Dimensions | 1200 × 450 mm |
---|---|
Brand |
Celotex |
Thickness |
50mm |
Material Type |
Polyisocyanurate (PIR) |
Pieces Per Pack |
11 |
Sales Unit |
Board |
Unit Coverage |
5.94m2 |
Manufacturers Reference |
CW4050 |
Thermal Conductivity |
0.022W/mK |
Density |
31.5kg/m3 |
Fire Rating |
Euroclass F |
Edge Type |
Square |
Facing |
Low Emissivity Foil |
Weight (kg/m2) |
1.92kg/m2 |
Product Range |
Celotex Cavity Wall Board (CW4000) |
50mm Celotex cavity boards are rigid PIR insulation boards designed for enhanced thermal performance in cavity wall applications.
Celotex CW4050 50mm Cavity Wall Board (1200mm x 450mm) – 5.94m2 pack
Request your delivery date in checkout
on orders over £350 +VAT
£55.00 Original price was: £55.00.£45.50Current price is: £45.50. ex VAT
In Stock
50mm Celotex cavity boards are rigid PIR insulation boards designed for enhanced thermal performance in cavity wall applications.
EXCELLENT Based on 1069 reviews Andrew Yolland2025-07-03Trustindex verifies that the original source of the review is Google. Easy to purchase at reasonable prices. Great delivery Miles Hendley2025-07-03Trustindex verifies that the original source of the review is Google. Excellent service - Large order on pallets delivered to my door at the best price I could find - Thank you Denis Griffin2025-07-02Trustindex verifies that the original source of the review is Google. Great price and service. Was kept up to date with delivery, driver helped me get the material where it needed to be and even got a curtesy text from the firm the following day to make sure everything was ok. 100% would use and again and recommend. Ingus Lasinskis2025-07-01Trustindex verifies that the original source of the review is Google. good service, fast delivery and communication Cameron Smith2025-07-01Trustindex verifies that the original source of the review is Google. Great prices, easy and communicative with the delivery Lee Nicklen2025-06-27Trustindex verifies that the original source of the review is Google. Great price. Great delivery of PIR plasterboard. Top driver too, placed exactly where I wanted them. Packed well with multiple plastic wrap layers so no chance of the boards getting wet in bad weather. No damages. Didn't let me down. Thanks! Brett Dutson2025-06-27Trustindex verifies that the original source of the review is Google. Excellent service from a well priced company. I’ll be using this company again for insulation. ben seddon2025-06-27Trustindex verifies that the original source of the review is Google. I was surprised how quick from ordering to delivery took, plenty of delivery updates on the day and a phone call when they were close by. Delivery man was keen to help and position the boards where needed as well. Cant fault them. Vman Mills2025-06-26Trustindex verifies that the original source of the review is Google. Well a great transition from these guys was the cheapest online yet the quality is fantastic delivery time short and on time delivery guys efficient and polite thanks James and the gang my go to for insulation 👍 Ben Slater2025-06-26Trustindex verifies that the original source of the review is Google. As others have said, friendly and helpful, super smooth delivery, and the best price I could find online. Great customer service, and really communicative about the delivery, including having a real-time tracker. Would not hesitate to recommend.
Celotex 50mm Cavity Wall Insulation
Celotex 50mm Cavity Wall Insulation Board are 1200mm x 450mm in size. The 50mm Celotex Cavity Wall Boards are 50mm in thickness and are for use in cavity walls. The product code for the Celotex 50mm Cavity wall board is CW4050 and forms a part of the CW4000 range. Celotex cavity wall insulation boards are made from Polyisocyanurate, which is popularly known as PIR. This product features low emissivity foil facings on both sides to enhance thermal performance in sealed cavity air spaces. In addition to this, the CW4050 Board boasts a thermal conductivity of 0.022w/mK.
Celotex is a household name within the insulation industry. They are constantly improving their products and processes. Moreover, Celotex 50mm Cavity Wall Insulation Boards boast superior performance in partial fill cavity wall applications.
When it comes to sustainability, Celotex is on top of its game. Their Cavity Wall Boards are manufactured using a blend of blowing agents with zero ozone depletion potential (zero ODP) and low global warming potential (GWP). This means that the product itself is made in a way that reduces the impact on the planet. In addition to this, the installation of the Celotex Cavity Boards means that more heat can be retained in homes, which reduces the need for excessive energy usage to keep a house warm. In summary, Celotex Cavity Wall boards are great for the planet from manufacturing to the benefits of the installation.
Key Features of the Celotex CW4000 Range
- Celotex 50mm Cavity Wall Boards are lightweight
- They have great thermal performance
- They are both sustainable and energy efficient
- CW4000 boards are reliable and durable
- Celotex Cavity Wall Boards are water repellent
- The CW4000 Boards easy to install
- They are free from harmful gases (CFC and HCFC)
- They do not add to the formation of any gases with Ozone Depletion Potential (ODP) or Global Warming Potential (GWP)
Other advantages of 50mm Celotex Cavity Wall Insulation Boards are that they are able to conveniently fit in between cavity wall ties through cavity ties clips. In addition to this, the 50mm CW4050 offers long-lasting energy savings when installed. The aluminium foil faces allow for enhanced thermal performance. The board itself has exemplary dimenstional stability. Furthermore, CW4050 achieves a BBA (British Board of Agrement) and BRE (Building Research Establishment) Green Guide Rating of A. This means the installation of Celotex’s Cavity Wall Boards can help upgrade environmental performance.
