Skip to the beginning of the images gallery

Celotex CW4050 Cavity Wall Insulation 1200x450x50mm - 11 Per Pack (5.94m2)

SKU

celoc50-S

£0.00 £0.00

Celotex CW4050 Cavity Wall Insulation 1200x450x50mm - 11 Per Pack (5.94m2) is available to buy in increments of 1

Product Information

Celotex CW4050 cavity wall insulation boards, each 1200mm (47.24") x 450mm (17.72") x 50mm (1.97") for easy fitting between wall ties.
High-performance PIR insulation offering a low thermal conductivity of 0.022 W/mK for effective heat retention.
Suitable for partial fill masonry cavity walls in new construction and extensions, trusted by builders and developers.
Lightweight and rigid boards simplify handling and installation on site, saving time and labour.
Boards sold in packs of 11, covering 5.94m²; ensure to check pack sizes before ordering.

Details

Celotex CW4050 is a premium rigid polyisocyanurate (PIR) insulation board designed specifically for partial fill cavity wall applications. This product is aimed at builders, contractors, and site managers who require reliable, high-performance insulation that supports compliance with building regulations and delivers long-term energy efficiency.

Important: Boards are supplied in packs of 11, covering 5.94m² per pack.

Application

These insulation boards are ideal for use in new builds and extension projects where partial fill cavity wall insulation is specified. The boards fit neatly between masonry cavity wall ties, providing excellent thermal resistance while helping to reduce heat loss and improve overall building energy performance. Their low emissivity aluminium foil facing enhances thermal efficiency by increasing the resistance of the air cavity it faces. This makes CW4050 a practical and dependable choice for contractors focused on delivering quality, energy-compliant builds.

Dimension

1200mm (47.24") x 450mm (17.72") x 50mm (1.97")

Material

Polyisocyanurate (PIR) rigid foam core
Low emissivity composite aluminium foil facing

Type

Cavity wall insulation board

The Celotex CW4050 boards are CE-marked and certified by the British Board of Agrément, ensuring they meet stringent standards for thermal performance, durability, moisture resistance, and condensation risk. Manufactured with an environmentally responsible blowing agent, these boards support both sustainability goals and building regulation requirements. For technical guidance or specific installation advice, please contact our technical services team or refer to the manufacturer’s online resources.

More Information

More Information
Manufacturer	Celotex
MPN	CW4050
Insulation - Type	Cavity Wall
Insulation - Range	Celotex CW4000
Insulation - Thickness	50mm
Availability	Generally available in 3 working days.
Sap Id	celoc50-S
Unit of measure	per pack

Customer Reviews

No reviews yet on this product

Delivery Information

Delivery availability

We deliver to most mainland UK addresses. Some postcode areas are excluded – please see the full list below.

Delivery charges

Delivery costs vary depending on your location, the products ordered, and the delivery method selected. All delivery charges are calculated clearly at checkout.

Fuel Surcharge

Information on our added Fuel Surcharge can be found at https://condell-ltd.com/fuel-surcharge-notification

Delivery dates

You can request a preferred delivery date at checkout. While we aim to meet this wherever possible, availability may depend on stock levels and third-party delivery schedules. If your chosen date is unavailable, a member of our team will contact you to arrange an alternative.

Delivery method

All deliveries are made kerbside as standard. For health and safety reasons, drivers are unable to carry materials beyond the kerb. If you have specific access requirements, please contact us before placing your order.

Delivery exclusions

We currently do not deliver to the following postcode areas:

AB16, AB21–22, AB30–AB38, AB41–AB56, BT1–BT94, CA2, CA15, CA28, DD1, DD8, DD9, DG1, DG2, DG10–DG14, DG16, FK18–FK20, GY1–GY9, HS1–HS9, IM1–IM9, IV1–IV5, IV7, IV12–IV13, IV21–IV28, IV30–IV36, IV40–IV56, JE1–JE4, KA1, KA4–KA6, KA14–KA15, KA18–KA21, KA27–KA30, KW1–KW3, KW6–KW17, KY6–KY10, KY13–KY16, LL49, LL58–LL62, LL64–LL78, PA17–PA78, PH11, PH19–PH26, PH30–PH33, PH35–PH38, PH40–PH44, PH49–PH50, PO30–PO41, SA68, SA71, ZE1–ZE3

Important delivery terms

Shortages must be reported within 48 hours and noted on delivery paperwork
All deliveries must be signed for; redelivery charges may apply
Deferred deliveries may incur storage charges
Collected orders are not subject to delivery charges
Returns are subject to a 25% restocking fee (delivery charges excluded)
Made-to-measure items are non-refundable
Reasonable access to the delivery point must be available; additional charges may apply