Real jobs, real photos

Case studies: real jobs, real photos

We photograph every job we do. We write them up here, with the homeowner's or client's permission and without their address, so you can see what the work involves. From single homes to programmes of 13 properties at once.

Loft cleared of abandoned spray foam debris and re-insulated by Extract Energy
Spray foam removalHampshire

Spray foam removal left unfinished by another company — we cleared it and re-insulated

A homeowner paid another company to remove spray foam. They left the job incomplete and abandoned debris in the loft. We cleared it fully and re-insulated to 270mm.

  • Full debris removal & loft clean
  • Re-insulated to 270mm
  • TrustMark registered work
  • Mortgage-ready outcome
Read the full case study
Solar panels installed on semi-detached house in Fareham by Extract Energy
Solar & BatteryFareham, Hampshire

In-roof Solar PV + Sigenergy 37kWh Battery — Fareham

Large in-roof solar installation with a Sigenergy battery system on a 1970s semi-detached. The customer now generates the majority of their electricity and exports surplus via the Smart Export Guarantee.

  • 28-panel in-roof system
  • Sigenergy SigenStor (37kWh)
  • MCS certified
  • SEG registered
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Cavity wall insulation inspection in Gosport by Extract Energy
Cavity wall insulationGosport, Hampshire

Cavity wall extraction & ThermaBead replacement — Gosport

Failed 1990s polystyrene bead insulation extracted using our own Extract Vac machines, walls dried and inspected, then fully re-insulated with ThermaBead EPS bead. The customer reported a significant improvement in warmth within days.

  • Full extraction with Extract Vac
  • ThermaBead EPS bead system
  • TrustMark registered
  • Walls inspected & dried before reinstatement
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Smart EV charger installed in Southampton home by Extract Energy
EV charger installationSouthampton, Hampshire

7kW OZEV EV charger with solar integration — Southampton

OZEV-approved 7kW smart home EV charger installed alongside an existing solar PV system. The smart charger automatically diverts surplus solar generation to charge the vehicle, reducing charging costs to near zero on sunny days.

  • 7kW smart charger
  • OZEV approved installation
  • Solar divert integration
  • App-controlled scheduling
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Loft boarding and insulation installation in Waterlooville by Extract Energy
Loft insulation & boardingWaterlooville, Hampshire

Loft insulation to 270mm + raised boarding — Waterlooville

Loft insulation upgraded from an inadequate 50mm to the full recommended 270mm depth, with raised loft boarding installed above the insulation to preserve the family's storage space. A new loft ladder and light were fitted at the same time.

  • 270mm mineral wool insulation
  • Raised loft boarding system
  • New loft ladder fitted
  • Storage space fully preserved
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Solar panels on terraced house rooftop in Portsmouth installed by Extract Energy
Solar & BatteryPortsmouth, Hampshire

4kW Solar PV + GivEnergy battery — Portsmouth

4kW solar installation on a terraced property with a GivEnergy 9.5kWh battery. Sized to maximise self-consumption for a household with high evening usage. Installation completed in a single day with no disruption to neighbours.

  • 4kW, 10-panel system
  • GivEnergy 9.5kWh battery
  • Single-day installation
  • EPC rating improved from D to B
Read the full case study
Cavity wall insulation installation at new build in Hedge End by Extract Energy
Cavity wall insulationHedge End, Hampshire

Cavity wall insulation — new build upgrade, Hedge End

ThermaBead EPS bead insulation installed in a 2005 detached property that had never been insulated. Post-installation thermal imaging confirmed full cavity coverage with no cold bridges.

  • ThermaBead EPS bead system
  • Thermal imaging survey
  • Full cavity coverage confirmed
  • Heating bills reduced by ~30%
Read the full case study
Loft insulation removal and reinstallation in Eastleigh by Extract Energy
Loft insulation removalEastleigh, Hampshire

Loft insulation removal & upgrade — Eastleigh

Old compressed fibreglass insulation removed and disposed of responsibly, loft space cleaned and inspected, then re-insulated with 270mm modern mineral wool. The old material had settled to just 30mm — the customer had cold upstairs rooms despite thinking they had insulation.

  • Full removal & responsible disposal
  • Loft inspection & clean
  • 270mm mineral wool reinstated
  • Upstairs temperature noticeably improved
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Solar panels and battery storage installed in Havant by Extract Energy
Solar & BatteryHavant, Hampshire

4kW Solar PV + Growatt battery — Havant

Solar PV and Growatt SPH 5000 battery installed for a retired couple looking to reduce fixed-income energy costs. Funded under the Warm Homes Plan. The couple now generate and store enough electricity to cover most of their daily usage.

  • 4kW solar array
  • Growatt SPH 5000 battery
  • Fully funded installation
  • Significant bill reduction for retired household
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Dual EV charger installation in Chichester double garage by Extract Energy
EV charger installationChichester, West Sussex

Dual EV charger installation — Chichester

Two 7kW OZEV-approved smart chargers installed in a double garage for a household with two electric vehicles. Load balancing configured so both cars can charge simultaneously without tripping the main supply.

