Cavity clearance is the process where debris, blockages or old insulating material is removed from a cavity wall. Such obstructions are found in a lot of properties and can often causes cold spots and damp issues within the home.
Most houses built in England & Wales after 1930 are constructed with cavity walls which are formed from two masonry walls with a gap between them, held together by wall ties. The construction method is intended to ensure that all moisture that may enter the cavity simply drains to the footings and safely away from the property, without ever crossing to the inner wall.
For this to work effectively, the cavity must remain completely free of debris and blockages, as such obstructions can lead to a bridge being created in the air space between the two thicknesses of masonry, resulting in moisture being transferred to inner walls rather than draining as intended. Such moisture penetration can cause a range of problems in the home, such as damp and mould issues.
This is why Extract Insulation developed a cavity wall clearance system. This solution can remove blockages in a cavity wall, ensuring the cavity operates as it should in addition to preparing it for the installation of cavity wall insulation. At this point it is important to note that cavity wall insulation does not fill the cavity in a way that bridges the air space. In fact, our bead insulation material fills the cavity in such a way that any moisture that enters, trickles down the beads and drains away as intended.
Obstructions in a cavity wall can form for many reasons, including:
The cavity had not been cleared properly during construction.
Building work, such as replacing windows or fitting a conservatory, result in debris being left behind in the cavity
During general home improvements, such as fitting a vent of balanced boiler flue
The Extract insulation system has several benefits:
Suitable for use on most cavity constructed properties.
Resolves existing damp transference issues through clearance of existing debris
No maintenance is required
If you have damp issues, would like to upgrade your existing insulation or have any other reason to believe your cavity may require clearing, please book a free survey with us. We will then call you and arrange a survey where one of our friendly surveyors will be able to provide you with more information about the process and benefits of clearing your cavity wall of debris.
We’ve been working in the industry for over two decades and have honed our experience to other our customers tailored, complete solutions that are accredited and carried out by professional teams.
If your property is suffering from penetrating damp and mould - it's one of the main signs that you should contact a professional to assess your existing cavity wall insulation. We will give you a free no-obligation survey!