Loft insulation top-up in Portsmouth

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 districts	PO1, PO5, PO2, PO4
Council area	Portsmouth
County or area	Hampshire

What is a loft insulation top-up?

Before we quote we measure the existing layer in several places and check its condition. If it is dry, even and not contaminated, we keep it and lay the top-up across it at right angles. More about a loft insulation top-up.

Gaps in the existing layer filled
Depth check and photos before and after
Eaves ventilation kept clear

Why book with us in Portsmouth

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.

Clear contact details

Your quote says who to call with questions before, during and after the work.

Tank and pipes protected

Every insulation job includes a tank jacket and pipe lagging, so nothing freezes in a colder loft.

No pressure selling

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

How much does a loft insulation top-up cost in Portsmouth?

£395 to £545Terraced house, average loft, topping up from about 100 mm. Free survey and a fixed written quote before any work.

Installing insulation in a home is zero-rated for VAT until 31 March 2027 and 5% after that, under HMRC's rules for energy-saving materials (notice 708/6).

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 a loft insulation top-up in Portsmouth

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.

How do I pay for work in Portsmouth?

Payment terms are set out on your quote. We never ask for payment on the doorstep or in cash.

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.

Can I still store things in the loft after a top-up?

Not directly on the insulation. A 270 mm layer stands well above the joists, so storage needs raised boarding on loft legs.

Is it worth topping up 100 mm of loft insulation?

Often, if the existing layer is in good condition and you also want a warmer house or a better EPC. On bill savings alone, a top-up from about 100 mm takes decades to pay back, so the case is strongest when it is done alongside other loft work.