100mm Celotex CW4000 Cavity PIR Cavity Insulation Board delivers outstanding thermal efficiency with its polyisocyanurate (PIR) construction and low emissivity foil facing. This insulation board is engineered for partial fill cavity wall installations, with thicknesses available from 40mm to 100mm.

Celotex has discontinued the following thicknesses: 25mm, 55mm, 65mm, 70mm, 80mm and 90mm. Click to request a quotation and we will recommended an equivalent product.

Product specification

• Brand: Celotex®
• Model: 100mm CW4100
• Thickness: 100mm
• Length: 1200mm
• Width: 450mm
• Pack quantity: 6
• Board Coverage: 0.54m2
• Pack Coverage: 3.24m2
• Dimensions: 1,200mm x 450mm x 100mm
• R-Value: 4.5 m2K/W
• Thermal Conductivity: 0.022 W/mk
• Density: 30Kg/m3
• Material: PIR Insulation (polyisocyanurate)
• Profile: Improved thermal performance
• Vapour Resistivity: 100 MNs/gm
• Building Regulations: Compliant
• Finish: Foil facings
• Shipping method: Articulated Vehicle
• Applications: Cavity Walls ǀ Masonry Walls | 100mm Partial fill insulation
• BBA Certified: Yes (no. 16/5343)
• Features: High-performance Cavity Wall Board
• Manufacturer: Celotex CW4000®

Product Features

• Lightweight 1200 x 450mm boards
• Squared edges
• Low emissivity foil facing
• BBA approved – certificate 16/5343 (Masonry Partial Fill Cavity Walls)

Fire Classification

Euroclass F Reaction to Fire classification, according to BS EN 13501-1. Products with this level of classification are not provided with a rating for smoke emission.

Product Benefits

Thermal Performance

This 100mm Celotex CW4000 board provides exceptional thermal efficiency, featuring a thermal conductivity rating of 0.022 W/m.K that minimises the thickness required to meet your target U-values.

High Performance Facer

The reflective low emissivity foil facing boosts thermal performance within sealed cavity air spaces, delivering improved U-value results.

Easy to Install

These 100mm celotex cavity insulation boards combine lightweight construction with rigid strength, simplifying transport, handling, and installation. They're engineered to align with standard wall tie spacing for straightforward fitting.

BBA Certified

100mm Celotex CW4000 partial fill carries BBA certification, validating its performance for specified partial fill cavity wall applications when installed and maintained according to certificate requirements. Consult the BBA certification documentation for full details and any restrictions.

Key Considerations

When installing 100mm Celotex pir partial fill insulation, verify compliance with all relevant Building Regulations, national guidance, and applicable standards for your specific project. This encompasses fire safety requirements and any height-related restrictions.

More Information on 100mm Celotex CW4000 Cavity PIR

• Manufaturer Link: 100mm Celotex CW4000 Cavity PIR
• Browse our full range of Celotex Insulation products and refine by thickness or coverage using the filters. For product suitability advice, volume discounts, or technical guidance, contact us on +4402038839057 , email sales@insulationbee or use Live Chat - Competitive UK Celotex Insulation Pricing.