Loft & Cavity Mineral Wool

Isover Spacesaver Loft Roll 100mm 14.13m²
Product code: BSC-60007329

£51.50 £42.92

/ Each
Isover Spacesaver Loft Roll 150mm 9.34m²
Product code: BSC-60007431

£50.92 £42.43

/ Each
Isover Spacesaver Loft Roll 200mm 6.03m²
Product code: BSC-60007432

£43.55 £36.29

/ Each
Isover Acoustic Partition Roll 25mm 24.00m²
Product code: BSC-60007433

£73.32 £61.10

/ Each
Isover Acoustic Partition Roll 50mm 15.60m²
Product code: BSC-60007434

£73.32 £61.10

/ Each
Isover Acoustic Partition Roll 100mm 11.00m²
Product code: BSC-60007435

£82.66 £68.88

/ Each
Isover Acoustic Partition Roll 75mm 14.64m²
Product code: BSC-60007436

£99.02 £82.52

/ Each

About Our Loft & Cavity Mineral Wool

Loft and cavity mineral wool remains one of the most widely specified insulation materials across domestic and commercial builds, valued for its thermal performance, acoustic control, and ease of installation. Suitable for both retrofit and new-build applications, mineral wool insulation supports compliance with current building regulations while helping improve energy efficiency and internal comfort.

With fast delivery options and the ability to collect from a nearby branch, it’s easy to keep insulation works moving without delay.

Mineral Wool Insulation Range

Mineral wool is used extensively across floor, loft and wall build-ups due to its versatility and forgiving installation tolerances. It can be friction-fitted between joists or studs, trimmed accurately on site, and layered to achieve the required U-values without complex fixings.

Mineral wool loft insulation is designed to be laid between and over ceiling joists, reducing heat loss through the roof space while maintaining breathability. Products such as combi rolls allow installers to achieve multiple thicknesses efficiently, making them suitable for both top-up insulation projects and full upgrades. The flexible structure helps accommodate irregular joist spacing, pipework, and services, ensuring continuity of coverage across the loft area. Acoustic performance is an added benefit, particularly in multi-occupancy or conversion projects where sound transfer through floors is a concern.

Mineral wool cavity wall insulation is used within timber and masonry wall systems to improve thermal performance and reduce cold bridging. It is commonly specified for its fire resistance, moisture handling properties, and ability to maintain performance over time. When correctly installed, mineral wool cavity products help regulate internal temperatures while supporting vapour permeability within the wall structure. This makes them a practical option for both traditional builds and modern construction methods where breathability is a priority.

The wider insulation category includes other products to support complete thermal and acoustic build-ups, helping streamline material selection across the project.

Order Wool Insulation Online

Order mineral wool insulation online at the Builders Supply for fast local delivery or collection, with trade account benefits available.

Any questions? Feel free to get in touch.