Energy Giants
Sub contracting · UK wide

The retrofit subcontractor local authorities, housing providers and main contractors keep on the programme.

Insulation, flat roofs, solar and heating, installed at scale in occupied homes under PAS 2030 and TrustMark, with our own crews and a director who has run programmes for councils, housing associations and energy suppliers across the UK.

Partner with Energy Giants See the work
460+homes retrofitted in recent council and housing programmes
£3.4mof retrofit programmes our team has delivered
20+years of retrofit at scale
3offices: Clitheroe, Manchester, London

Programmes delivered for

Main contractors, councils and housing providers already know how we work.

We work as a subcontractor to tier one retrofit contractors, and our Managing Director, Miles Sharples, has directed programmes for these local authorities, housing providers, delivery partners and energy suppliers. More about Miles →

Tier one contractors

Bloxt Limited
Gaia Energy
Keco Energy
UKEM
Next Energy

Local authorities across the UK

Kirklees Council
Durham County Council
City of York Council
Ribble Valley Borough Council
Cheshire East Council
Birmingham City Council
Northumberland County Council
Liverpool City Council
Knowsley Council
Sefton Council

Housing providers and delivery partners

Aspire Housing
North Star Housing
The Regenda Group
EcoGee
Sureserve
LivGreen
BroadOak

Energy suppliers

Octopus Energy
British Gas
Utilita Energy
E.ON Next
Northumberland County CouncilDurham County Council250 homesNorth Star Housing100 homesCity of York Council60 homesKirklees Council51 homesRibble Valley Borough CouncilSefton CouncilLiverpool City CouncilKnowsley CouncilCheshire East CouncilBirmingham City Council

Where we work

Recent retrofit programmes from Birmingham to Northumberland

Retrofit programmes our team has delivered and project-directed for councils and housing providers across England. Hover or tap a name to find it on the map, and open the case studies for the full story.

  1. 1Northumberland County CouncilMorpeth
  2. 2Durham County CouncilFerryhill, Shildon and Evenwood250 homesRead the case study →
  3. 3North Star HousingDarlington100 homesRead the case study →
  4. 4City of York CouncilYork60 homesRead the case study →
  5. 5Kirklees CouncilHuddersfield and Dewsbury51 homesRead the case study →
  6. 6Ribble Valley Borough CouncilClitheroe
  7. 7Sefton CouncilBootle and Southport
  8. 8Liverpool City CouncilLiverpool
  9. 9Knowsley CouncilHuyton
  10. 10Cheshire East CouncilCrewe and Macclesfield
  11. 11Birmingham City CouncilBirmingham
Why choose Energy Giants

The subcontractor you can rely on

Skilled & Competent Workforce

Fully trained, accredited professional tradespeople ready for any project scale.

Nationwide Coverage & Modern Fleet

UK wide operations with modern equipped vehicles for efficient project delivery.

Accreditations & Compliance

PAS 2030:2023 certified for flat roof insulation, MCS certified for solar PV and battery storage, TrustMark registered, and insurance backed guarantees on our installations.

End to End Project Support

Works as an extension of your client teams from start to completion.

Customer Focused & Professional

Professionalism and respect in occupied homes, every time.

Our services

Specialist installation services

Every measure surveyed, photographed before, during and after, and handed over with the paperwork your retrofit coordinator needs.

A warm flat roof finished in EPDM rubber by our crew in Llanrwst

Flat Roof Insulation (FRI)

Warm roof build ups on flat and low pitch roofs: strip, deck, insulate, membrane, kerbs and outlets, with tiles lifted and reinstated at every abutment. Our PAS 2030 certified measure.

A long street of red brick terraced houses: the solid wall homes internal wall insulation is made for

Internal Wall Insulation (IWI)

Solid wall properties insulated from the inside, room by room, with residents in place and the finishes made good.

Gabled dormer windows set into a slate roof

Room in Roof Insulation (RIR)

Converted lofts and dormers insulated properly, including the slopes and stud walls that get missed.

A street of post-war brick semi-detached houses, built with cavity walls

Cavity Wall Insulation

Cavities surveyed, filled and certified, with extraction where an earlier fill has failed.

Chimneys and rooftops along a terraced street

Loft Insulation

Loft insulation to programme depth with ventilation, walkways and tanks dealt with rather than buried.

Twenty two black Aiko panels we installed on a natural slate roof in Great Harwood

Solar PV and Battery Storage

In roof and on roof arrays with storage, designed and installed by our own team, from single homes to whole schemes.

All installations include pre, mid and post photography and an insurance backed guarantee.

