Save up to £280 a year on energy bills(1) with cavity wall insulation that stops 33% of heat from escaping.
from £950 professionally installed
Waste 33% less heat and save £280 a year on energy bills(1)
Cavity wall insulation is one of the best and most affordable things you can do to improve your home's energy efficiency.
For a typical home, cavity wall insulation starts from £950.
What is cavity wall insulation?
Houses in the UK mostly have either cavity walls or solid walls:
- Cavity walls are made of two layers with a gap or ‘cavity’ between them. If your home was built after the 1920s, it's likely to have cavity wall.
- Solid walls have no gap, so they can’t be filled with cavity wall insulation. If your home was built before the 1920s, it's likely the external walls are solid walls rather than cavity walls
Cavity walls can be insulated by injecting insulation into the cavity from the outside through drill holes in the outside walls.
Insulation is usually mineral wool or polystyrene beads or polyurethane foam.
How can I tell if I have a cavity wall?
There are some common ways to tell if your property has a cavity wall:
- It was built after 1920; homes built within the last 40 years almost certainly do
- It has walls more than 260mm thick
- It has brickwork like below
Why is cavity wall insulation a good idea?
Insulating the cavity space between the outside and inside wall adds a barrier to stop the cold from coming in and heat from escaping.
What our customers say
I have noticed a huge difference in the warmth of my home. Before I was having the heating on not just high during the day but also I had to keep it on through the evening during very cold winter nights. This was extremely expensive.
How can I fund my cavity wall insulation?
ECO scheme
The long-running Energy Company Obligation (ECO) scheme helps people on certain benefits to cut their energy costs through home improvements. It's worth checking if you're eligible.
There's other insulation to consider
Loft insulation
from £800 professionally installed
Around 25% of your heating can be lost into through your roof - save up to £250 a year on energy bills(2)
Solid wall insulation
from £7,400 professionally installed
Save as much as £375 a year on heating bills(3) and transform the look of your home.
Insulation and energy-saving advice
A Complete Guide to Floor Insulation
Cold doesn't just come in through walls, doors and windows, it can come up through the floor too. Insulation can prevent this, make the floor more comfortable to walk on and prevent mould.
Conservatory Insulation: Use it All Year Round
Conservatories are often considered a room used in summer but with proper insulation, it could be used all year round.
How insulation works
Get into the details of how insulation can save you money, energy and CO2 emissions, and what different types of insulation there are out there and the materials used.