Room-in-roof insulation in Streatham
Looking for room-in-roof insulation in Streatham? We cover Streatham and the rest of Greater London, with a free survey and a fixed written quote.
We cover postcodes including SW16, SW12 and SE27. The local authority is Lambeth.

Where we work around Streatham
Streatham sits about 5 miles from central London, measured in a straight line.
Nearby, we also cover Clapham, Mitcham, Brixton and Wimbledon.
| Postcode districts | SW16, SW12, SE27, SW17 |
|---|---|
| Council area | Lambeth |
| 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.
- Boarding and finishing as agreed on the quote
- Insulation to slopes, knee walls and flat ceiling
- Eaves voids insulated where accessible
Why book with us in Streatham
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.
Plain-English advice
We explain what we find in plain English, and say so when nothing needs doing.
We measure before we quote
Existing depth, joist spacing, wiring and the tank are checked, not guessed.
No pressure selling
You get everything in writing and decide in your own time.
How much does room-in-roof insulation cost in Streatham?
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 Streatham
Do you charge extra to travel to Streatham?
Not normally. Our guide prices include normal travel to Streatham. If an address needs a ferry or an unusually long journey, we tell you the cost before you book.
Do you take on jobs outside Streatham?
Yes. We also work in Clapham and Mitcham and elsewhere in Greater London.
Do you cover all of SW16?
Yes, we cover the SW16 postcode district and the districts around Streatham.
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.
Can it be done without removing the plasterboard?
Sometimes the flat ceiling and eaves voids can be reached from behind. The slopes almost always need the boards off to insulate them properly.
