Cavity Wall insulation is essential in order to minimise heat loss and reduce heating bills. Filling the air space between the inner and outer skin of the wall with a thermally efficient insulation layer prevents heat loss, resulting in a more energy-efficient building. Any open voids within a cavity wall need to be protected from the spread of fire from adjoining dwellings, while areas of the wall that contain openings for doors and windows should be protected against thermal bridging for the most efficient result. ROCKWOOL offers non-combustible BBA certified Cavity Solutions for both partial fill and full fill masonry cavity wall applications, as well as a range of cavity closers in order to protect against thermal bridging and the spread of fire through concealed cavity walls