Room-in-roof insulation in Clapham
We fit room-in-roof insulation for homes in Clapham and across Greater London, starting with a free survey and a fixed written quote.
We cover the SW4, SW8 and SW11 postcode districts.

Where we work around Clapham
As the crow flies, Clapham is roughly 3 miles from central London.
We work in neighbouring Battersea, Brixton, Chelsea and Streatham too.
| Postcode districts | SW4, SW8, SW11, SW2 |
|---|---|
| County or area | Greater London |
What is room-in-roof insulation?
Most rooms-in-roof are reached by stripping the existing plasterboard on the slopes, fitting insulation between and over the rafters, and re-boarding. Where there is access behind the knee walls, we insulate the eaves voids and the floor behind them too. More about room-in-roof insulation.
- Insulation to slopes, knee walls and flat ceiling
- Boarding and finishing as agreed on the quote
- Eaves voids insulated where accessible
Why book with us in Clapham
Fixed written price
The price on the quote is the price you pay. It only changes if you change the job, or if we find something hidden, such as rot, and you agree the change in writing first.
Photos of the finished loft
You see the work done without climbing the ladder.
No pressure selling
You get everything in writing and decide in your own time.
Clear contact details
Your quote says who to call with questions before, during and after the work.
How much does room-in-roof insulation cost in Clapham?
Part of this work can be zero-rated as energy-saving materials until 31 March 2027, and part is standard-rated. If VAT applies, your quote shows which is which.
Building regulations in England
In England, a loft insulated across more than half its area should reach a U-value of 0.16 W/m²K. Insulation alone is not usually notified to building control. How the rules work across the UK.
Questions about room-in-roof insulation in Clapham
How soon can you visit a home in Clapham?
We call you back to agree a time that suits you, and confirm the date in writing. Availability changes week to week, so we will give you the earliest slot we have.
How do I pay for work in Clapham?
Payment terms are set out on your quote. We never ask for payment on the doorstep or in cash.
Do you charge extra to travel to Clapham?
Not normally. Our guide prices include normal travel to Clapham. If an address needs a ferry or an unusually long journey, we tell you the cost before you book.
How long does room-in-roof insulation take?
Usually three to six working days for one room, depending on how much is stripped and how it is finished.
Will the room get smaller?
Slightly. Insulated plasterboard over the rafters takes a few centimetres off each slope.
