Cavity Wall Extraction 2018-06-25T13:15:37+00:00

Remove failed cavity wall insulation and return your house to a dry, mould free home.

Ask us about a Cavity Wall Clearances


I engaged LMG to help re-render the front of my property, they arrived on time, finished the job pretty quickly and were clear and upfront about the project throughout. I would definitely recommend them.


Mr Walsh, Newport

Very happy with the external wall insulation work LMG has provided and at a reasonable price too. The boys were very friendly and hard working,reliable and the quality of the work is excellent. I was always kept in the loop. I will definitely be contacting them in the near future for work on the inside. Brilliant company!!


Mr Williams, Caerphilly

Very happy with the work done. Very clean no mess couldn’t fault this company. Recommend LMG Home Improvements to anyone.


Mr Morgan, Bargoed

After 2 weeks cooling off period, the boys were here the following week, had my house hacked off to bare brick, soffit wall ties done, weather boards replaced, facias and soffits and an acrylic honeysuckle render put on. Looks really good, very happy with the price as Carmarthen builders were much more expensive. In total it took them a whole 7 days to complete the job. My neighbours are very impressed with their work. The only downfall was that I had to keep them in bacon and egg sandwiches, coffee and biscuits. 🙂 Would definitely recommend them.


Bev Harris

Recently had some insulation render put on our 2 bed terraced house. After the 2 week cooling off period the chaps were on site & had the job done relatively quickly & for a very competitive price. We’re very happy with our Ardente colour which has set off a mini trend on our street.

I would definitely recommend LMG. We’ve got them back on site in a week to render our extension (which we couldn’t do at the same time due to works on our shed)


Christian Skallion

Want to say a massive thank you to all the guys at LMG Home Improvements! I’m extremely happy with the outcome! The guys on site have been fantastic throughout and a real credit to your company. Will happily recommend to anyone.


Mark Falkingham

LMG provided a good, reliable quotation for the works that was in line with other quotes obtained. The quality of the insulation and rendering work completed is excellent; including the detailing around windows, pipes and roof line.

Communication with LMG was excellent throughout, with regular updates at each stage of the work. The professionalism of the communication was greatly appreciated, long with helpful advice on the technical points of the insulation system.

Highly recommended.


Richard Baker, Swansea

We are very pleased with the finished rendering to the front of our house, so we are planning to have LMG do the back next year.

The workmen were very friendly, easy to talk to and listened to our requirements, telling us what would happen, why and when. We felt they had pride in their work.


Dave Fuller, Cwmbran

Very happy with the work done. Very clean and no mess. Couldn’t fault the company. Recommend LMG Home Improvements to anyone.


David Morgan, Bargoed

How is cavity wall insulation removed?

We can remove all types of cavity wall insulation including mineral fibre like Rockwool and whitewool. We can also remove urea formaldehyde and polybead type insulations.

Following an initial inspection, if defects are found, a team will arrive on site and following their risk assessments will proceed to drill out the property. It will be drilled in a specialist pattern using original holes where possible. It will be necessary to open up vents and remove bricks at designated spots just above damp course level to allow exit points for the insulation to be removed.

Through the holes that are drilled, the operatives will drive compressed air through a rubber agitating whip and directional nozzle to break up and move the material to the exit points opened up.

An industrial vacuum then collects the material from the exit points and the operatives will work in a set pattern to move through the cavity ensuring that the material is removed.

The bricks are then replaced or vents installed dependent on our customers requirements

The material is pumped into net stocking which is tied up and removed from site via our waste carrier licence and a clean down of the pathways around the property is completed to ensure any debris is cleaned up.

We can also provide photographic evidence if requested in advance of the inside of the cavity once the insulation is removed.

Process Summary

  • Pre Site Inspection.

  • Holes drilled over property.

  • Brick and vents removed just above damp course level to allow the material to be removed.

  • Compressed air blown through cavity using an agitator whip and directional nozzle to break up material.

  • Industrial vacuum used to suck insulation out of bottom of cavity.

  • Bricks and vents replaced.

  • Material is bagged and removed via our waste carrier licence.

  • Property is cleaned down.

  • Photographic evidence from our specialist borescope equipment can be provided on request.

LMG Home Improvements Ltd have been making homes cosier in the following areas

  • Aberdare
  • Abergavenny
  • Blackwood
  • Brecon
  • Bridgend
  • Bristol
  • Builth Wells
  • Caerphilly
  • Cardiff
  • Carmarthen
  • Chepstow
  • Cwmbran
  • Ebbw Vale
  • Gloucester
  • Haverfordwest
  • Hereford
  • Lampeter
  • Llandrindod Wells
  • Llanelli
  • Maesteg
  • Methyr Tydfil
  • Milford Haven
  • Monmouth
  • Neath
  • Newcastle Emlyn
  • Newport
  • Pontypool
  • Pontypridd
  • Swansea
  • Treorchy

External Wall Insulation

If you have a property built before 1940, the chances are it is built from stone or solid brick and is poorly insulated. As well as making your home cosy and warm, External Wall Insulation provides a brand new finish to your house in a choice of colours.

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Rendering & Facades

Give your property a facelift and prevent any nasty damp from penetrating into your brickwork through cracked render. We offer a range of options for rendering and facades for terraced, semi detached and larger properties.

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Cavity Wall Extraction

If your property has had cavity wall insulation in the past, the chances are your home is suffering or is at risk of suffering from damp and mould. We specialise in the removal of cavity wall insulation, eliminating the causal factors of penetrating damp.

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Additional Services

In addition to providing EWI, Rendering and Facades, we are often asked to renew fascias & soffits and gutters. We also provide a cavity wall clearance service and install remedial wall-ties for cavity walls with a chequered past.

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