25mm Celotex TB4025 PIR Insulation Board

The 25mm Celotex TB4025 is a polyisocyanurate (PIR) Insulation Board delivering exceptional thermal efficiency with straightforward installation. Finished with a low emissivity foil facing, this product suits multiple applications including Floor Insulation, walls, and roofs.

These lightweight 25mm PIR boards measuring 2400 x 1200mm provide reliable Insulation performance with a low emissivity foil facing for enhanced thermal results. The product achieves a 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.

Properties

Thickness: 25mm PIR

Length: 2400mm

Width: 1200mm

Dimensions: 2,400mm x 1,200mm x 25mm = 2.88m2

Weight: 3.02kg

Density: 42kg/m3

Material: Polyisocyanurate PIR Insulation

Profile: Improved thermal performance

Thermal Conductivity: 0.022 W/mk

R-Value: 1.1 m2K/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

About

Thermal Performance - This 25mm Insulation Board provides outstanding thermal efficiency with a thermal conductivity rating of 0.022 W/m.K, enabling reduced insulation thickness to meet your target U-value requirements. High Performance Facer - The low emissivity foil facing enhances thermal performance within sealed cavity air spaces, delivering improved U-value results. Easy to Install - The 25mm Celotex boards combine lightweight construction with rigid structure, simplifying transport, handling, and installation on site. BBA Certified - Celotex TB4000 holds BBA approval for use in specified roof, wall and floor applications when installed, maintained and used according to certificate requirements. Sustainability - Celotex Insulation TB4000 achieves a BRE Green Guide Rating of A

Applications

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

Celotex PIR Insulation

This 25mm PIR Insulation Board is recognised for superior thermal performance, delivering strong insulation value in a compact thickness. Widely specified by contractors and builders for its performance and adaptability, it enhances building energy efficiency, reduces heating and cooling expenses, and creates a more comfortable living space.

Info

Explore our full Celotex range and refine by thickness or coverage using the filters on the left. For product suitability advice or bulk quotations, contact us on +4402038839057 , email sales@insulationbee or use Live Chat - Lowest UK Insulation Prices.