Price Match Guarantee
Nationwide Delivery
Secure Payments
5 star rating Rated Excellent

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
29 products
Free Delivery
on orders over £300
Celotex CW4000 Cavity Wall Insulation Board 450mm x 1200mm - All Sizes - Celotex Insulation
Celotex
Multiple Options
from £44.30 £53.16
from £44.30 £53.16
£0.00
Sold out
Free Delivery
on orders over £300
Kingspan
Multiple Options
from £98.45 £118.14
from £98.45 £118.14
£0.00
Sold out
Free Delivery
on orders over £300
Kingspan
£85.11 £102.13
£85.11 £102.13
£0.00
Sold out
Free Delivery
on orders over £300
Kingspan Thermawall TW50 Cavity Wall Board 450mm x 1200mm - All Sizes - Kingspan Insulation
Kingspan
Multiple Options
from £43.44 £52.13
from £43.44 £52.13
£0.00
Sold out
Free Delivery
on orders over £300
Kingspan
Multiple Options
from £191.40 £229.68
from £191.40 £229.68
£0.00
Sold out
Free Delivery
on orders over £300
Kingspan Kooltherm K12 Framing Board 1.2m x 2.4m - All Sizes - Kingspan Insulation
Kingspan
Multiple Options
from £252.36 £302.83
from £252.36 £302.83
£0.00
Sold out
Call to enquire
Free Delivery
on orders over £300
Recticel Eurothane Cavitywall 1.2m x 0.45m - All Sizes - Recticel Insulation
Recticel
Multiple Options
from £0.00 £0.00
from £0.00 £0.00
£0.00
Sold out
Free Delivery
on orders over £300
Quinntherm Cavity 0.45m x 1.2m All Sizes - Quinntherm Insulation
Mannok
Multiple Options
from £49.00 £58.80
from £49.00 £58.80
£0.00
Sold out
Call to enquire
Free Delivery
on orders over £300
Rockwool
Multiple Options
from £384.50 £461.40
from £384.50 £461.40
£0.00
Sold out
Free Delivery
on orders over £300
Rockwool
Multiple Options
from £595.00 £714.00
from £595.00 £714.00
£0.00
Sold out
Free Delivery
on orders over £300
Rockwool
Multiple Options
from £0.00 £0.00
from £0.00 £0.00
£0.00
Sold out
Free Delivery
on orders over £300
Rockwool
Multiple Options
from £600.44 £720.53
from £600.44 £720.53
£0.00
Sold out
Free Delivery
on orders over £300
Knauf Dritherm 37 (All Sizes) 1200mm x 455mm
Knauf
Multiple Options
from £16.39 £19.67
from £16.39 £19.67
£0.00
Sold out
Free Delivery
on orders over £300
Knauf Earthwool Dritherm 32 (455mm x 1200mm) - All Sizes
Knauf
Multiple Options
from £29.75 £35.70
from £29.75 £35.70
£0.00
Sold out
Free Delivery
on orders over £300
Knauf Earthwool DriTherm 34 (All Sizes) - Knauf Earthwool Insulation
Knauf
Multiple Options
from £1,395.00 £1,674.00
from £1,395.00 £1,674.00
£0.00
Sold out
Free Delivery
on orders over £300
Speedline
£83.30 £99.96
£83.30 £99.96
£0.00
Sold out
Free Delivery
on orders over £300
Ballytherm cavity
Ballytherm
Multiple Options
from £58.06 £69.67
from £58.06 £69.67
£0.00
Sold out
Call to enquire
Free Delivery
on orders over £300
Eco Cavity 0.45m x 1.2m All Sizes - Ecotherm
Ecotherm
Multiple Options
from £40.19 £48.23
from £40.19 £48.23
£0.00
Sold out
Call to enquire
Free Delivery
on orders over £300
HControl Hybrid 45mm x 1.6m x 6.25m (Roll size 10m2) - Actis Insulation
Actis
£79.95 £95.94
£79.95 £95.94
£0.00
Sold out
Free Delivery
on orders over £300
Unilin
£0.00 £0.00
£0.00 £0.00
£0.00
Sold out
Call to enquire
Free Delivery
on orders over £300
Thermaclass Cavity Wall 21 (1190mm x 450mm) - All Sizes - Celotex Insulation
Celotex
Multiple Options
from £1,110.00 £1,332.00
from £1,110.00 £1,332.00
£0.00
Sold out
Sheepwool Loose Wool - 5Kg Pack - Sheepwool Insulation
Sheepwool
£49.89 £59.87
£49.89 £59.87
£0.00
Sold out
Window and Door Filler Untied 200m Roll - Sheepwool Insulation
Sheepwool
£79.85 £95.82
£79.85 £95.82
£0.00
Sold out
Free Delivery
on orders over £300
High Density EPS 200E 90mm x 600mm x 1200mm (Pack of 6) - EPS External Wall Insulation.
EPS
£130.44 £156.53
£130.44 £156.53
£0.00
Sold out
Free Delivery
on orders over £300
High Density EPS 200E 80mm x 600mm x 1200mm (Pack of 7) - EPS External Wall Insulation.
EPS
£132.54 £159.05
£132.54 £159.05
£0.00
Sold out
Free Delivery
on orders over £300
High Density EPS 200E 50mm x 600mm x 1200mm (Pack of 12) - EPS External Wall Insulation.
EPS
£124.11 £148.93
£124.11 £148.93
£0.00
Sold out
Free Delivery
on orders over £300
High Density EPS 200E 40mm x 600mm x 1200mm (Pack of 15) - EPS External Wall Insulation
EPS
£124.44 £149.33
£124.44 £149.33
£0.00
Sold out
Free Delivery
on orders over £300
High Density EPS 200E 30mm x 600mm x 1200mm (Pack of 20) - EPS External Wall Insulation
EPS
£124.44 £149.33
£124.44 £149.33
£0.00
Sold out
Free Delivery
on orders over £300
High Density EPS 200E 20mm x 600mm x 1200mm (Pack of 30) - EPS External Wall Insulation
EPS
£124.44 £149.33
£124.44 £149.33
£0.00
Sold out

