Celotex CW4075 75mm x 1200mm x 450mm - 4.32m2 Cavity wall Insulation
Celotex CW4075 75mm x 1200mm x 450mm - 4.32m2 Cavity wall Insulation
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Celotex CW4075 75mm x 1200mm x 450mm - 4.32m2

SKU: cw40755

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Elevate your home's energy efficiency with Celotex CW4075 75mm insulation boards, designed for exceptional thermal performance in partial fill cavity wall applications. Crafted with a polyisocyanurate rigid foam core, these boards boast a low thermal conductivity of 0.022 W/mK, thanks to the aluminum foil facings on both sides, which enhance insulation and reduce air spaces within cavity walls. The convenience of fitting between cavity wall ties using clips ensures a secure and lasting energy-saving solution for all types of buildings. These boards have exemplary dimensional stability, and with certifications including an A+ rating in the BRE Green Guide 2008, CE marking to BS EN 13165:2001, and compliance with CFC/HCFC-free standards, you can trust in their eco-friendliness. Each board measures 1200mm x 450mm, has a compressive strength of 120kPa, and provides over 4.32 square meters of coverage, making it the ideal choice for your insulation needs. Trust in Celotex CW4075 for a more efficient and sustainable home.

Key Features

  • Size of Board: 1200 x 450 mm
  • Thickness: 75 mm
  • Thermal conductivity: 0.022W/mK
  • Area/pack: 4.32m2
  • Board weight: 2.48kg
  • Compressive strength: 120kPa
  • Water vapour resistance: Greater than 150MNs/g
  • Dimensional stability: DS (TH) 8


  1. Conveniently fits in between cavity wall ties through cavity ties clips
  2. Clips offer Retention
  3. Gives long lasting reliable energy savings for all buildings
  4. Foil facers with low emissivity provide improved thermal insulation along with cavity walls air spaces
  5. Exemplary dimensional stability


  • The insulation component of this Celotex is given an A+ rating in comparison to the BRE Green Guide 2008
  • This got CE marking complying with BS EN 13165:2001
  • This is CFC/HCFC free that means zero ozone depletion potential (ODP) along with low global warming potential (GWP)
  • This is formed in accordance with BS EN ISO 9001:2000 and quality management systems by Celotex Limited

Other Related Products

Celotex XR4150 150mm Insulation Board: Looking for thicker insulation? The Celotex XR4150 offers excellent thermal performance.

Celotex TB4000 Thermal Bridging Board: Prevent thermal bridging effectively with these specialized boards.

Celotex XR4120 120mm Insulation Board: Ideal for projects requiring 120mm thickness insulation.

Celotex GA3090 90mm Insulation Board: Balance insulation and space with the Celotex GA3090.

Celotex GA3070 70mm Insulation Board: A great option for when space is limited.

Celotex GA4000 General Purpose PIR Insulation Board: Versatile and suitable for various applications.

Celotex XR4000 Insulation Board: Find the right size and thickness to meet your insulation needs with the Celotex XR4000 range.

Frequently Asked Questions

What are Celotex CW4075 insulation boards used for? These boards are designed for thermal insulation in partial fill cavity wall applications. 

What is the thermal conductivity of Celotex CW4075 insulation boards? The boards have a thermal conductivity of 0.022 W/mK.

How many boards come in a pack of Celotex CW4075? Each pack contains enough boards to cover an area of 4.32 square meters.

Are the Celotex CW4075 boards easy to install? Yes, these boards are designed for easy installation between cavity wall ties using clips for retention.

What is the weight of each Celotex CW4075 insulation board? Each board weighs approximately 2.48kg.

Do Celotex CW4075 boards provide long-lasting energy savings? Yes, these boards offer reliable, long-lasting energy savings for all types of buildings.

Are the Celotex CW4075 boards environmentally friendly? Yes, these boards are CFC/HCFC-free, with low global warming potential (GWP) and zero ozone depletion potential (ODP).


    Length 1200mm
    Width 450mm
    Coverage 4.32m2
    Thermal Conductivity 0.022 W/mK
    Thickness 75mm
    Weight_kg 2.48
    Brand Celotex
    Material Type Polyiso

    Est Delivery between and .

    Delivery will always take place on a weekday (Mon - Fri).
    For more information on delivery visit our delivery info page.

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