We extract failed cavity wall insulation from homes in Childwall, Belle Vale, Netherley and the L16 area. Childwall is mostly twentieth-century suburbia, with a high proportion of inter-war and post-war semis and detached houses built with brick cavities. When those cavities were filled and damp followed, we inspect, explain the cause and remove the fill if that will actually help.
Quiet streets, filled walls
Childwall developed largely in the 1930s and the decades after the war, and its tree-lined roads around Childwall Valley Road and Score Lane are dominated by semis and detached homes. Most have cavity walls, and in our experience a large share of them were insulated at some point, often with blown mineral wool.
Childwall sits on a ridge with some height above the rest of south Liverpool. Most of the area is sheltered by surrounding houses and trees, but a minority of homes with open aspects to the west catch more weather than their neighbours.
Three questions we ask Childwall homeowners
When did the insulation go in, and by whom?
The date helps us guess what material is in the wall and whether a guarantee may apply. If you have paperwork, keep it handy. CIGA can tell you if the installation is registered.
Which walls show the problem?
Damp limited to one or two outside walls, especially facing west or south-west, points towards the cavity. Damp everywhere, including internal walls, points elsewhere.
Has anything changed on the outside?
A new extension, a conservatory, raised paths or patios, or a gutter that started overflowing can all push water into a previously dry filled cavity. We see this often in suburban homes that have been extended over the years.
Extensions and conservatories
Childwall has plenty of homes that have grown over time. The junction where an extension meets the original wall, or where a conservatory roof sits against brickwork, is a common weak point. If water runs into the cavity at that junction and meets wet fill, damp can appear some distance away inside. We pay particular attention to these junctions during an inspection, and sometimes the right answer is a repair at the junction, not a full extraction.
How the work is done
After a borescope cavity inspection confirms the problem, we give a written quote. Removal involves taking bricks out at intervals along the wall, extracting the fill with industrial vacuum equipment, using compressed air and rods to free stubborn sections, and clearing rubble from the bottom. A second borescope check from several positions confirms the cavity is clear. Bricks go back in and pointing is matched as closely as practical, followed by a written report with photos. The cavity wall extraction page explains each stage further.
Removal is not a cure for condensation. If the readings and pattern point to condensation, we will tell you, and suggest looking at ventilation and heating rather than taking out the insulation.
After extraction
The walls need time to dry. Once they have, and any defects such as pointing or extension junctions are fixed, a sheltered Childwall house is often a reasonable candidate for refilling with a suitable product. See damp after cavity insulation for how we judge whether the wall has recovered.
Neighbouring areas include Woolton, West Derby and Allerton. For our wider cavity wall insulation removal specialists in Liverpool, or more on extracting failed cavity insulation, visit our home page.
Damp patches in a Childwall home?
Call 07777 659786 and let us know when the cavity was filled and which walls are affected. We will ring you back and arrange a visit if it is needed.
Frequently asked questions
Could my Childwall extension be causing damp in the original wall?
It can. Water can run into the cavity where an extension or conservatory meets the original house, especially if the flashing or cavity tray at the junction is poor. In a filled cavity, that water can travel to the inner wall. We inspect junctions closely before deciding whether extraction is needed.
How do I find out what insulation was used in my Childwall house?
Any paperwork from the installer or CIGA may say. If not, a borescope inspection through a small hole in the mortar shows the material directly, whether mineral wool, beads or foam, along with its condition.
Do you cover Belle Vale and Netherley as well?
Yes. We cover Belle Vale, Netherley, Gateacre and the rest of the L16 and L25 areas alongside Childwall.
Will you tell me if my damp is condensation rather than the cavity?
Yes. Our inspection is about finding the cause. If moisture readings and the pattern of damp point to condensation, we will explain that and suggest ventilation or heating changes, rather than recommending an extraction that would not help.