Cavity Wall Insulation Removal & Installation
Extraction of failed cavity wall insulation and re-installation with carbon bonded bead across South Wales. The right fix for damp, mould and cold spots caused by saturated old fill.
Independent, evidence-based surveys
Failed or saturated cavity wall insulation is one of the most common hidden causes of damp and mould in South Wales homes. Old mineral fibre fill can slump, bridge wall ties and act as a sponge in exposed coastal and valley locations, soaking driving rain straight onto the inner leaf.
We extract failed cavity wall insulation cleanly using vacuum extraction through small core holes, then re-install with carbon bonded EPS bead, which is water-repellent, free-flowing and approved by the BBA.
Carbon bonded bead is the modern standard for cavity wall insulation. It doesn't slump, doesn't hold water, fills every void completely and provides excellent thermal performance, solving the damp problem and improving energy efficiency at the same time.
Signs your cavity wall insulation has failed
Damp patches on inner walls
Especially on exposed elevations after wind-driven rain.
Mould in corners & behind furniture
Cold bridging where insulation has slumped.
Cold spots
Walls feel noticeably colder in patches, a sign of voids.
Tide marks below windows
Water tracking through saturated fill.
Pre-2005 installation
Older mineral fibre fills are most prone to failure.
Coastal or exposed locations
Porthcawl, Gower, valley elevations are higher risk.
Book your cavity wall insulation quote today
Honest diagnosis from a local independent surveyor. No sales, no pressure.
Why independent surveys matter
We don't sell treatments, chemicals, or remedial work. That means our only job is to find the truth and explain it to you clearly.
We diagnose first, not every damp problem is the cavity. We'll tell you honestly if extraction won't fix it.
Carbon bonded bead is BBA-approved, water-repellent and won't slump, settle or bridge the cavity.
Extraction is clean, small core holes are drilled, vacuumed and made good with matching mortar.
Inspection → Testing → Report
Cavity inspection
Borescope inspection through small holes to confirm fill type and condition.
Extraction
Vacuum extraction of failed fill, cavity left clean and dry.
Re-installation
Carbon bonded bead injected to fill the cavity, holes made good.
Surveys tailored to South Wales
South Wales has a high concentration of properties built between 1930-1985 with cavity walls, and a wet, windy climate that punishes failed fills.
We work across Bridgend, Cardiff, Swansea, Newport, the valleys and Carmarthenshire. Coastal properties at Porthcawl, Gower and Penarth particularly benefit from upgrading to carbon bonded bead.
Get an honest answer about your property
- 100% independent, we don't sell remedial work
- Detailed written report with photographs
- Calibrated equipment and clear evidence
- Local surveyor, same-day response