The 65mm Celotex GA4000 is a high-performance polyisocyanurate (PIR) Insulation Board delivering exceptional thermal efficiency with straightforward installation. Featuring a low emissivity foil facing, this product suits multiple applications including Floor Insulation, walls, and roofs.
These lightweight 65mm PIR boards measuring 2400 x 1200mm provide reliable Insulation performance with a low emissivity foil facing for enhanced thermal efficiency. The product achieves an impressive BRE Green Guide A rating, confirming its sustainability credentials. BBA certification is held under certificates 16/5352 for Timber Frame Dwellings and 17/5405 for Pitched Roof, Dry Lining, and Floor Insulation applications.
Thickness: 65mm PIR
Length: 2400mm
Width: 1200mm
Dimensions: 2,400mm x 1,200mm x 65mm = 2.88m2
Weight: 5.82kg
Density: 42kg/m3
Material: Polyisocyanurate PIR Insulation
Profile: Improved thermal performance
Thermal Conductivity: 0.022 W/mk
R-Value: 3.01 m2K/W
Series: Celotex GA4000
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 65mm Insulation Board delivers superior thermal performance with a thermal conductivity rating of 0.022 W/m.K, enabling reduced insulation thickness whilst maintaining required U-value targets.
High Performance Facer - The low emissivity foil facing enhances thermal performance in sealed cavity spaces, delivering improved achievable U-values.
Easy to Install - These 65mm Celotex boards are lightweight and rigid, simplifying transport, handling, and installation on site.
BBA Certified - Celotex GA4000 holds BBA approval for defined roof, wall and floor applications when installed, used and maintained according to certification requirements.
Sustainability - Celotex Insulation GA4000 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 65mm PIR Insulation Board offers excellent thermal performance with a thin profile, making it ideal for contractors and builders. The product enhances building energy efficiency, reduces heating and cooling expenses, and creates a more comfortable living space.
Browse our Celotex range and filter by thickness or coverage on the left side of the page. For product suitability advice or bulk quotations, contact us on +4402038839057, email sales@insulationbee, or use Live Chat for the lowest UK Insulation prices.













