Unfortunately, due to a combination of factors including rogue installers, there are many properties in the UK that have cavity wall insulation installed that were unsuitable for the measure. This has led to a number of problems across the country, including damp and condensation.
Thankfully you don't have to just live with this forever - insulation can be extracted from the wall, and if necessary a more suitable material installed.
Wind and driving rain against exposed brickwork can damage bricks, or more commonly, the pointing, allowing water through the wall and into the cavity. Some of the materials used in the past, particularly anything fibre-based, can absorb and hold this water, allowing it to cross the cavity to the inner walls of the home, causing damp problems.
Extracting the cavity wall insulation is a quick, clean process, completed from the outside of the property. Compressed air is blown into the wall through drill holes, and the insulation is removed via strategically removed bricks at the bottom of the wall. Once the process is completed, the brickwork is repaired.
Replacing the Insulation
If you have a suitable cavity, and the issue was simply the material, then the cavity can be refilled with a more suitable material. In all cases, we use an oil-based,waterproof expanded polystyrene bead, which is bonded together with glue as it is pumped into the wall. This means that any water that does make it's way into the cavity via cracks in the brickwork or pointing cannot bridge the cavity, and simply drains through the natural gaps in the insulation to the bottom of the cavity and into the ground, as intended.
All of our cavity wall insulation comes with a 25 year, insurance-backed guarantee.