External WallsInternal and Separating Walls 

Product description

ROCKWOOL® Cavity is a semi-rigid full fill insulation solution for masonry cavity wall construction, suitable for use in new builds or extensions. It is easy to handle and install and provides a close fit against brick and blockwork. The product consists of a lightweight insulation batt available in a range of thicknesses. Advantages

  • BBA certified for all exposure zones
  • Acts as a cavity barrier
  • Prevents water transmission from the outer to inner leaf
  • Outstanding thermal and fire insulation
  • Non-combustible (Euroclass A1)
  • Superior fit against blockwork
  • No sagging or slumping

How to use this product

ROCKWOOL® Cavity achieves excellent thermal performance and provides fire protection for brick and block cavity walls in domestic and commercial buildings. It also significantly reduces the risk of condensation.

Performance & properties

Property
Thermal Properties

ROCKWOOL® Cavity has a thermal conductivity (K value) of 0.037W/m2K. For Thermal performance and U-values and more information about applications see Part L Guide or product datasheet.

Fire Properties

ROCKWOOL® Cavity achieves a reaction to fire classification of A1 as defined in EN 13501-1 European fire classification. No additional fire cavity barriers are required when using full fill cavity.

Green Guide Rating

ROCKWOOL® Cavity corresponds to the BRE Global Green Guide online generic specification ‘Stone wool insulation - density 45 kg/m³ ’ (ref. 815320008) which achieves a summary rating of ‘A+’ within all building types.

Water Repellency

The orientation of the water repellent fibres will prevent water crossing the wall construction. Provided the batts are correctly installed and sound building techniques are applied to the cavity wall construction, any water penetrating the outer leaf will drain down the surface of the batts.

Third Party Approvals

ROCKWOOL® Cavity Insulation has the following third party approvals: BBA MSDS ISO Responsible Sourcing CE see Certifcate fore more details. KeyMark LPCB 022e (Loss Prevention Certifcation Board) KM 06661 (KiteMark) LUL see Certificate for more information. Please refer to the Certificate Library for more information.

Ozone Depleting Potential

Relying on entrapped air for its thermal properties, we are proud to say that ROCKWOOL® Cavity does not contain (and has never contained) gases that have an ozone depleting potential (ODP).

Global Warming Potential

Relying on entrapped air for its thermal properties, we are proud to say that ROCKWOOL® Cavity does not contain (and has never contained) gases that have a global warming potential (GWP). Therefore, they have a zero GWP for the purposes of rating schemes such as the Code for Sustainable Homes.