Loft InsulationInstallers

Rafter insulation in Portsmouth

If you need rafter insulation in Portsmouth, we can help, and it starts with a free survey and a fixed written quote.

Postcode districts we cover here include PO1, PO5 and PO2, which fall under Portsmouth council.

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

Where we work around Portsmouth

Portsmouth sits about 15 miles from Southampton, measured in a straight line.

We also cover Gosport, Fareham, Hayling Island and Havant.

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

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. It earns its place when you need a warm loft. More about rafter insulation.

  • Build-up designed for your type of roof underlay
  • Vapour control layer where the design needs one
  • Insulated plasterboard lining where specified

Why book with us in Portsmouth

No pressure selling

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

Plain-English advice

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

Photos of the finished loft

You see the work done without climbing the ladder.

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.

How much does rafter insulation cost in Portsmouth?

£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 Portsmouth

Can a landlord in Portsmouth book work for a tenanted house?

Yes. We can arrange access with the tenant directly and send you photos once the work is finished.

Can you visit Portsmouth outside working hours?

Ask about early, late or weekend appointments when you get in touch, and we will tell you honestly what we can offer.

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 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 Portsmouth

Find out what your loft needs

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