DB Plasterboard Tapered Edge 2400x1200 - 12.5mm 
100mm Thermal PIR Insulation 2400x1200x100mm
£35.97 Ex VAT
£43.16 Inc VAT
Product Code: PIRPRUF100MM
Barcode: 5060119200192
Unilin Thin-R, formerly known as Xtratherm, is a high-performance, foil-faced Polyisocyanurate (PIR) insulation board.
The 100mm PIR Insulation Board (2400x1200mm) is a high-performance rigid thermal insulation sheet suitable for a wide range of construction applications including walls, floors, pitched roofs, and flat roofs. Manufactured with a rigid polyisocyanurate (PIR) foam core and foil facings, it delivers outstanding thermal resistance and compressive strength while remaining lightweight and easy to install.
Designed to meet UK building regulations, this board reduces heat loss, improves energy efficiency, and is suitable for both new builds and refurbishments. It’s an excellent choice for builders, contractors, and DIYers working on domestic or commercial projects.
Applications of 100mm PIR Insulation
- Ideal for floor insulation, warm roof decks, and cavity walls
- Suitable for domestic, commercial, and industrial builds
- Provides excellent thermal performance and energy efficiency
- Lightweight board for fast and easy installation
- Commonly used by contractors across Greater London
Delivery in and Around London
We deliver 100mm PIR insulation boards to:
- All London boroughs: Camden, Hackney, Croydon, Lewisham
- Greater London areas: Enfield, Redbridge, Bexley, Barnet
- Surrounding counties: Kent, Essex, Hertfordshire, Surrey
Available in single sheets or trade packs with fast turnaround.
5 reviews for 100mm Thermal PIR Insulation 2400x1200x100mm
100mm Thermal PIR Insulation 2400x1200x100mm
What are my delivery options?
Free In-Store Pickup
Free In-store pickup is available for All purchases. Pickups are available Monday-Friday 09:00-16:00
Free Delivery (2-3 Business Days)
We offer Free delivery on all orders (Minimum order value: £250.00) within Greater London (See Postcodes) (excl. Bricks & Blocks)
Please click here to view our Delivery Details
Bricks & Blocks Delivery (2-5 Business Days)
Bricks & Blocks Delivery will cost £85 per pack (Qty: 1-4) or £350 per order (Qty: 5+) within Greater London (See Postcodes)
Returns Address
Builders Megastore: 753-755 London Rd, Croydon CR7 6AW
Returns Information
Accept returns for both defective and non-defective products
Exchanges: Accept exchanges Product Condition: New only Returns Window: 30 days
Method & Fees
Method: In store, By mail
Return label: Customer responsibility Restocking fees: No cost Refund processing time: 5 days
Please click here to view our Returns Policy
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Just purchased some 100mm Thermal PIR Insulation, thank you Builders Megastore for delivering them so quickly to our site.
Great product, thank you for the quick delivery
Just purchased 25 sheets and a load of other products, was so cheap, thanks
Was about to place an order online but then decided to ring instead, the gentleman i spoke with (Mike) was very patient and helpful to me. Glad i called them as they really put my mind at ease. All products turned up on-time and undamaged ready for my builders to proceed with their work. Thank you so much
Ordered for the roof of my shed, did a great job and keeps the shed nice a warm, thanks to Builders Megastore for the quick turnaround