Rockwool Cavity Batt
Full fill cavity wall batts.
Excellent thermal, acoustic and fire insulation.
Suitable for new-build and renovations in masonry cavity and party wall applications.
Can be used in domestic and non-domestic buildings up to 25m high.
Prevents water transmition from outer to inner leaf.
Non-combustible – Euroclass A1.
Durable, rot-proof, water resistant and sufficiently stable to remain effective as insulation for the life of the building.
Does not contain gases that have ozone depletion potential (ODP) or global warming potential (GWP).
Thicknesses and Availability:
This Rockwool Range includes the following readily available product thicknesses 50mm, 75mm, 80mm and 100mm (some thicknesses may only be available in pallet quantities as they will need to be sourced from the manufacturer before being delivered to site).
The following thicknesses are manufactured to order and have minimum order requirements: 120mm (minimum order: 16 x pallets), 130mm (minimum order: 16 x pallets) and 150mm (minimum order: 14 x pallets).
Product Information
General information about Rockwool Cavity Batts
Product Application
Thermal batt for Masonary Cavity walls
Rockwools full fill cavity slab, Rockwool Cavity, is suitable for use in masonry cavity wall construction and masonry party walls between dwellings in both new builds and extensions.
Product Make-up
Core
Durable non-combustable stone wool spun from volcanic rock with water repellent additives which prevent moisture transmission.
Product Properties
| Thickness | 50mm to 130mm | |
| Slab Length | 1.2m | |
| Slab Width | 0.455m | |
| Slab Edge | Square |
Product Prices
Buy Rockwool Cavity Batt
Limited stock of the most popular thicknesses are held at most of our depots. Where we need to bring stock in from the manufacturer, please allow up to 2 weeks for delivery
- Generally 1 or 3 working days for delivery
- Generally 1 to 5 working days for delivery
- Generally 5 to 10 working days for delivery
- Special request or made to order item, allow extended lead times. Minimum order levels may apply.
- Please call to check availability and approximate lead times
Product availability depends upon stock levels at closest depot and delivery logistics to geographic locations
Product Performance and Guides
Product Performance, Manufacturer Downloads, and Installation Guides
Product Performance
| Thermal Conductivity | 0.037 W/mK | |
| Fire Performance | Classification A1 | BS EN 13501-1 |
| Surface Spread of Flame | Non-combustable | |
| Nominal Density | 33 kg/m³ | |
| Vapour Resistance | Negligable |
| Product | Thickness | Thermal Resistance | kg/m² |
|---|---|---|---|
| Rockwool Cavity 50mm | 50mm | 1.35 m²K/W | 2.25 kg/m² |
| Rockwool Cavity 75mm | 75mm | 2.03 m²K/W | 3.37 kg/m² |
| Rockwool Cavity 80mm | 80mm | 2.16 m²K/W | 3.59 kg/m² |
| Rockwool Cavity 100mm | 100mm | 2.70 m²K/W | 4.50 kg/m² |
| Rockwool Cavity 150mm | 150mm | 4.05 m²K/W | 6.75 kg/m² |
Product Certificates
Please visit the Rockwool website for product certificates.