Cavity Wall Insulation Extraction

Cavity wall insulation is removed by using an industrial vacuum type machine; the nozzle will be positioned in the brick wall using the drilling pattern the contractor used when installing the insulation. 
For the removal of insulation contractors will start from the base of the property, working their way up in the drilling pattern from the install.It’s important to check that all the insulation has been removed and that the cavity wall is free from any materials and that an active damp course is in place.

Cavity wall extraction usually takes around two days to complete although it would depend on the size of the property.

There are certain materials than can be extracted from cavity walls which are:

• Expanded polystyrene beads
• Rockwool mineral fibre
• Whitewool glass mineral fibre
• Loose/bonded urea formaldehyde insulation

The cost to complete an extraction and re-install can cost several thousands of pounds, always check your contractor has the right certification to do this work and is registered with www.ciga.co.uk
This process will typically be done when it has been proven the install was incorrect, is causing damp or other issues, and generally will require a full extraction, clean, and reinstallation if required.