, making one-person installation easier.
Shipping
- Order by 12:00 PM ESTSame-day processing. Ready to ship inside 48 hours.
- Freight to the job siteAll boards ship by freight carrier on pallets, quoted separately after you order. We’ll email a quote within 24 to 48 hours and hold the order until you approve it.
- Ships from VirginiaNationwide freight. Lead time depends on the lane.
- No minimum, no palletsOrder eleven boards if eleven is what the job needs.
Order by noon. Ready inside 48 hours.
No minimum, no pallet quantities, no account to open. The price covers the boards, shipped by freight carrier on pallets — after you order we’ll send a freight quote within 24 to 48 hours, and your order is held until you approve it.