Loft InsulationInstallers

Room-in-roof insulation in Portsmouth

Portsmouth is part of the area we cover in Hampshire. For room-in-roof insulation, you get a free survey and a fixed written quote.

We cover postcodes including PO1, PO5 and PO2. The local authority is Portsmouth.

Guide price £3,995 to £8,995 Portsmouth, Hampshire
An attic room being insulated

Where we work around Portsmouth

Portsmouth is about 15 miles from Southampton as the crow flies.

Nearby, we also cover Gosport, Fareham, Hayling Island and Havant.

Postcode districtsPO1, PO5, PO2, PO4
Council areaPortsmouth
County or areaHampshire

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. The room will need redecorating. More about room-in-roof insulation.

  • Eaves voids insulated where accessible
  • Insulation to slopes, knee walls and flat ceiling
  • Boarding and finishing as agreed on the quote

Why book with us in Portsmouth

No pressure selling

You get everything in writing and decide in your own time.

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.

Plain-English advice

We explain what we find in plain English, and say so when nothing needs doing.

How much does room-in-roof insulation cost in Portsmouth?

£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 Portsmouth

How soon can you visit a home in Portsmouth?

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.

Do you charge extra to travel to Portsmouth?

Not normally. Our guide prices include normal travel to Portsmouth. If an address needs a ferry or an unusually long journey, we tell you the cost before you book.

What do I need to do before you arrive in Portsmouth?

Clear a path to the hatch and, if you can, move stored items away from the area we will be working in. Tell us about anything heavy or fragile.

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.

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.

Room-in-roof insulation in other towns

Other loft work in Portsmouth

Find out what your loft needs

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