Best Plasterboard & Plastering Supplies — PIR Insulated Plasterboard (2026)
1 plasterboard & plastering supplies matching material “PIR Insulated Plasterboard”, hand-picked from UK Amazon listings.
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PIR insulated plasterboard offers a robust solution for improving thermal performance within buildings. These boards combine the strength of standard gypsum plasterboard with the added benefits of polyurethane insulation, significantly reducing heat loss and contributing to energy efficiency. Ideal for use in extensions, loft conversions, and internal wall applications where enhanced thermal protection is required, PIR plasterboard provides a stable core for plastering and decorating.
This type of plasterboard is particularly suitable for areas prone to condensation or those requiring a lower surface temperature, such as bathrooms and kitchens. The insulation layer helps maintain consistent temperatures within these rooms, reducing the strain on heating systems and improving comfort levels. When installed correctly, PIR insulated plasterboard can contribute significantly to achieving building regulations compliance.
The boards typically feature a moisture-resistant facing which aids in preventing damp issues. Ensure you select the correct thickness for your application - thinner boards are easier to work with but offer less insulation, while thicker options provide superior thermal performance and structural integrity. Always check product specifications before purchasing.
#1 Pick
37.5mm Insulated Plasterboard, 1200 x 1200mm x 20 Boards - 28.8m2 (25mm PIR Insulation & 12.5mm Plasterboard)- PIR Insulated Plasterboard
- 1200 x 1200 x 37.5mm
£577.99
Pros
- 25mm PIR insulation core bonded to 12.5mm plasterboard cuts out a separate insulation-fixing job
- Full pallet of 20 boards covers 28.8m2, enough for a typical extension or garage conversion
- Improves U-values on internal wall linings without losing much room space
Cons
- High order value and pallet delivery means it suits planned bulk jobs rather than small patches
FAQ
What is PIR insulation?+
PIR (Polyurethane) insulation is a closed-cell foam insulation material that provides excellent thermal resistance when incorporated into plasterboard. It’s known for its high R-value and ability to retain its shape, even when exposed to moisture.
How thick should I buy PIR insulated plasterboard?+
The ideal thickness depends on your project; 19mm is common for internal walls, while 24mm or 28mm offers greater thermal performance and structural strength. Consider the space available and the desired level of insulation when making your choice.
Can I use PIR insulated plasterboard in a damp environment?+
Yes, but it’s crucial to select boards with a moisture-resistant facing designed for use in bathrooms or kitchens. Proper ventilation is also key to preventing condensation and maintaining the board's insulation properties.
What tools do I need to work with PIR insulated plasterboard?+
You will require standard plastering tools such as a hawk, trowel, float, and taping knife. A sharp utility knife or scoring tool is also essential for accurate cutting.
Does PIR insulation shrink when it gets wet?+
Closed-cell PIR foam does not readily absorb water, so shrinkage due to moisture is minimal. However, prolonged exposure to damp conditions can still compromise its insulating properties.
How do I prepare the surface for PIR insulated plasterboard?+
Ensure the substrate is clean, dry, and structurally sound before applying the board. You may need to apply a bonding adhesive to ensure good adhesion and prevent movement.
What type of adhesive should I use?+
A suitable bonding adhesive designed for gypsum-based products is recommended. Check that the adhesive is compatible with PIR insulation to avoid any potential chemical reactions or reduced adhesion.
Can I cut PIR insulated plasterboard with a jigsaw?+
Yes, you can cut PIR insulated plasterboard with a jigsaw using a fine-tooth blade designed for cutting foam materials. Take care when operating the jigsaw to prevent damaging the board’s surface.
What is the R-value of PIR insulated plasterboard?+
The R-value (thermal resistance) of PIR insulated plasterboard varies depending on its thickness and density, typically ranging from 4.2 to 6.0 m²·K/W.
Where can I find more information about installation best practices?+
Refer to manufacturer’s guidelines for specific installation recommendations and consider consulting with a qualified plastering professional for complex projects or if you have any doubts about the correct procedure.