# Celotex CW4000 PIR Wall Cavity Partial Fill 450mm x 1200mm - All Sizes

#### Celotex CW4000 PIR Wall Cavity Partial Fill [Data Sheet](https://cdn.shopify.com/s/files/1/0705/2869/6596/files/Celotex_CW4000_Partial_Fill_PIR.pdf?v=1675701648)

#### **Certifications**

Celotex CW4000 PIR Wall is certified with an A+ rating compared to the BRE Green Guide 2008 and CE marking complying with BS EN 13165:2001. The Celotex Cavity Wall is developed under BS EN ISO 9001:2000 and quality management systems by Celotex Limited.

It has an excellent thermal performance that decreases the thickness of CW4000 PIR Wall Cavity required to hit the required U-value, optimising space in the construction design and helping to reduce the heating and cooling costs within the building.

Celotex CW4000 PIR Wall Cavity is an insulation board aimed at partial fill cavity wall applications. It comprises a polyisocyanurate rigid foam insulation core, with a thermal conductivity of 0.022 W/mK and low emissivity aluminium foil facings on both sides.

CW4000 is manufactured from rigid PIR using a blend of blowing agents that have zero ozone depletion potential and low global warming potential.

**\*Sold in Pack Qty Only**

#### Pack Sizes

**Thickness**

**No. of Boards**

**Pack Coverage (Sq/m)**

40mm

14

7.56

50mm

11

5.94

60mm

10

5.4

75mm

8

4.32

85mm

7

3.78

100mm

6

3.24

## Details

- **Price:** 64.12 GBP - 72.96 GBP
- **Vendor:** Celotex
- **Type:** Cavity Wall PIR Insulation
- **Tags:** Cavity, Cavity Board, Cavity Wall, Celotex, Celotex Insulation Board, CW4000, PIR

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| 50mm | 70.00 GBP | In stock |
| 60mm | 72.96 GBP | In stock |
| 75mm | 64.12 GBP | In stock |
| 100mm | 67.86 GBP | In stock |

## Images

- Celotex CW4000 PIR Wall Cavity Insulation Board
- Celotex CW4000 PIR Wall Cavity Insulation Board
- Celotex CW4000 PIR Wall Cavity Insulation Board
- Celotex CW4000 PIR Wall Cavity Insulation Board

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> Source: [Next Day Insulation](https://nextdayinsulations.com/products/celotex-cw4000-pir-wall-cavity-fill-450mm-x-1200mm)
> Updated: 2026-08-20