  • 2 × 7kW smart chargers
  • Load balancing configured
  • OZEV approved
  • Full electrical safety certificate
Read the full case study
Cavity wall inspection at Gosport whole-house retrofit by Extract Energy
Whole-house retrofitGosport, Hampshire

Whole-house retrofit, Gosport: EPC E to A

Cavity wall extraction and ThermaBead refill, solar PV, battery storage and heat pump on a Gosport home. The EPC rating went from E to a high A — one of the biggest jumps a home can make.

  • EPC E to high A
  • Cavity wall extraction and ThermaBead refill
  • Solar PV and battery storage
  • Heat pump installation
Read the full case study
Cavity wall insulation extraction on a block of flats by Extract Energy
Cavity wall extractionReading (RG2)

Eight flats, Reading: fibre extraction and refill

Failed fibre insulation extracted from a block of eight flats. 318m² of wall area surveyed with a borescope, rubble cleared, cavities refilled. Worked alongside the main contractor and met the council surveyor on site.

  • 318m² of wall area treated
  • Eight flats in one programme
  • Borescope survey of every elevation
  • Council surveyor liaison
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Cavity wall and brickwork repair on council homes in Crawley by Extract Energy
Cavity wall and loft programmeCrawley (RH11)

Council homes, Crawley: walls, brickwork and loft in one programme

Failed fibre extracted, around 150 spalled bricks replaced, Stormdry applied, and loft upgraded to 300mm on an occupied council semi. Fixing the wall before refilling is what makes the new insulation last.

  • 146m² of cavity wall treated
  • Around 150 spalled bricks replaced
  • Stormdry masonry protection
  • Loft upgraded to 300mm with raised boarding
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Cavity wall insulation programme across 13 homes in Winchester by Extract Energy
Cavity wall and loft programmeWinchester (SO22)

A street-by-street programme, Winchester: 13 homes in one month

Thirteen homes with failed cavity wall insulation extracted, ThermaBead refilled, and lofts upgraded to 400mm in September 2025. Full rubble clearance on every property where the borescope showed it was needed.

  • 13 homes completed in one month
  • Full rubble clearance before refill
  • Lofts upgraded to 400mm
  • Ventilation issues flagged and reported
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Foam insulation removal in Winchester referred by a local builder, Extract Energy
Foam insulation removalWinchester (SO23)

Breaking-down foam removal, Winchester: a builder's referral

A local builder found damp patches during repointing work. Rod-camera survey showed urea-formaldehyde foam bridging moisture from outer to inner wall. We extracted it, cleared the rubble and refilled.

  • Urea-formaldehyde foam extracted
  • Full rubble clearance
  • Cavity refilled with new insulation
  • Referred by a local building contractor
Read the full case study
Foam cavity insulation extraction in Winchester by Extract Energy
Foam insulation removalNear Winchester (SO21)

150m² of failed foam, Winchester: extraction and ThermaBead refill

A large house with 150m² of failed foam cavity insulation. We extracted it all, cleared the rubble, and refilled with ThermaBead bonded beads. The rear extension was surveyed and excluded — we only quoted for the walls that needed it.

  • 150m² of failed foam extracted
  • Full rubble clearance
  • ThermaBead bonded bead refill
  • Extension surveyed and excluded — only quoted what was needed
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Cavity wall fibre extraction on a coastal terrace in Southsea by Extract Energy
Cavity wall extractionSouthsea, Portsmouth (PO5)

Coastal terrace, Southsea: 130m² fibre extraction

A tall Southsea terrace with 130m² of wet fibre insulation and rubble in the cavity. We extracted and refilled, identified a single-skin gable section that could not be filled, and flagged brickwork repairs the customer needed to know about.

  • 130m² of fibre insulation extracted
  • Full rubble clearance
  • Single-skin gable identified and excluded
  • Brickwork repairs flagged to customer
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Cavity wall insulation removal at rented property in Andover by Extract Energy
Cavity wall removal and refillAndover (SP11)

Rented property, Andover: working around tenants

Borescope survey found vegetation growing inside the cavity of a rented property. 112m² extracted, cavity cleaned, Dry Rod DPC injected, gable bricks replaced, ThermaBead refilled. Arranged through the letting agent with tenants kept informed throughout.

  • 112m² of cavity wall treated
  • Vegetation removed from cavity
  • Dry Rod DPC injected
  • Gable bricks replaced
  • Arranged through letting agent
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Raised loft boarding and insulation upgrade in Gosport by Extract Energy
Loft insulation and boardingGosport (PO13)

Loft upgrade with storage, Gosport: insulation and raised boarding

Old flattened loft insulation removed, 300mm of new insulation fitted, and 16m² of raised loft boarding built on legs so the insulation keeps its full depth. Storage and warmth — not a compromise.

  • Old insulation removed
  • 300mm of new insulation fitted
  • 16m² of raised loft boarding on legs
  • Eave vent trays and lap vents fitted
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Loft insulation replacement for new homeowners near Chichester by Extract Energy
Loft insulation replacementNear Chichester (PO18)

New homeowners, Chichester: replacing old loft insulation

A couple who had just moved into a four-bed semi found only 100mm of old insulation in the loft. We replaced it and fitted boarding for storage. Moving in is the best time to sort the loft, before it fills up with boxes.

  • 100mm old insulation replaced
  • Upgraded to current recommended depth
  • Loft boarding fitted for storage
  • Completed before the family moved in
Read the full case study

Think your house has the same problem?

Book a free survey. We will show you what is in your walls or loft and tell you what we would do.

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.