Warmer walls, lower bills. Up to 35% of your home's heat escapes through uninsulated walls. Our quick injection process fills the cavity and keeps the warmth inside.
Most homes built between the 1920s and 1990s have cavity walls - two layers of brick with a gap (cavity) between them. While this design helps prevent damp, the empty cavity allows heat to escape.
Cavity wall insulation fills this gap with an insulating material, dramatically reducing heat loss and making your home warmer and more energy-efficient.
Typical savings on heating bills for a semi-detached house.
Most homes completed in just 2-3 hours with minimal disruption.
Full guarantee on materials and workmanship for peace of mind.
The installation process is straightforward and causes minimal disruption to your daily life.
We use a camera to check your cavity is suitable and free from obstructions.
Small 22mm holes are drilled into the mortar joints at intervals around the property.
Mineral wool or bead insulation is pumped into the cavity under pressure.
Holes are filled with colour-matched mortar, leaving virtually no trace.
Here's how to tell if your property is suitable for cavity wall insulation.
Most homes built between 1920 and 1990 have cavity walls. Properties built before 1920 typically have solid walls, while those after 1990 often already have insulation.
Cavity walls show bricks laid lengthways in a uniform pattern. Solid walls often show a mix of headers (short ends) and stretchers (long sides).
Measure at a door or window opening. Cavity walls are typically 250-300mm thick. Solid walls are usually around 225mm or less.
Not sure? Don't worry - our free survey will confirm whether your property is suitable.
Cavity wall insulation isn't suitable for every property. Our survey checks for these factors to ensure it's the right solution for your home.
Properties in exposed locations with driving rain
Walls with existing damp or structural issues
Cavities less than 50mm wide
Damaged or deteriorating mortar joints
If cavity wall insulation isn't suitable, we may be able to offer alternative solutions or refer you to our cavity extraction service if you have problematic existing insulation.
The holes are drilled into mortar joints and filled with colour-matched mortar after installation. While you may notice them initially, they blend in over time and become virtually invisible within a few months as the mortar weathers.
When installed correctly in a suitable property, cavity wall insulation should not cause damp. Problems can occur if installed in unsuitable properties (high exposure to driving rain, existing damp issues, or narrow cavities). Our thorough survey process identifies any risks before installation.
We primarily use mineral wool or polystyrene bead insulation, both of which are BBA certified and proven to perform well in UK conditions. The choice depends on your property's specific requirements, which our surveyor will assess.
Yes, someone over 18 needs to be present during installation. However, the work is carried out externally, so disruption inside your home is minimal. Most installations are completed within 2-3 hours.
If you're experiencing damp, cold spots, or other issues after cavity wall insulation was installed, you may need our cavity wall extraction service. This involves safely removing the existing insulation to resolve the problem.
Check your eligibility for free government-funded cavity wall insulation.