Cavity wall insulation is an essential component in modern construction, offering energy efficiency and comfort to buildings. At Build4Less, we provide a comprehensive range of insulation solutions tailored to meet various requirements and budgets.

Types of Cavity Wall Insulation Products

Polyisocyanurate (PIR) Boards

Products like the Celotex CW4000 and Kingspan Kooltherm series are premium PIR boards known for their excellent thermal performance and compressive strength. These boards are easy to handle and install, making them ideal for new construction and refurbishment projects.

Mineral Wool Insulation

Rockwool products, such as RW3, RW5, and Rockwool Cavity, offer superb acoustic insulation, fire resistance, and thermal properties. These are particularly suited for projects where fire safety and sound reduction are priorities.

Glass and Stone Wool Slabs

Knauf Dritherm Cavity Slabs are non-combustible, water-repellent glass mineral wool slabs that provide thermal and acoustic insulation in cavity walls. They are designed to maintain their structural integrity over time, ensuring long-lasting performance.

Expanded Polystyrene (EPS) Boards

High-density EPS 200E boards are versatile and cost-effective insulation solutions. They are suitable for various applications, including cavity wall insulation, due to their excellent resistance to moisture and high insulation values.

Cavity Closers

Kingspan Kooltherm Cavity Closers prevent thermal bridging and provide a clean finish around openings in cavity walls. These are essential for energy-efficient construction, ensuring that the insulation continuity is maintained around windows and doors.

Specialty Insulation Products

Products like Sheepwool Loose Wool and Window and Door Filler provide sustainable and natural alternatives for cavity wall insulation, offering breathability and moisture control.

Hybrid Insulation Materials

Hybrid materials such as HControl Hybrid combine insulation with a reflective surface to provide a unique solution for thermal regulation, while Thin-R Cavity offers a slim-profile PIR solution for tight spaces.

Selecting the Right Insulation

When choosing cavity wall insulation:

  • Consider the U-value requirements for your project; lower U-values mean better insulation.
  • Evaluate the fire rating needed, especially for high-risk areas or multi-story buildings.
  • Think about acoustic needs; if sound insulation is a priority, mineral wool may be the best choice.
  • Assess the space available; if the cavity is narrow, slim-profile boards like Thin-R Cavity could be ideal.
  • For eco-friendly projects, consider natural options like Sheepwool products.
Read More
This site use cookies to improve your user experience. View Privacy Policy
Accept