Cavity wall insulation

Cavity walls

The external walls of a house are actually made of two walls, an inner wall and an outer wall, with a gap of at least 50mm between them. The cavity was originally designed to stop homes getting damp. If your home was built from 1920 onwards, it's very likely that the external walls are made of two layers with a small gap or 'cavity' between them, hence the name Cavity Wall.

Why cavity wall insulation

Cavity wall insulation means filling that cavity or gap, there are very good reasons for this type of insulation.

Cavity wall insulation grants

The cost of cavity wall insulation can be subsidised by government grants and is an effective way to save energy and money at home by keeping insulation prices down. This process will keep your house warm and save you money also to heat your home more efficiently. Using less energy reduces carbon dioxide emissions (CO2): reducing your carbon footprint.

Cavity wall insulation installation

Cavity wall insulation is quick, clean and free or inexpensive to install. It is blown into the cavity from the outside, typically taking two or three hours. All cavity wall installations are backed by a 25 year independent guarantee from CIGA, the Cavity Insulation Guarantee Agency.

Additional benefits of cavity wall insulation

Cavity walls and insulation can also help to reduce condensation inside the house if it is a problem on external walls.

How cavity wall insulation works

Cold air moves to replace hot air, due to its density, cold air will displace the warm air in your home if your walls and or loft are insulated.

Cavity wall insulation slows down the rate at which heat escapes, keeping as much of it as possible inside your home. Insulation makes it much more difficult for heat to pass through your walls by filling up the cavity with a suitable material. U value is the rate at which heat escapes from a building, which normal is around 1.5 to 0.5 W/m2K. The lower the U value, the slower heat is lost meaning a saving on energy, not requiring constant heating to keeping the home warm.

FREE cavity wall insulation survey and consultation

Our highly trained surveyors can visit your home in the counties of Kent, East Sussex, Surrey, London and most of the South East. Please fill out our insulation quote form to arrange a visit.