Cavity wall extractionSouthsea, Portsmouth (PO5)

Coastal terrace, Southsea: 130m² fibre extraction

A tall Southsea property with 130m² of fibre-filled cavity wall and rubble in the cavity. Exposed coastal homes are some of the worst affected by wet cavity insulation — driving rain soaks the outer leaf and the fibre carries the water across to the inner wall.

  • 130m² of fibre insulation extracted
  • Full rubble clearance
  • Cavity refilled
  • Single-skin gable identified and excluded
  • Brickwork repairs flagged to customer
Coastal terrace, Southsea: 130m² fibre extraction

What we did

We extracted the fibre insulation, cleared the rubble, and refilled the cavity. The very top of the gable was single-skin brickwork, so that section could not be filled. We noted the damaged bricks and repointing the customer's builder would need to sort out, and suggested timing their scaffold with ours — ladder access on a tall coastal terrace would have been extremely awkward.

Why it matters

We tell customers about the problems we find, not only the work we are selling. In this case that meant pointing out brickwork repairs that another trade would carry out. The customer left with a clear picture of everything their house needed, not just the cavity.

Live near the coast and worried about damp walls?

Coastal homes are particularly vulnerable to wet cavity insulation. We survey with a borescope and tell you exactly what is in your walls.

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.