Damp Problems Linked To Existing Insulation
Older cavity wall insulation can absorb moisture and transfer it through to internal wall surfaces.
Common Signs
- Damp Patches
- Mould Growth
- Peeling Wallpaper
- +1 more
Cavity Wall Insulation Removal In South Wales
If your cavity wall insulation has failed, we specialise in removing your old insulation system, across Wales and the South of England.
Specialist Extraction EquipmentCavity Inspection FirstEPS Bonded Bead Re-Fill
- PAS 2030 Certified Installations
- 25-Year Guarantee
- Insurance-Backed
- Free Quotation
- No Obligation
Get Started
Get A Free Quote
Complete our quick form and we'll arrange your free, no-obligation inspection to assess your property and recommend the right solution.
Inspection Before Extraction. If Your Problem Isn't Cavity Insulation, We'll Tell You.
We don't assume extraction is needed - and we won't sell you a service you don't need.
Cavity Inspection First
We identify the actual cause of damp or cold walls before recommending any work. Sometimes the issue isn't cavity insulation at all.
Specialist Extraction Equipment
Mechanical vacuum extraction carried out from outside your property. No internal disruption.
Optional Re-Insulation Available
If requested, we can discuss EPS bonded bead re-insulation after extraction, which comes with a 25-year guarantee.
Accredited & Trusted
Inspection Evidence
Failed Insulation Is Usually Hidden Inside The Cavity.
Moisture, slumping, bridging, and degraded cavity insulation are often not detectable from the surface alone. Inspection-scope evidence helps determine the appropriate remedial approach.
- Moisture Transfer
- Cold Spots
- Slumped Insulation
- Bridging
- Poor Installation
- Water Ingress
Is Your Cavity Wall Insulation Failing?
Damp, cold walls, mould, or staining can have several causes. During an inspection, our surveyors look for signs that existing cavity wall insulation may be contributing to the issue.
Previous Insulation Installed Incorrectly
Poor installation can leave gaps, bridging or uneven coverage that affects long-term performance.
Common Signs
- Patchy Cold Areas
- Damp After Rainfall
- Uneven Extraction Evidence
- +1 more
Cold Walls Despite Having Insulation
Slumped or degraded insulation may leave parts of the wall underperforming and noticeably colder, creating mould.
Common Signs
- Cold External Walls
- Uneven Room Temperatures
- Higher Heating Usage
- +1 more
Cracking In Render Or Mortar Joints
Wet insulation in the cavity can erode your wall ties, causing them to expand and create lateral cracking in your render and/or mortar joints.
Common Signs
- Horizontal Cracking
- Damp Near Corners
- Water Ingress
- +1 more
Not Sure Which Issue Applies To Your Property?
Our surveyors can inspect the cavity, check the likely cause, and explain whether removal, repair, refill, or further remedial work is the right next step.
How We Assess & Remove Failed Cavity Insulation
Extraction not only removes failed insulation, it gives a clear view of the cavity condition behind the walls.
Step 01 Of 04
Property Assessment
A detailed cavity inspection to check insulation condition, identify moisture concerns and flag anything that needs attention before extraction begins.
What We Check
- Existing insulation condition
- Moisture concerns or staining
- Areas needing attention before extraction
Refill options, including EPS bonded bead insulation, can be installed where appropriate.
Concerned About What May Be Hidden Inside The Walls? We Document It For You.
Following extraction, we provide a photographic cavity condition report so you have a clearer understanding of what's happening behind the brickwork.
- Visible wall tie condition
- Rubble, mortar droppings, and debris checks
- Assessment of overall cavity condition
- Identification of issues that may affect reinstatement
This helps you make informed decisions before proceeding with refill insulation or additional remedial work.
Timeline
1 to 2 Days
Team
2 to 3 Specialists
Optional
Refill Material
EPS Bonded Bead Water Repellent Insulation
Guarantee
2 Years on Extraction
Payment
Only When Work Is Complete
Not Sure If Extraction Is The Right Route For Your Property?
Get expert guidance with a free, no-obligation cavity inspection.
How It Works
1
Cavity Inspection
We inspect your property to identify the existing fill type, assess moisture levels, and determine whether extraction is the right course of action.
2
Extraction Plan & Quote
After your inspection, one of our friendly advisors will give you a call to discuss the findings, explain your clear quote, and talk you through what happens next. There is no obligation to proceed.
3
Extraction & Report
We remove failed material with specialist vacuum equipment. The report will provide clarity on the cavity's condition post-extraction.
4
Guarantee & Documentation
You receive full completion records, including guarantees and warranties.
Document
Post-Extraction Findings Report
Post-Extraction Report
Your Cavity Condition Report Helps Determine The Next Step
Once extraction is complete, we assess the exposed cavity to determine whether re-insulation is appropriate or whether further remedial work should be considered first.
Cavity Wall Condition Assessment
Inspection findings help determine whether the cavity is suitable for refill insulation.
Moisture And Bridging Observations
We assess signs of moisture transfer, debris, bridging and historic installation issues.
Suitability For Bonded Bead Refill
Recommendations are based on cavity condition, ventilation and overall property exposure.
