Loft InsulationInstallers

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.

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

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 districtsSW4, SW8, SW11, SW2
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.

  • 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?

£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 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.

Room-in-roof insulation in other towns

Other loft work in Clapham

Find out what your loft needs

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