Loft InsulationInstallers

Rafter insulation in Sidcup

Homes in Sidcup get the same service as everywhere else we work in Greater London. For rafter insulation, that means a free survey and a fixed written quote.

We cover the DA14, DA15 and BR7 postcode districts, which fall under Bexley council.

Guide price £1,645 to £2,595 Sidcup, Greater London
Insulation boards fitted between roof rafters

Where we work around Sidcup

As the crow flies, Sidcup is roughly 11 miles from central London.

We also cover Welling, Eltham, Bexleyheath and Orpington.

Postcode districtsDA14, DA15, BR7, DA5
Council areaBexley
County or areaGreater London

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
  • Insulated plasterboard lining where specified
  • Rigid insulation between the rafters, joints taped

Why book with us in Sidcup

Photos of the finished loft

You see the work done without climbing the ladder.

Tidy work

Dust sheets on the route in and every bit of packaging taken away.

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.

How much does rafter insulation cost in Sidcup?

£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 Sidcup

Do you cover all of DA14?

Yes, we cover the DA14 postcode district and the districts around Sidcup.

Do you take on jobs outside Sidcup?

Yes. We also work in Welling and Eltham and elsewhere in Greater London.

Is loft work in Sidcup different from anywhere else?

The method is the same, but older terraces, cottages and newer estates each have their own quirks: lath ceilings, low pitches or trussed roofs. We plan for the loft we find.

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.

Is insulating between the rafters better than the loft floor?

Not for saving energy alone. Insulating the floor heats less space and costs far less. Rafter insulation is the right answer when the loft itself needs to be warm.

Rafter insulation in other towns

Other loft work in Sidcup

Find out what your loft needs

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