Worried about your cavity walls? Talk to the experts...

Failed cavity wall insulation could be causing long-term damage to your property. Don’t leave it untreated – get help from Complete Remedial Solutions today.

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Banish black mould on the walls


Remove problems with condensation


Fix faulty cavity wall insulation

What are your walls hiding?

Spot the key signs of failed cavity wall insulation and take action
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Black mould visible on ceilings

image of damp on internal walls

Damp on internal walls

image of black mould visible on walls

Black mould visible on walls

image of cold spots caused by poor insulation

Cold spots caused by poor insulation

If left, poorly installed cavity wall insulation will get worse over time and could:
  • Reduce the value of your property
  • Cause major structural problems
  • Reduce heat retention and increase fuel consumption
  • Result in wet walls, causing damp, mould and condensation
  • Affect your health
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Expert diagnosis of cavity wall problems

Fully accreditated to extract cavity wall insulation and protect your property from any further damage

Free inspection of your home with a visual of the problem means you understand what needs to be done before proceeding with any work

A highly qualified team with over 50 years’ experience in insulation, for expert advice and quality work on properties around the UK

Failed insulation removed to ensure that damp and mould doesn’t return and your home is warm and dry again

If Suitable we can also reinstall the correct insulation to the highest standard to save energy and money on your heating bills

Full certification and completion report provided evidencing a complete, clear cavity

Our 5 Star Service

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The Right Tools


We use specialist insulation extraction machinery, ensuring a first time fix for all properties.

The Right Price


We quote for a complete service, including removal of any rubble and replacement of bricks where required, with a competitive pricing structure to fit around your budget.

The Right Experience


CRS are a fully certified company and our staff hold accreditions recognised throughout the industry. We only employ experienced technicians to get the job completed to the very highest standards, first time.

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...and no cowboys

We have seen people removing bricks and ramming metal rods into the walls in an attempt to dislodge and remove insulation. Don’t compromise on quality! Get the job done correctly and call in the professionals.

Trusted by Social Housing Providers

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Millions of homes have had cavity wall insulation installed over the years but not all were actually suitable. Working with housing associations, local authorities and registered social landlords, Complete Remedial Solutions is committed to making damp, cold and unhealthy homes a thing of the past.

Locate your nearest specialist depot

We have specialist teams in your area.
See our list below
  • Carmarthen
  • Swansea
  • Bridgend
  • Cardiff
  • Brecon
  • Newport
  • Bristol
  • Taunton
  • Exeter
  • Plymouth
  • Truro
  • Pembroke
  • Hereford
  • Swindon
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Working with you every step of the way

Our friendly, professional service ensures you understand the cause of the problem and the best way to save your property from any further damage.


Free property inspection to identify the cause of unexplained damp and mould or other problems. We provide a visual so you can see the issue.


A full report with recommendations on how to resolve the issue helps you make an informed decision to protect your home.


Removal of failed insulation nips trouble in the bud and leaves you with a warm, dry home. We can also install new insulation to a high standard to reduce heat loss and save on bills.


An optional final report from a chartered building surveyor confirms the quality of the job. They can also advise on the suitability for reinsulating the property.

Rescuing homes from damp and mould

Complete Remedial Solutions has a combined industry experience of over 50 years helping property owners identify any problems with their cavity walls before it causes lasting damage. We inspect and restore homes across the UK, removing failed insulation to create a warmer and healthier living space.

  • "Complete Remedial Solutions did a great job. The whole team was tidy and professional, explaining every step of the process. Thanks to you, our home is dry and warm again. No signs of mould returning."

    Mrs K Smith, Swansea

  • "Our walls were black with mould and everything was wet with condensation, but we didn’t know why until we called Complete Remedial Solutions. The team was fast and efficient, working hard to get the job done. All the worry about our house is gone, thanks to the great work your team did."

    Mr B Wallis, South Wales

  • "Couldn’t be happier with the work carried out by your team. Your inspection revealed failed cavity wall insulation, which was the cause of damp and mould. The team worked incredibly hard to remove everything, but now you can’t see any signs of the work or the problems we had. I’d highly recommend you to anyone worried about damp on their walls."

