Cavity wall insulation extraction

How to spot cavity
insulation issues

Does your home have any of the following?
  • Condensation on the inside of your windows
  • Damp, dark or wet patches appearing on interior walls
  • Mould or fungus around windows or along walls or ceilings
  • External damage to brick work or rotting cladding

If so you could claim compensation. We can help.

Get in touch
Cavity wall insulation extraction specialists
Mouldy walls
Need help with Cavity Wall Insulation
Cracked brickwork


With over 11 million properties around the UK having had cavity wall Insulation installed, the benefits speak or themselves. However, our damp climate can take
its toll on brickwork, leading to both external damage and water leakage. If left untreated, prolonged water penetration can affect some types of cavity wall
insulation and may result in damp problems affecting inner walls. If mineral wool insulation becomes permanently damaged, the only real solution is to remove it.

The damaged cavity wall insulation material is removed as unobtrusively and cleanly as possible. Compressed air is blown into the cavity while an industrial vacuum collects the damaged insulation from the bottom of the wall through strategically removed bricks.

A boroscope is used to inspect the cavity throughout the process to ensure all damaged insulation has been completely removed. The old insulation is then bagged up and removed, while all the brickwork is made good.

There are several different types of cavity wall insulation on the market, and the cost and difficulty of removal can vary depending on the type of insulation present in your home. Removing Blown mineral fibre Insulation Mineral fibres are rigid, water repellent insulation materials most commonly used in exterior walls. Although they have strong insulating properties, they can cause major issues if incorrectly installed.

If the material is blown at the wrong pressure or an incorrect drill pattern is used, homeowners can be left with large cold patches and voids in the wall where heat can escape and damp can sneak in.

Damp problems are the main reason customers call us for cavity wall insulation removal. It is usually caused by poorly maintained exterior brickwork, severe exposure to wind and rain, lack of protection from other buildings and trees, or a combination of the three. Also with the recent spell of flood weather once cavity wall insulation is wet it must be removed from the property as quickly as possible.

Damp, deteriorated or poorly installed cavity wall insulation can have major negative consequences for your home, from unsightly damp and mould to increased energy bills as a result of inefficient heat retention..

Happy Customers from the Boiler People


At The Boiler People we understand that there’s no such thing as a ‘one size fits all’ approach when it comes to your home. That’s why we provide personally tailored quotes for Cavity wall insulation extraction based on the size and scale of the job at hand – meaning you only pay for the work we carry out.

A standard extraction on a typical domestic property will take around 2 days subject to weather conditions. The Boiler People employ our own in-house team of technicians that have a wealth of experience within the house building sector, we are able to offer a varied service that includes:

  • Damp proof course installation and replacement
  • Part or full house re-pointing
  • Damaged/distressed brick replacement
  • Along with a host of other improvements/repairs
    to enhance your homes warmth and comfort

Depending on the material used in the cavity, homes are usually priced per square meter:

Semi detatched home90m2
Mid sized home55m2
Detatched home130m2
Semi detatched bungalow65m2
Detatched bungalow90m2