Double Brick Cavity Wall Insulation

Download our installation guide for cavity brick insulation.

Double brick cavity wall insulation.

In double brick the two leaves of brick walls are separated by a cavity that reduces thermal transmission and prevents moisture being transferred directly from the outside wall face to the interior of the building. The r rating thermal resistance of a double brick wall is r0 45 compared with r0 4 for brick veneer. Air cell permicav xv is specifically designed to reduce the risk of condensation in walls with cavities and has improved vapour transmission by five times compared to old technology. When the work is completed the holes are filled with mortar.

Click here for more information or call us on 1800 354 717. Cavity wall double brick insulation is a blow in insulation currently used in over 5 million homes in the uk for increasing the thermal performance of existing homes and will also work effectively in australian homes. It is therefore crucial that the insulation does not allow moisture build up. The reverse is true in summer.

Cavity wall applications page. The insulation material creates thermal mass within the walls to prevent heat transfer through convection keeping households cooler in summer and warmer in winter. 51 mm of extruded polysty rene insulation in the cavity first determine the r value of the uninsulated wall from table 2 4 22 ft hr f btu 0 74 m k w then add the cavity insulation r value. This product is installed by drilling holes in the wall between the bricks and pumping the insulation into the existing wall cavity.

Cavity wall insulation can be installed in most double brick homes during or after construction to greatly increase energy efficiency and reduce space heating costs. The most effective option for insulating double brick walls is to use a pump in loose fill wall insulation. Whilst neither fibreglass rockwool or polystyrene will hold water in the material it is the installation that can create problems. With up to 25 per cent of heat energy being lost or gained through uninsulated external walls this would be the next area to tackle after your ceiling.

The internal leaf or skin may be plasterboard lined concrete blockwork with the external skin in facing brick. As an example to determine the r value of a concrete masonry cavity wall with 8 in. 152 mm 105 pcf 1 682 kg m backup insulated with 2 in.