Loft InsulationInstallers

Rafter insulation in Dorset

For rafter insulation anywhere in Dorset, you get a free survey and a fixed written quote.

We work in Bournemouth, Poole, Weymouth, Christchurch and Ferndown and everywhere in between.

Guide price £1,645 to £2,595 Dorset
Insulation boards fitted between roof rafters

Where we work around Dorset

Council areas covered: Dorset and Bournemouth, Christchurch and Poole.

That covers the BH, DT and SP postcode areas.

CouncilsDorset and Bournemouth, Christchurch and Poole
Postcode areasBH, DT, SP
Towns listed9

What is rafter insulation?

Because the whole roof slope, the gables and the party walls now have to be insulated, this costs much more than insulating the floor and saves less heat for the money. We check the roof underlay first: a breathable membrane and a felt with no ventilation gap need different build-ups to avoid condensation. More about rafter insulation.

  • Vapour control layer where the design needs one
  • Rigid insulation between the rafters, joints taped
  • Build-up designed for your type of roof underlay

Why book with us in Dorset

No pressure selling

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

We measure before we quote

Existing depth, joist spacing, wiring and the tank are checked, not guessed.

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.

How much does rafter insulation cost in Dorset?

£1,645 to £2,595About 30 m² of roof slope. 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 rafter insulation in Dorset

Can you quote for several properties in Dorset?

Yes. Landlords and agents can send a list of addresses and we will survey them in as few visits as we can.

Do you cover the whole of Dorset?

Yes. We cover every town and village in Dorset, including Bournemouth, Poole and Weymouth.

Can I use the loft as a bedroom after rafter insulation?

Insulation alone does not make a loft habitable. Fire escape, stairs, floor strength and headroom all come into a conversion, which needs building control.

Will it cause condensation?

It can if the build-up is wrong for the roof. Old bitumen felt needs a ventilation gap behind the insulation; a modern breathable membrane may not. We check before we design it.

Rafter insulation in other towns

Other loft work in Dorset

Find out what your loft needs

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