Cavity wall insulation keeps homes warmer and drier, which in turn reduces energy bills. If your home has cavity walls then it is important to get the insulation installed correctly, as incorrect installation can lead to damp problems and even structural issues like cracks in walls.
A reputable installer will check the property’s suitability for cavity wall insulation before the works begin. They will also carry out a pre-installation assessment to ensure that the work is carried out according to stringent technical standards set by CIGA.
To carry out the work an approved installer will drill holes in your property’s external (outer leaf) wall in a pattern that is determined by the construction and size of your house. These holes are then filled with Expanded Polystyrene (EPS) bonded bead using an adhesive that is tested for flow rate on each job site. The bead is then placed in the cavity and the adhesive is pressed to the sides of the hole to create a seal, ensuring the best possible fit and performance.
The wall ties are then installed into the drilled holes in an ‘E’ shape across the width of the cavity. This is to prevent the EPS from shifting within the cavity. The ties are then fixed to the wood framing or metal wall tie bar. The ties are then tested for both the correct length and adequate embedment in the mortar joint, which is vital to ensure proper function and longevity of the wall tie. cavity wall installer