Rockwool Cavity Wall Batts

Share this
  • Size of boards: 455 x 1200mm
  • Thermal, acoustic and fire performance
  • Cavity wall insulation
  • Non-combustible
  • Superior fit against blockwork
  • Dimensionally stable – no slumping
  • Water repellent
  • Rockwool Cavity Wall Batts are sold per pack

Rockwool Full Fill Cavity Wall Batts

Rockwool cavity wall insulation is a semi-rigid, full fill insulation solution for external masonry cavity walls and for the thermal insulation and acoustic protection of masonry party walls between dwellings. Offering excellent thermal performance, the Cavity Wall Batts slow the rate of heat transfer, effectively maintaining the thermal comfort of your home while also providing superior sound protection. 

Rockwool Full Fill Cavity Wall Batts are lightweight, easy to handle, quick to cut and provide a close fit against brick and blockwork. The insulation is also completely water repellent, thereby preventing the passage of water from the outer to the inner leaf. 

If you’re looking for a cavity wall insulation material with excellent fire safety properties, the Rockwool Cavity Wall Batts are the ideal solution. Rated as Euroclass A1 completely non-combustible, this is one of the safest insulation materials on the market, actively preventing the spread of flames during the event of a fire. 

Technical specification

  • Composition: semi-rigid mineral wool
  • Thermal conductivity: 0.037 W/m2K
  • Reaction to fire: Euroclass A1
  • Size of boards: 455 x 1200mm
  • Thicknesses available: 50mm, 75mm, 80mm, 100mm, 150mm

Coverage Per Pack

Thickness (mm) Boards per pack m2 per pack
50 12 6.55
75 9 4.91
80 8 4.37
100 6 3.28


Rockwool Cavity Wall Batts should be installed in accordance with the manufacturer’s installation guidelines – these should cover design and all aspects of the application of the insulation. 


Shelf life: please see the manufacturer’s date of expiry. Keep in a dry place, in the original packaging. Avoid excess heat or UV light exposure.


50mm, 75mm, 80mm, 100mm


Write a review

There are no reviews yet.

Browse product categories