50mm Celotex Cavity Wall Board Application
Celotex Cavity Wall Boards are designed for use in partial fill, masonry cavity wall applications. The product itself is specifically made to fit between cavity wall ties. 50mm Celotex Cavity Wall boards are 50mm in thickness. Cutting the board is not required as it fits standard wall tie spacing requirements. This cuts down installation times and therefore makes it a great solution to traditional methods.
50mm Celotex Cavity Wall Insulation Boards are tongue and grooved and are lightweight and easy to install.
The Celotex CW4000 range is long-lasting and extremely durable. When storing 50mm Celotex Cavity Wall Insulation, we recommend that you store the PIR board inside. Furthermore, this is to prevent the effects of weathering. If there is no other option but to store the cavity wall boards outside then keep them raised from the ground to avoid ground moisture. The 50mm Celotex Cavity Boards should be kept out of direct sunlight. If outside, this means they should be either under cover or protected with opaque polythene sheets. Furthermore, adverse weather effects could damage the board and affect performance so correct storage is appropriate. It is also worth noting that all of our CW4050 Cavity Wall boards are brand new. As a dedicated seller of insulation, we are able to offer our best price on 50mm Celotex Cavity Wall Insulation.
Celotex Cavity Wall Board Certifications
- Euroclass E Reaction to Fire classification, according to BS EN 13501-1
- A+ rating in comparison to the BRE Green Guide 2008
- CE marking complying with BS EN 13165:2001
- BS EN ISO 9001:2000 and quality management systems
- Environmental Management System – ISO 14001:2015
Dimensions | 1200 × 450 mm |
---|---|
Brand |
Celotex |
Thickness |
50mm |
Material Type |
Polyisocyanurate (PIR) |
Pieces Per Pack |
11 |
Sales Unit |
Board |
Unit Coverage |
5.94m2 |
Manufacturers Reference |
CW4050 |
Thermal Conductivity |
0.022W/mK |
Density |
31.5kg/m3 |
Fire Rating |
Euroclass F |
Edge Type |
Square |
Facing |
Low Emissivity Foil |
Weight (kg/m2) |
1.92kg/m2 |
Product Range |
Celotex Cavity Wall Board (CW4000) |
Dimensions | 1200 × 450 mm |
---|---|
Brand |
Celotex |
Thickness |
50mm |
Material Type |
Polyisocyanurate (PIR) |
Pieces Per Pack |
11 |
Sales Unit |
Board |
Unit Coverage |
5.94m2 |
Manufacturers Reference |
CW4050 |
Thermal Conductivity |
0.022W/mK |
Density |
31.5kg/m3 |
Fire Rating |
Euroclass F |
Edge Type |
Square |
Facing |
Low Emissivity Foil |
Weight (kg/m2) |
1.92kg/m2 |
Product Range |
Celotex Cavity Wall Board (CW4000) |
16 reviews for Celotex CW4050 50mm Cavity Wall Board (1200mm x 450mm) – 5.94m2 pack
Question: | What is CW4050? |
optiimize |
Answer: | The CW4050 is a 50mm Celotex Cavity Wall Board. | |
Question: | Can I install Celotex 50mm Cavity wall boards myself? |
optiimize |
Answer: | A building professional should be consulted when in stalling cavity wall insulation as it is installed as the wall is being built. | |
Question: | What size is a 50mm Celotex Cavity Wall Board? |
optiimize |
Answer: | The Celotex 50mm Cavity Wall Board - CW4050 - is 1200mm by 450mm. | |
Question: | How long will Celotex CW4000 50mm cavity wall boards last? |
optiimize |
Answer: | Celotex CW4000 50mm boards are designed to have a long service life, with no significant degradation over time, maintaining their thermal efficiency and structural integrity for many years. |
Rich –
outstanding service, really pleased!
David –
Choosing a delivery date at checkout is a great feature , it meant i could plan it to arrive the day that i needed it
Ahmed –
Fantastic cavity boards at a great price. The delivery driver made everything smooth and easy.
Robert –
Everyone was extremely knowledgeable and happy to help.
Nathan –
orderd for my partner, the boards are perfect! Thx
George –
Got my delivery within 6 days, brilliant
Alan –
Used this insulation in my basement, really impressed.
Brody –
Outstanding insulation, worth every penny
Anthony –
really good, the pack actually covers around 6.2m2 very happy
james martin –
Used for a new build out house as limited on space, worked well!
Francis Leeds –
Great price for a sheet of 50mm!
Rocket Builders (Jason) –
Very happy with my 50mm celotex cavity boards – we usually use the bigger sheets but we couldn’t use them this time round.
Smithy –
Not a bad price my builders merchant said could match the price but had to wait 6 weeks.
Billie Willows –
Fab service
Omar W –
Celotex is always my go to.
Gregory –
Got delivered in 2 days. Really impressed.