Cavity wall Insulation

Cavity Wall Insulation stores the heat within the inner walls. Full range of Cavity Wall Insulation Boards supplied by Build4less. We stock the best brands from Kingspan & Celotex to Ballytherm and many more. Contact us on Live Chat or by phone 020 3481 1978 if you require any help - Nationwide Delivery

Knauf Dritherm 37 (All Sizes) 1200mm x 455mm
Vendor
Knauf Earthwool
Regular price
from £12.74 £15.29
Sale price
from £12.74 £15.29
Regular price
£0.00
Unit price
per 
Sold out
Rockwool RW3 (All Sizes)
Vendor
Rockwool
Regular price
from £291.38 £349.66
Sale price
from £291.38 £349.66
Regular price
£0.00
Unit price
per 
Sold out
Kingspan Kooltherm K108 Cavity Board (All Sizes) 1200mm x 450mm
Vendor
Kingspan
Regular price
from £81.22 £97.46
Sale price
from £81.22 £97.46
Regular price
£0.00
Unit price
per 
Sold out
Rockwool RW5 (All Sizes)
Vendor
Rockwool
Regular price
from £408.00 £489.60
Sale price
from £408.00 £489.60
Regular price
£0.00
Unit price
per 
Sold out
Celotex CW4000 Cavity Wall Insulation Board 450mm x 1200mm - All Sizes
Celotex CW4000 Cavity Wall Insulation Board 450mm x 1200mm - All Sizes - Celotex Insulation
Vendor
Celotex
Regular price
from £0.00 £0.00
Sale price
from £0.00 £0.00
Regular price
£0.00
Unit price
per 
Sold out
Kingspan Kooltherm K106 90mm x 1.2m x 0.45m
Vendor
Kingspan
Regular price
£71.85 £86.22
Sale price
£71.85 £86.22
Regular price
£0.00
Unit price
per 
Sold out
Kingspan Thermawall TW50 Cavity Wall Board 450mm x 1200mm - All Sizes
Kingspan Thermawall TW50 Cavity Wall Board 450mm x 1200mm - All Sizes - Kingspan Insulation
Vendor
Kingspan
Regular price
from £49.48 £59.38
Sale price
from £49.48 £59.38
Regular price
£0.00
Unit price
per 
Sold out
Kingspan Kooltherm Cavity Closers - All Sizes
Vendor
Kingspan
Regular price
from £17.22 £20.66
Sale price
from £17.22 £20.66
Regular price
£0.00
Unit price
per 
Sold out
Knauf Earthwool Dritherm 32 (455mm x 1200mm) - All Sizes
Vendor
Knauf Earthwool
Regular price
from £26.91 £32.29
Sale price
from £26.91 £32.29
Regular price
£0.00
Unit price
per 
Sold out
Kingspan Kooltherm K12 Framing Board (All Sizes) - 2.4m x 1.2m
Kingspan Kooltherm K12 Framing Board 1.2m x 2.4m - All Sizes - Kingspan Insulation
Vendor
Kingspan
Regular price
from £217.14 £260.57
Sale price
from £217.14 £260.57
Regular price
£0.00
Unit price
per 
Sold out
Ballytherm cavity 0.45m x 1.2m All Sizes
Ballytherm cavity
Vendor
Ballytherm
Regular price
from £52.78 £63.34
Sale price
from £52.78 £63.34
Regular price
£0.00
Unit price
per 
Sold out
Eco Cavity 0.45m x 1.2m All Sizes
Eco Cavity 0.45m x 1.2m
Vendor
Ecotherm
Regular price
from £40.19 £48.23
Sale price
from £40.19 £48.23
Regular price
£0.00
Unit price
per 
Sold out
Mannok Cavity 0.45m x 1.2m All Sizes
Quinntherm Cavity 0.45m x 1.2m All Sizes - Quinntherm Insulation
Vendor
Mannok
Regular price
from £0.00 £0.00
Sale price
from £0.00 £0.00
Regular price
£0.00
Unit price
per 
Sold out
Recticel Eurothane Cavitywall 1.2m x 0.45m - All Sizes
Recticel Eurothane Cavitywall
Vendor
Recticel
Regular price
from £32.23 £38.68
Sale price
from £32.23 £38.68
Regular price
£0.00
Unit price
per 
Sold out
Thin-R Cavity 60mm
Vendor
Xtratherm
Regular price
£29.73 £35.68
Sale price
£29.73 £35.68
Regular price
£0.00
Unit price
per 
Sold out
Speedline PVCU Ext. XPS. Cavity Closer, 100mm x 2.4m Single Ext (Pack of 10)
Vendor
Speedline
Regular price
£83.30 £99.96
Sale price
£83.30 £99.96
Regular price
£0.00
Unit price
per 
Sold out
Rockwool Cavity (All Sizes)
Vendor
Rockwool
Regular price
from £349.99 £419.99
Sale price
from £349.99 £419.99
Regular price
£0.00
Unit price
per 
Sold out
Rockwool Cladding Roll - All Sizes
Vendor
Rockwool
Regular price
from £41.04 £49.25
Sale price
from £41.04 £49.25
Regular price
£0.00
Unit price
per 
Sold out
Knauf Earthwool DriTherm 34 (All Sizes)
Vendor
Knauf Earthwool
Regular price
from £588.94 £706.73
Sale price
from £588.94 £706.73
Regular price
£0.00
Unit price
per 
Sold out
HControl Hybrid 6.7m x 1.5m x 45mm (Roll size 10m2)
Vendor
Actis
Regular price
£80.50 £96.60
Sale price
£80.50 £96.60
Regular price
£0.00
Unit price
per 
Sold out

Save More Energy Bills with Cavity Wall Insulation Materials

Cavity wall insulation installation is one of the most essential factors to keep any house thermally shielded and reduce energy bills. Cavity wall leads to the most heat loss, hence making sure to get only the best insulation materials from reliable brands. To save you the trouble here at build4less.co.uk, we stack top-notch cavity wall materials that provide lifelong thermal insulation with added acoustic and fire safety.



Our cavity wall insulation sheets come from pioneering manufacturers such as Celotex, Knauf Dritherm, Rockwool, Quinntherm, Isover, Kingspan and more that live up to their reputation by providing products that meet precise U-value requirements, providing superior thermal insulation for a lifetime.


Build4less.co.uk is UK's one-stop-shop for all insulation needs. We offer top insulation products from superior brands at a deal price. Don't forget to check out our deals and offers.



More about Cavity Wall Insulation
We use cookies to ensure that we give you the best experience on our website. By continuing to browse our site we'll assume that you understand this. Learn more
Accept