    Mr J Kahn, Cardiff

  • "A polite, helpful team who went the extra mile to remove all of the faulty insulation, which was causing us a lot of problems. Once we called Complete Remedial Solutions we knew you were experts who would take care of it and you did just that. Can’t thank you enough for restoring our home and taking all the stress away."

    Miss A Daniels, Hereford.


Cyfoeth Naturiol Cymru, Natural Resources Wales Oscar® - On site competency assessment report approved Stroma Certifieed Chas® Constructionline - a uk government certification service BBA


Wales (Cymru) Energy Efficiency & Healthy Homes - Regional Awards 2017 - Energy Efficiency Champion of the Year Wales (Cymru) Energy Efficiency & Healthy Homes - Regional Awards 2017 - Energy Consultant of the Year

Frequently Asked Questions

Our team is just a click away if you need any advice about your cavity walls, but here are some answers to the questions our customers ask most.

  • Why does my cavity wall insulation need to be removed?
    Cavity wall insulation is a popular way for people to improve the energy efficiency of their homes and save money on their energy bills. However, not all companies are up to the job and those who don’t comply with best practice leave property owners with a whole host of problems caused by poorly installed cavity wall insulation.

    Not every property can have cavity wall insulation, but a less than scrupulous company or one without the proper training will ignore this or may do a poor quality job. For instance, steel frame houses should never have cavity wall insulation installed, so this could be one reason why your insulation needs to be removed.

    If your property has been flooded, this can damage the insulation, causing ongoing problems. There may also be rubble in the cavity, which is causing damp and compromising the insulation. Fortunately, our free inspection will identify any of these issues and our team will explain everything with a visual of the cavity wall.

    The good news is that we can remove cavity wall insulation if it’s causing problems.
  • What sort of problems are signs of failed cavity wall insulation?
    Sometimes cavity wall insulation is badly installed, degrades over time or your property may not be suitable, which can lead to issues. Left unchecked, failed cavity wall insulation can lead to damp and mould, which can have serious implications for the structure of the property, impacting on its value.

    If you have any of the following problems in your property, it could be caused by cavity wall insulation:

    • Cold spots on walls, caused by areas where the cavity wall is not correctly insulated
    • Trouble with excess condensation, causing damp problems inside the property
    • Black mould on the walls caused by the damp
    • Peeling wallpaper and bubbling paint from wet walls
  • How do you remove cavity wall insulation?
    The problems caused by failed cavity wall insulation can be stressful for homeowners, but with fast action, it is possible to remove cavity wall insulation and restore the property to its previous state. Complete Remedial Solutions is fully accredited to carry out the removal to the highest standards using the latest technology.

    We take great care to ensure the cavity wall insulation removal is as clean and effective as possible, leaving your home looking better than ever. We start by carefully removing bricks from the bottom of the wall. Compressed air is blown into the cavity and then we use an industrial vacuum to extract all the damaged insulation and any debris through the gap. All the brickwork is replaced to ensure nobody can see we were ever there, except that your home is warm and dry again.
  • Can you reinstall cavity wall insulation after it’s been removed?
    The Complete Remedial Solutions team has over 50 years' industry experience working for the leading insulation companies. We can also reassess your property's suitability to reinstall it if possible.
  • How do I know the work won’t cause more damage?
    Complete Remedial Solutions are experts in solving the problems caused by failed cavity wall insulation. The company was formed to meet the demand from customers who were having problems after having cavity wall insulation installed. Our aim is to help people and property owners reduce heating demand and make their homes healthier.

    As well as a wealth of industry experience, Complete Remedial Solutions is fully accredited by the British Board of Agrément (BBA), Stroma certified as quality installers and assessors for the energy industry. We also have CHAS certification, which means we comply with the latest health and safety guidelines for work with private and public sector organisations. For a full list of our accreditations and awards please go here.

Concerned about your cavity wall insulation?