Loft InsulationInstallers

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.

Guide price £3,995 to £8,995 Streatham, Greater London
An attic room being insulated

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 districtsSW16, SW12, SE27, SW17
Council areaLambeth
County or areaGreater 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?

£3,995 to £8,995One room-in-roof, depending on size and finish. Free survey and a fixed written quote before any work.

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.

Work out a guide price for your loft

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.

Room-in-roof insulation in other towns

Other loft work in Streatham

Find out what your loft needs

Free survey and a fixed written quote for installation work. Guide prices first if you prefer.