Celotex has discontinued its 12mm PIR offering. The thinnest PIR alternative available is the 15mm Unilin Xtratherm PIR
The 12mm Celotex TB4012 is a polyisocyanurate (PIR) Insulation Board delivering exceptional thermal performance with straightforward installation. Featuring a low emissivity foil facing, this product suits numerous applications including Floor Insulation, walls, and roofs.
These lightweight 12mm PIR boards measuring 2400 x 1200mm provide reliable Insulation performance with low emissivity foil facing. The boards achieve a BRE Green Guide A rating, confirming environmental credentials. BBA certification covers certificates 16/5352 for Timber Frame Dwellings and 17/5405 for Pitched Roof, Dry Lining, and Floor Insulation applications.
Thickness: 12mm PIR
Length: 2400mm
Width: 1200mm
Dimensions: 2,400mm x 1,200mm x 12mm = 2.88m2
Weight: 1.44kg
Density: 42kg/m3
Material: Polyisocyanurate PIR Insulation
Profile: Improved thermal performance
Thermal Conductivity: 0.022 W/mk
R-Value: 0.60m2K/W
Series: Celotex TB4000
Compressive Strength: 120kPa
Vapour Resistivity: 100 MNs/gm
Building Regulations: Compliant - 16/5352 | 17/5405
Finish: Low Emissivity Composite Foil Facing
Applications: Walls|Roofs ǀ Floors ǀ Ceilings
BBA Certified: Yes (no. 17/5405, 16/5352)
Reaction to Fire: Euroclass F
Edge Profile: Square Edge
Features: High-performance PIR Rigid Insulation
Thermal Performance - This 12mm Insulation Board delivers superior thermal performance with a thermal conductivity rating of 0.022 W/m.K, enabling thinner insulation layers to meet required U-values.
High Performance Facer - The low emissivity foil facing enhances thermal performance within sealed cavity air spaces, delivering improved U-value results.
Easy to Install - These 12mm boards are lightweight and rigid, simplifying transport, handling, and installation on site.
BBA Certified - The Celotex TB4000 range holds BBA approval for specified roof, wall and floor applications when installed and maintained according to certification requirements.
Sustainability - Celotex Insulation TB4000 achieves a BRE Green Guide Rating of A
Roofs - Pitched Roof Insulation - Between and Under Rafters Roofs - Flat Roof Insulation - Balconies and Terraces Roofs - Flat Roof Insulation - Between and Under Joists Walls - External Wall Insulation - Upgrading Cavity Walls Walls - External Wall Insulation - Timber Frame Walls Walls - External Wall Insulation - Solid Walls Floors - Ground Floor - Beam and Block Floors Floors - Ground Floor Insulation - Concrete Slab Ground Floors Floors - Ground Floor Insulation - Upgrading Concrete Slab Floors Floors - Ground Floor Insulation - Suspended Timber Floors
This 12mm PIR Insulation Board provides excellent thermal performance in a thin profile, making it a preferred option for builders and contractors. Its high-performance characteristics enhance building energy efficiency, reduce operational heating and cooling expenses, and create improved indoor comfort levels.
Browse our Celotex range and refine by thickness or coverage using the filters. For product suitability advice or bulk quotations, contact us on +4402038839057, email sales@insulationbee, or use Live Chat - Lowest UK Insulation Prices.








