Energy Giants
Retrofit insulation materials on a construction project

The retrofit contractor that turns up with its own crews.

Whole house retrofit, insulation, roofs, heating and solar, delivered in occupied homes for councils, housing providers and main contractors, with the retrofit assessment and coordination done by our own people under PAS 2035. Led by Miles Sharples, who has run programmes for local authorities, housing associations and energy suppliers across the UK.

Talk to us about a programmeSee the work
PAS 2035 coordination in house
PAS 2030:2023 for flat roof insulation
TrustMark registered
Why choose us

Why Choose Energy Giants

Skilled Workforce

Our own trained crews, not a rotating cast of subcontractors, so the standard on the first home is the standard on the last.

Nationwide Coverage

Head office in Clitheroe, offices in Manchester and London, and programmes delivered across the UK.

Accreditations

PAS 2030:2023 certified for flat roof insulation, PAS 2035 retrofit assessment and coordination in house, TrustMark registered, insurance backed guarantees.

End to End Support

From initial survey through to installation, aftercare, and guarantee registration.

Customer Focused

Dedicated project managers and clear communication throughout every project.

Retrofit services

What we install

All of our retrofit installations are covered by our own guarantees, giving you peace of mind that your investment is protected for up to 25 years.

Flat roof insulation on a UK property

Flat Roof Insulation (FRI)

Our warm flat roof insulation system is installed on top of the existing roof deck, creating a thermally efficient barrier that significantly reduces heat loss through the roof.

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Internal wall insulation being installed in a home

Internal Wall Insulation (IWI)

We offer multiple IWI systems including multiple internal wall insulation to suit different property types. Our installations include radiator extensions, pipe alterations, and all associated works.

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Room in roof loft conversion space

Room in Roof Insulation (RIR)

Using certified insulation systems, we insulate rooms built into the roof space. Our service includes optional extras such as new stud walls, plasterboard, and skim finishes.

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Cavity wall insulation being installed at a property

Cavity Wall Insulation

We install cavity wall insulation by drilling and injecting blown mineral wool to specification, and by extracting failed fill where an earlier installation has slumped or got wet.

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Loft insulation material ready for installation

Loft Insulation

A quarter of heat is lost through the roof in an uninsulated home. Our loft insulation service helps homeowners save significantly on heating bills year after year.

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Under floor insulation beneath a suspended timber floor

Under Floor Insulation

Insulating beneath suspended floors cuts draughts and heat loss, making the ground floor noticeably warmer and cheaper to heat.

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Accreditations

Accreditations & Compliance

Track record

Recent programmes, written up properly.

Real figures, real dates, our scope stated. Each one has a full case study.

Aspire Housing, Staffordshire

Principal delivery partner on a £1.3m whole house retrofit programme funded through Warm Homes: heating and hot water, ventilation, windows and doors, loft insulation. Every home upgraded in year one reached band C. Running to 2028.

Kirklees Council, West Yorkshire

Failed cavity wall insulation extracted, walls dried, damp proofed and refilled across council stock under a housing framework. 51 homes by July 2026, £200k contract, residents at home.

Torentum Court, Fleetwood

Flat roof insulation package for Regenda Homes: 768 m² of new warm roof over fifteen roofs and 179 m of tiles reinstated, first package of a £700k programme, under our PAS 2030 certification for flat roof insulation.

All case studies
FAQs

Questions from clients and main contractors

Do you take subcontract packages?

Yes. We work as principal delivery partner and as a subcontractor to main contractors, delivering a measure or a whole package. See the sub contracting page.

Who does the PAS 2035 assessment and coordination?

Our own people. A named retrofit coordinator, a design for each property rather than a blanket specification, photographs at every stage and a file at handover the client can audit.

Which measures are you certified for?

PAS 2030:2023 for flat roof insulation (measure B5), TrustMark registration and insurance backed guarantees through Bluedrop. Every certificate, with its scope and expiry, is on the accreditations page.

Do you work in occupied homes?

As standard. Residents stay in, access is planned with the client, and the resident liaison sits with the office team rather than with whoever is on the van that day.

Which funding streams do you deliver under?

Warm Homes: Local Grant and Warm Homes: Social Housing Fund programmes, council housing frameworks, and energy supplier obligation work, with the paperwork each one needs.

Ready to start?

Talk to us about your next programme.

Tell us the stock, the measures and the funding, and we will come back with a measured, priced package and the certificates to go with it.

Talk to us about a programmeSub contracting →

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