Urethane insulation board is rigid foam made into flat sheets. It can improve insulation without making a wall or ceiling much thicker, but the gaps between boards and the finish that protects the foam need to be planned at the same time.
For insulation where wall or ceiling thickness is tightly limited
It suits narrow walls and low ceilings where the required insulation and protective finish must fit without taking too much usable room.
- Walls where a thicker insulation layer would noticeably reduce room or corridor width
- Small ceiling areas where insulation must be added without losing too much height
- Projects that can name the exact board, materials attached to each side, and protective finish in the quote
The foam should not remain exposed inside a room. Areas near heat, electrical equipment, or fire-resistant walls and ceilings need suitable protection.
- No protective lining or final surface has been selected
- A cut edge or board face could remain exposed after the work is complete
- Fire safety, environmental, or sound results are being assumed from the product name alone
A question from INBOT
Compare the thickness, attached materials, and protective finish
Two urethane boards can use different foam, materials on the front and back, and thicknesses, so their heat-loss figures and installation methods may differ.
- What thickness is needed for the insulation target?
- Compare the thickness and heat-loss figure for each exact product. Do not borrow a number from a different foam or a board with different materials attached to it.
- What is attached to the front and back of the board?
- Check whether the board has paper, metal, or another layer on either side. Do not assume that this facing replaces moisture control or the protective board required inside the room.
- Which layer protects the foam from pressure and impact?
- On a floor or a wall within reach, check what spreads the weight of people and furniture or takes everyday knocks. The foam should not directly carry the final finish or remain exposed to impact.
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Compare real products
These examples come from official manufacturer pages. Formats, facings and intended locations vary, so use them as a starting point rather than a ranking.
1–6 of 6
| Market | Product | What it is | Official page |
|---|---|---|---|
| Korea | 에스와이테크보드 | A rigid PIR insulation range with either bare foam surfaces or protective layers attached to both sides, in formats and thicknesses for walls, roofs and floors. | Open |
| Korea | 벽산벽산 테크보드 | A rigid polyurethane foam board range for roofs, walls and floors, with or without outer layers and in different densities and thicknesses. | Open |
| Japan | アキレスキューワンボード | A high-performance rigid urethane insulation board for homes, faced with aluminum foil on both sides and offered for walls, floors and roofs. | Open |
| Japan | FPコーポレーションASQボード | A foil-faced rigid urethane board for adding a continuous insulation layer outside timber-frame homes, beneath the exterior finish. | Open |
| United States | AtlasEnergyShield® | A foil-faced polyiso board used as continuous insulation over wood, steel, masonry or concrete exterior walls. | Open |
| United States | Johns ManvilleAP™ Foil-Faced Foam Continuous Insulation | A polyiso board with reflective foil on one side and white foil on the other, used on interior and exterior walls, ceilings, attics and crawlspaces. | Open |
A rigid PIR insulation range with either bare foam surfaces or protective layers attached to both sides, in formats and thicknesses for walls, roofs and floors.
A rigid polyurethane foam board range for roofs, walls and floors, with or without outer layers and in different densities and thicknesses.
A high-performance rigid urethane insulation board for homes, faced with aluminum foil on both sides and offered for walls, floors and roofs.
A foil-faced rigid urethane board for adding a continuous insulation layer outside timber-frame homes, beneath the exterior finish.
A foil-faced polyiso board used as continuous insulation over wood, steel, masonry or concrete exterior walls.
A polyiso board with reflective foil on one side and white foil on the other, used on interior and exterior walls, ceilings, attics and crawlspaces.
Official pages checked 2026-08-24 · Recheck pricing and availability at the linked page.
A question from INBOT
Include board joints and the protective finish in the quote
The work is not complete until the insulation continues through joints and corners and the foam is fully covered inside the room.
- Record the exact product, board type, attached materials, thickness, and heat-loss information in the quote.
- Show how the boards will be arranged and how joints, corners, and cut edges will be filled and covered.
- Include the protective board, final finish, and the method used to hold everything to the wall or ceiling.
- For areas near wiring, electrical equipment, hot pipes, or fire-resistant walls and ceilings, confirm the extra protection required by the product information and local rules.
You can also review wall insulation or compare XPS and glass wool for different locations.
A question from INBOT
Do not leave a lifted finish or exposed foam untreated
The insulation is hidden after finishing, so changes on the wall and any exposed cut edge during repairs become useful clues.
- Keep the product name, thickness, board arrangement, joint photos, and protective finish details for later repairs.
- If the finish lifts, sounds hollow, or shows repeated condensation, check the board joints and moisture source instead of simply covering it again.
- When a repair exposes the foam, inspect broken corners, open cut edges, and wet areas, then restore the protective board and final finish.
A question from INBOT