Rockwool Cavity Batts
Full fill cavity 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).
General information about Rockwool Cavity Batts
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.
Durable non-combustable stone wool spun from volcanic rock with water repellent additives which prevent moisture transmission
|Thermal Conductivity||0.037 W/m·K|
|Nominal Density||approx. 45 kg/m³|
|Fire Performance||Classification A1||BS EN 13501-1|
|Surface Spread of Flame||Non-combustable|
Buy Rockwool Cavity Batts
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
Please observe the 'Star Rating' indicators to assess availability.
Generally 1 or 2 days for delivery
Generally 1 to 5 days for delivery
Generally 5 to 10 days for delivery
Generally 5 to 15 days for delivery
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 Certification, Downloads, and Installation Guides
While we have provided Thermal Resistance values for all thicknesses on the Rockwool Cavity Insulation datasheet, some thicknesses may not be readily available.
Items highlighted in green are generally held in stock at our depots.
|Rockwool Cavity 50mm||50mm||1.35 m²K/W|
|Rockwool Cavity 75mm||75mm||2.03 m²K/W|
|Rockwool Cavity 80mm||80mm||2.16 m²K/W|
|Rockwool Cavity 100mm||100mm||2.70 m²K/W|
|Rockwool Cavity 120mm||120mm||3.24 m²K/W|
|Rockwool Cavity 130mm||130mm||3.51 m²K/W|
|Rockwool Cavity 150mm||150mm||4.05 m²K/W|
Standards & Approval
Rockwool Cavity has been examined by the British Board of Agrément (BBA) and granted Certificate 94/3079 for use in all exposure zones for domestic and non-domestic buildings that are up 25m in height.
Rockwool Cavity is included within the following NBS clauses: F30:10, F30:150