Cavity Insulation
Cavity wall insulation is essential for minimising heat loss, enhancing energy efficiency and cutting heating costs. Whether you’re working on a new build or a refurbishment, opt for our high-performance cavity insulation for smooth installation and lasting thermal protection.
Explore cavity slabs, roll and foil from dependable brands, such as Recticel, Superglass, Knauf, Isover and EcoTherm. Order today to take advantage of our bulk discounts, or check out our slimmer Kooltherm insulation, ideal for projects with space constraints.
Cavity Insulation
Recticel 50mm Eurothane GP PIR Insulation Board 2400 X 1200 X 50mm
Free Delivery on orders over £150 on all standard size PIR Insulation (25,50,75,90 & 100mm) 1-2 working days
Alternative brands of the product may be supplied, please advise if this is an issue.
Cavity Insulation
Recticel 25mm Eurothane GP PIR Insulation Board 2400 X 1200 X 25mm
Free Delivery on orders over £150 on all standard size PIR Insulation (25,50,75,90 & 100mm) 1-2 working days
Alternative brands of the product may be supplied, please advise if this is an issue.
Cavity Insulation
Recticel 100mm Eurothane GP PIR Insulation Board 2400 X 1200 X 100mm
Free Delivery on orders over £150 on all standard size PIR Insulation (25,50,75,90 & 100mm) 1-2 working days
Alternative brands of the product may be supplied, please advise if this is an issue.
Cavity Insulation
Recticel 40mm Eurothane GP PIR Insulation Board 2400 X 1200 X 40mm (10 Sheet Minimum)
Delivery 2-3 working days
Alternative brands of the product may be supplied, please advise if this is an issue.
Cavity Insulation
Delivery: 7 working days
Cavity Insulation
Recticel 30mm Eurothane GP PIR Insulation Board 2400 X 1200 X 30mm (10 Sheet Minimum)
Delivery 2-3 working days
Alternative brands of the product may be supplied, please advise if this is an issue.
Cavity Insulation
Delivery: 2-3 working days
Cavity Insulation
Recticel 75mm Eurothane GP PIR Insulation Board 2400 X 1200 X 75mm
Free Delivery on orders over £150 on all standard size PIR Insulation (25,50,75,90 & 100mm) 1-2 working days
Alternative brands of the product may be supplied, please advise if this is an issue.
Cavity Insulation
Recticel 90mm Eurothane GP PIR Insulation Board 2400 X 1200 X 90mm
Free Delivery on orders over £150 on all standard size PIR Insulation (25,50,75,90 & 100mm) 1-2 working days
Alternative brands of the product may be supplied, please advise if this is an issue.
Cavity Insulation
Recticel 150mm Eurothane GP PIR Insulation Board 2400 X 1200 X 150mm
Delivery 2-3 working days
Alternative brands of the product may be supplied, please advise if this is an issue.
Cavity Insulation
Delivery: 2-3 working days
Cavity Insulation
Delivery: 1-2 working days
Find Trusted Supplies for Professional Wall Cavity Insulation.
Domestic and commercial buildings constructed after the 1930s typically have cavity walls – two layers of brickwork with a gap in between. Without proper insulation, heat can escape through this gap. Hence, cavity wall insulation is required to trap heat, significantly improve energy efficiency, and reduce heating bills.
Building Shop offers a comprehensive range of insulation materials suitable for partial or full cavity wall filling. Choose from durable cavity batts and rolls made from glass mineral wool or versatile PIR (polyisocyanurate) boards, which are also ideal for insulating pitched roofs and floors. Additionally, we stock specialist cavity closers from leading brands like Kingspan, which are perfect for sealing gaps around windows and doors.
Browse Our Certified Cavity Insulation Materials.
Shop confidently, knowing many of our insulation products are BBA-approved and comply with British Standards. We also offer each product in various sizes to minimise on-site cutting and waste, improving efficiency and speeding up installation. Finally, take advantage of our bulk buying options to secure the best value, and rely on our dependable delivery service to keep your project on schedule.