Cost guide
How much does a Cavity Wall Insulation cost?
Thinking about making your home warmer and saving on energy bills? Cavity wall insulation is a popular choice for many UK homeowners. It involves filling the gap between your external and internal walls with insulating material, stopping heat from escaping. This guide will help you understand the typical costs involved. You'll also learn what affects the price and why getting a few quotes is always a good idea to find the best value for your home.
Typical price
£500 to £1,500
What changes the price
House size
Larger homes with more wall space to insulate will naturally cost more.
Wall accessibility
Difficult to reach walls or complex property layouts can increase labour time and cost.
Material type
Different insulating materials, like mineral wool or polystyrene beads, have varying costs.
Pre-inspection needs
If existing insulation needs removing or walls need repairing first, this adds to the price.
Installer experience
Highly experienced and certified installers might charge a little more for their expertise.
Regional pricing
Costs for services and labour can vary quite a bit depending on where you live in the UK.
Prices by region
| Region | Low | Typical | High |
|---|---|---|---|
| London | £700 | £1,200 | £1,800 |
| South East | £650 | £1,100 | £1,700 |
| South West | £550 | £950 | £1,400 |
| East of England | £600 | £1,050 | £1,600 |
| Midlands | £500 | £900 | £1,350 |
| North West | £500 | £850 | £1,300 |
| North East and Yorkshire | £450 | £800 | £1,250 |
| Scotland and Wales | £500 | £850 | £1,300 |
Questions people ask
What happens during installation?
Small holes are drilled into your external walls, and insulation material is blown into the cavity. The holes are then filled and made good, leaving a neat finish.
How long does it take?
Most cavity wall insulation jobs can be completed within a single day. Larger or more complex properties might take a little longer.
Will it save me money?
Yes, it can significantly reduce your heating bills by preventing heat loss through your walls. It also makes your home feel much warmer and more comfortable.
Do I need planning permission?
Generally, you do not need planning permission for cavity wall insulation. However, it's always wise to check with your local council if your home is listed or in a conservation area.
Is my home suitable?
Most homes built between 1920 and 1990 have suitable cavity walls. A professional surveyor will assess your home's suitability before any work begins.
What if my walls have damp?
Existing damp issues must be resolved before insulation is installed. Insulating damp walls can worsen the problem and lead to bigger issues down the line.