Question 1

1. What is PIR insulated plasterboard?

Accepted Answer

PIR insulated plasterboard is a thermal laminate wallboard that combines PIR insulation with plasterboard. It allows insulation and internal finishing to be installed in one step, saving time and space.

Question 2

2. Can PIR insulated plasterboard be attached with dot and dab?

Accepted Answer

Yes, many systems are suitable for dot and dab installation onto masonry. Mechanical fixing or batten systems may also be used where needed for structural or moisture considerations.

Question 3

3. Does PIR insulated plasterboard include a vapour control layer?

Accepted Answer

Most PIR insulated plasterboards include a foil backing that acts as a vapour control layer. This helps limit moisture movement and reduce condensation risk when correctly detailed. Examples include Celotex PL4000 PIR insulated plasterboard, which features composite foil facings and is described as having an inbuilt vapour control layer .

Question 4

4. Can PIR insulated plasterboard be used on ceilings?

Accepted Answer

Yes, it’s commonly used on ceilings and roof slopes as well as walls.

Question 5

5. Is PIR insulated plasterboard suitable for solid walls?

Accepted Answer

Insulated PIR plasterboard can be used on solid masonry walls as part of internal wall insulation. This approach is often used where external insulation is not practical, such as in retrofit projects or where external finishes must be retained.

However, its suitability depends on the wall construction and moisture behaviour. PIR-based systems are vapour-resistant, so correct detailing is needed when used on traditional solid walls.

Question 6

6. How does PIR insulated plasterboard help control condensation?

Accepted Answer

Foil-faced PIR boards and bonded vapour layers reduce the movement of warm air moisture into colder parts of the wall. This lowers the risk of interstitial condensation.

Question 7

7. Do I need additional insulation with PIR insulated plasterboard?

Accepted Answer

In many cases, no additional insulation is needed. The combined board provides both insulation and lining, although thicker boards may be specified to meet target U-values.

PIR insulated plasterboard

62.5mm Celotex PL4050 Insulated Plasterboard Tapered Edge 2400mm x 1200mm

77.5mm Celotex PL4065 Insulated Plasterboard Tapered Edge - 2400mm x 1200mm

62.5mm Siniat Thermal PIR Insulated Plasterboard Tapered Edge - 2400mm x 1200mm

72.5mm Siniat Thermal PIR Insulated Plasterboard Tapered Edge - 2400mm x 1200mm

37.5mm Siniat Thermal PIR Insulated Plasterboard Tapered Edge - 2400mm x 1200mm

63mm Gyproc Thermaline PIR Insulated Plasterboard - 2400m x 1200mm

78mm Gyproc Thermaline PIR Insulated Plasterboard - 2400m x 1200mm

53mm Gyproc Thermaline PIR Insulated Plasterboard - 2400m x 1200mm

37.5mm Warmline PIR Insulated Plasterboard 2400mm x 1200mm

52.5mm Warmline PIR Insulated Plasterboard 2400mm x 1200mm

62.5mm Warmline PIR Insulated Plasterboard 2400mm x 1200mm

93mm Gyproc Thermaline PIR Insulated Plasterboard - 2400m x 1200mm (Pack of 9 sheets)