Identification Of Further Remedial Work
Where required, we may recommend additional remedial measures before or after re-insulation.
Not Every Cavity Is Suitable For Refill Insulation
Some properties might need a bit more work before they can be re-insulated, like fixing masonry, improving ventilation, or clearing cavities. Since CRS Energy also handles damp remediation, ventilation, and insulation work, we take a look at the overall condition of the property instead of just suggesting one fix by default.
Modern Re-Insulation Systems
Benefits Of Modern Bonded-Bead Reinsulation
After failed insulation has been removed, some homes may be suitable for a modern bonded-bead refill. Where appropriate, this can help improve warmth, reduce gaps in the cavity and provide a water-repellent insulation system.
Only recommended after the cavity has been checked and confirmed as suitable.
1
More Even Cavity Coverage
Bonded EPS beads are designed to flow through the cavity before bonding together.
- Helps reduce gaps and cold spots
- Provides more consistent insulation coverage
- Can perform better than some older fibre-based fills
2
Water-Repellent System
Modern bonded-bead systems are designed to resist moisture movement in suitable cavity walls.
- Water-repellent EPS beads
- Helps reduce the risk of moisture transfer
- Suitable for exposed locations when specified correctly
3
Improved Warmth And Comfort
Where the property is suitable, reinsulation can help restore the purpose of the cavity wall system.
- Helps retain more heat inside the home
- Can improve comfort around colder external walls
- Supports better long-term insulation performance
Diagnosis Before Remediation
We don't assume extraction is needed. Our inspection determines the root cause first. If the problem is not related to cavity insulation, we'll tell you. All extraction and re-fill work is carried out under PAS 2030 with independent guarantees.
Real Homeowner Reviews
Loved By Homeowners, Trusted By Experts
We're proud to help South Wales homeowners protect the property they live in every day. Here is what some of our customers have shared after working with us.
Typical 1-Day InstallPAS 2030 Certified25 Year Guarantee
“We had cavity wall insulation done which has made a big difference to our house. Our rooms were cold and we had some mould in corners of the rooms. Since having it done there hasn't been any. House warms up quicker and stays warmer longer. So glad we had it done and it was quick and easy. CRS were lovely and I would recommend them to anyone.”
“This company carried out the work on our house for a Welsh government grant scheme, the work was carried out between July and September for a new boiler and internal wall and cavity wall insulation. Every one of the workers in the different teams, including the plumbers, electricians, insulation team, carpenters, plasterers, and the painter were all very polite, friendly and respectful of our property. We would highly recommend them.”
“I cannot praise this company too highly. From first contact to completion of the work the whole experience was perfect. People turned up when they were supposed to and were all friendly, good-humoured and respectful, and they knew what they were doing. All three teams that carried out the work were well coordinated and efficient. And they all cleared up after them! Great coordination between the office and the survey and work teams.”
Every review above is published on our public Google or Trustpilot profile, or was sent to us directly by the customer, as marked on each card. View On Google or View On Trustpilot.
Transparent Pricing
Every Quote Is Built Around Your Property - Not A Price List.
No guesswork. No off-the-shelf packages. We measure, assess, and quote based on your home's actual floor area and construction type - so you only pay for what's needed.
Floor area (m²)
The primary measure - total heated floor space determines the scope of works.
Insulation type
Cavity wall, loft, internal wall, room-in-roof - each has a different material and labour rate.
Construction type
Cavity, solid brick, timber frame - affects product choice and install method.
How It Works
- 1We attend your property and measure the floor area
- 2We assess construction type and insulation suitability
- 3Your written quotation is issued - priced per m²
- 4No obligation - no hidden extras
Ready To Get Your Quote?
Get in touch and we'll arrange a visit. We'll measure up, assess your property and give you a clear, itemised quote - calculated on your actual floor area.
Have Questions? We're Here To Help.
Speak to a surveyor directly - no sales pitch, no obligation.
Frequently Asked Questions
Common signs include damp patches on internal walls, cold spots, mould growth, and peeling decoration on external-facing walls. Our inspection will confirm whether extraction is needed.
Extraction typically takes 1-2 days depending on the property size. Re-filling with EPS beads is usually completed on the same visit or the following day.
£ Finance
Finance Options:
Spread The Cost
Monthly payment options are available for cavity insulation extraction and reinstatement projects, provided through our partner Ideal4Finance, with 0% finance available on selected agreements.
Choose a term that suits your household, see the full agreement before you commit, and pay a fixed monthly repayment for the length of the term.
Finance is a regulated credit agreement arranged through Ideal4Finance. You apply directly, the agreement is subject to status, and you'll see the full terms, including the total amount repayable, before you sign anything.
Your Payment Options
Monthly Payment Options
Spread the cost over an agreed term with a fixed monthly repayment.
Full Terms Up Front
Every agreement shows the complete cost and term before you commit.
No Obligation
Finance is a payment option, not a requirement. You can pay for your installation without it.
Find Out If You're Eligible
Enter your postcode below to check your eligibility and explore finance options for your installation.
Book Your Free Extraction Inspection
Complete the form and we'll arrange your free, no-obligation quotation. Or call 01656 338507.
A written cavity wall inspection report is available from £99 on request, not required for a quotation.