Cost guide
How much does a Loft & roof insulation cost?
Thinking about topping up your loft insulation? It's a smart move for your home's warmth and your wallet. You're looking at typical costs between £100 and £350 to bring your current loft insulation up to the recommended 270 mm. This helps you keep heat in your home, making it cosier and potentially lowering your energy bills.
Typical price
£100 to £350
What changes the price
Current insulation depth
If you have very little insulation now, more material will be needed, which can affect the price.
Loft access ease
Easy access means less time and effort for the installers, often reducing the cost.
Loft size
A larger loft area naturally requires more insulation material and more time to install.
Insulation material choice
While most opt for mineral wool, some specialised materials might have different costs.
Joist height
If your joists are too shallow, insulation stilts might be needed to reach the 270 mm depth.
Removal of old insulation
If old insulation needs to be taken out before new material goes in, this will add to the overall cost.
Prices by region
| Region | Low | Typical | High |
|---|---|---|---|
| London | £120 | £270 | £350 |
| South East | £110 | £250 | £330 |
| South West | £105 | £230 | £310 |
| East of England | £100 | £220 | £300 |
| Midlands | £100 | £210 | £290 |
| North West | £95 | £200 | £280 |
| North East and Yorkshire | £90 | £190 | £270 |
| Scotland and Wales | £90 | £190 | £270 |
Questions people ask
Why should I top up my loft insulation?
Topping up your loft insulation helps your home retain heat much more effectively. This means a warmer house in winter and potentially lower energy bills throughout the year.
How long does the installation take?
For topping up existing insulation, most jobs can be completed quite quickly. It often takes just a few hours for a professional team to finish the work.
Do I need to clear my loft first?
Yes, it is very helpful to clear your loft of any belongings before the installers arrive. This ensures they have clear access and can work efficiently and safely.
Can I do this myself?
While it is possible to DIY, professional installers ensure the insulation is laid correctly and safely. This guarantees optimal performance and avoids common mistakes.
What is the recommended depth?
The current recommended depth for loft insulation in the UK is 270 mm. This thickness provides excellent thermal resistance for most homes.
Will it make my home much warmer?
Absolutely, properly topped up loft insulation makes a big difference to your home's warmth. You should notice a more consistent temperature and fewer draughts.