PO12 & PO13

Insulation, solar and EV charging in Gosport

Gosport is home. Our yard is at Clarence Wharf on Mumby Road, and we have been working in and around the peninsula's houses since 2013.

Extract Energy cavity wall insulation work in Gosport

Gosport's housing and what goes wrong with it

Gosport grew fast after the war. The big estates at Rowner, Bridgemary and Brockhurst went up between the 1950s and 1970s, mostly cavity-walled semis and terraces with 50mm to 65mm cavities. Alverstoke and Anglesey have older, grander stock, some of it solid-walled Victorian. Lee-on-the-Solent and Elson have a mix of 1930s semis and later infill. Privett and Hardway are largely 1960s to 80s.

Two things make Gosport a hard place for cavity wall insulation. First, exposure: the peninsula sticks out into the Solent, and the prevailing south-westerlies drive rain horizontally into walls on Stokes Bay, Haslar and the Alverstoke seafront. Second, timing: houses like these were filled in large numbers under the schemes of the late 2000s and 2010s, and where that fibre has failed it is now 15 years old or more. Mould in the top corners of an upstairs bedroom is the classic symptom.

Loft-wise, many Gosport semis still have the original 50mm to 100mm, flattened under decades of boarding. And the flat-roofed sections on some 1960s houses rule out loft work on that part, which we will point out honestly.

What Gosport homes typically need

  • Cavity wall insulation removal. Wet fibre on exposed elevations in Rowner, Bridgemary and Alverstoke. Usually a one-day job from our yard ten minutes away.
  • Bonded bead re-insulation once the cavity has dried, for houses where the wall is sound.
  • Loft top-ups and raised boarding across the 1950s to 70s estates.
  • Solar and battery. Plenty of south-facing roofs on the post-war estates and a growing number of EV owners in Lee-on-the-Solent and Alverstoke.

Typical Gosport houses and what we usually look for

This is general local knowledge about the houses, not a list of finished jobs.

1950s to 70s semis and terraces in Rowner, Bridgemary and Brockhurst

Cavity walls, often filled in the 2000s. We check the south-west gables for wet fill and the upstairs corners for mould.

1930s semis in Elson and Lee-on-the-Solent

Lofts that are often still at the original 100mm or less, and sometimes boarded straight onto the joists.

Post-war estate roofs

Plenty of simple, south-facing roofs that suit solar.

Grants in Gosport

Gosport Borough Council is part of the Portsmouth-led consortium that runs the Warm Homes: Local Grant locally as Warmer Homes, operated by Agility Eco. It is currently oversubscribed, with a waiting list. 339 Gosport postcodes are on the government's eligible list, concentrated in PO12 1, PO13 8, PO12 4 and PO12 3. We have applied to join the Warmer Homes installer network and are not confirmed on it yet, so we cannot promise to be the installer who turns up.

Warm Homes: Local Grant guide

Now open

Warm Homes Loan — solar and battery finance

The Warm Homes Loan Scheme opened on 27 October 2026. It gives homeowners a lower-interest loan — up to £15,000 for solar panels and a further £15,000 for battery storage. No means test. We provide the written MCS quote a lender needs; you apply to a participating lender and we install once funding is confirmed.

Get a lender-ready quote

Gosport FAQs

How do I book a survey in Gosport?

Call 0800 7022181 or book online and we will arrange a time that suits you. The survey is free.

Which Gosport estates have cavity walls?

Rowner, Bridgemary, Brockhurst, Privett, Hardway, Elson and most of Lee-on-the-Solent are cavity-walled. Older parts of Alverstoke and the High Street area are often solid. We check at the survey.

Book a free survey in Gosport

Extract Energy

Insulation, solar, battery storage and EV charging for homes across Hampshire, Wiltshire, the Isle of Wight, West Sussex and Surrey. Based in Gosport since 2013.

0800 7022181 sales@extractenergy.co.ukUnit 9 Clarence Wharf, Mumby Road, Gosport PO12 1AJMon–Fri 9am–5pm

Company

Accreditations

SchemeReference
TrustMark1948305
MCS (IAA)IAA10310
IAA installerFED10392
Kiwa579075
NAPITRegistered
ConstructionlineGold member
EA waste carrierCBDU532168

Extract Energy is a trading name of Extract Insulation Ltd, registered in England & Wales no. 09462745. Registered office: Unit 9 Clarence Wharf, Mumby Road, Gosport PO12 1AJ. VAT registration no. 213906329. Environment Agency registered waste carrier CBDU532168. TrustMark licence 1948305. MCS certificate IAA10310. NAPIT registered. © Extract Insulation Ltd 2026.

All installations are carried out by qualified, accredited engineers. Solar PV, battery storage and EV charger installations are subject to survey and technical assessment. Insulation measures are subject to property suitability checks. Prices and eligibility criteria are subject to change. VAT at 0% applies to the installation of qualifying energy-saving materials (insulation, solar panels and battery storage) until 31 March 2027, after which the rate reverts to 5%. Removal works, loft boarding and EV charger installation are subject to VAT at 20%. Nothing on this website constitutes financial advice. The Warm Homes Plan (grant and loan routes) is a government scheme; eligibility is determined by the relevant scheme administrator and is not guaranteed. Registering your interest does not constitute an application or a commitment by Extract Energy or the scheme administrator.

Extract Energy is not a financial services firm and does not provide regulated financial advice. Warm Homes Loan products are government-backed; independent financial advice is recommended before entering any credit agreement.