Cavity Wall Insulation involves filling the gap between your walls with the insulation material of your choice. You can choose from mineral wool, polystyrene beads, and foamed insulants.
To insert the insulation material into the wall cavity, small holes around 23 millimeters in size must be drilled in the mortar joints of your walls. For maximum coverage, the holes should be roughly 1.5 meters apart.
Once the holes are drilled, the installers will blow the insulation into the cavity using specialized equipment. Once the cavity is full of insulation material, the holes must be filled-in, to prevent moisture from seeping in. The entire process takes about 2 hours and if done properly, no further maintenance will be needed.