On site

Our crews, our photographs.

No stock images here. Torentum Court in Fleetwood before and after our fifteen flat roofs, and the warm roof build up our crews put down on every job, photographed as it went in.

Torentum Court from above in August 2025, before the flat roofs were renewed
Before · August 2025
Torentum Court from above in March 2026, with fifteen renewed flat roofs
After · March 2026
A vapour control layer laid over an existing flat roof in Ruthin
Step 1Vapour control layer over the existing roof
Foil faced PIR insulation boards laid across a flat roof in Llanrwst
Step 2140 mm of foil faced PIR insulation
A new OSB deck fixed over the insulation on a flat roof in Ruthin
Step 3A new OSB deck fixed through
A finished EPDM rubber membrane on a flat roof in Ruthin
Step 4EPDM rubber, edges and trims

Every property is photographed before, during and after for the retrofit file. See every case study →

Certification

The paperwork that lets funded programmes use us

Every accreditation below is issued by an independent body, has a published scope, and can be checked. We say what each one covers rather than waving a logo.

PAS 2030:2023 certified

The British Standard for installing energy efficiency measures in existing buildings, and the certification government backed retrofit requires for each measure. Certified measure: B5 flat roof insulation. Certificate SICI23052 P2030 1, held by Efficient Energy Systems Ltd.

View the certificate

TrustMark, Government Endorsed Quality

TrustMark registered

The government endorsed quality scheme for work in and around the home. Registration is what a funded programme checks first, and what gives the resident a route to redress if anything goes wrong.

Verify a business at trustmark.org.uk

Insurance backed guarantees

Accredited under the Bluedrop Insurance Backed Guarantee facility as an Accredited Installation Management Company, so the workmanship guarantee on our installations is insured rather than resting on us alone.

View the accreditation

All our accreditations, with scopes and expiry dates

Track record

Recent work, written up properly

Real figures, real dates, our scope stated exactly. Read them the way a procurement team would.

Torentum Court, Fleetwood, from above with its fifteen renewed flat roofs
Flat roof insulation · Fleetwood

Torentum Court: fifteen roofs under a £700k retrofit

768.75 m² of new warm roof and 179 m of tiles lifted and reinstated inside EcoGee’s programme for Regenda Homes, with residents at home throughout.

Read the case study →
Rooftops and a church tower across a Kirklees town, West Yorkshire
Cavity wall remediation · West Yorkshire

Kirklees Council: failed cavity fill out, walls dried and refilled

51 occupied council homes by July 2026 under a framework programme running to 2028, led end to end by Miles Sharples.

Read the case study →
A hand adjusting a heating control in a warm living room. Illustrative image
Whole house retrofit · Staffordshire

Aspire Housing: £1.3m of Warm Homes retrofit

Heating, ventilation, windows, doors and loft insulation across occupied social housing, coordinated in house to PAS 2035.

Read the case study →
Black solar panels set flush into a new slate roof at The Rising Sun, Haverigg
In roof solar and storage · Cumbria

The Rising Sun: 10.92 kWp set into a new slate roof

An in roof array fitted as the pub was re slated, with 35.72 kWh of storage behind it.

Read the case study →
A semi detached house in Ruthin with its garage flat roof newly finished in black EPDM and white fascia
Flat roof insulation · Ruthin

Garage flat roof, Ruthin

A worn felt garage roof rebuilt as a warm roof: vapour control layer, 140 mm of PIR, new deck and EPDM rubber.

Read the case study →
The finished EPDM warm roof over a rear extension in Llanrwst, with new white edge trims
Flat roof insulation · Llanrwst

Rear extension roof, Llanrwst

A stained, ponding felt roof over a kitchen extension rebuilt as a warm roof with 140 mm of PIR and EPDM, in one working day.

Read the case study →
A finished flat roof and new white fascia above a bay in Litherland, with scaffold still up
Flat roof insulation · Litherland

Extension roof, Litherland

An L shaped extension roof rebuilt over two days as a warm roof: 140 mm of PIR, new OSB, EPDM rubber and new white fascias.

Read the case study →
How we work on your programme
  • Surveyed and priced measure by measure, not by the square metre of a brochure
  • Sequenced with your other trades so nobody waits on us
  • Pre, mid and post photography on every property
  • Occupied homes: access, noise and scaffold managed with residents, not around them
  • Handover packs ready for the retrofit coordinator and the funder

Need it for a tender? Download the Torentum Court one page summary (PDF)

Breadth of experience

Two decades, every measure, most of the map

Energy Giants is led by Managing Director Miles Sharples, who has spent twenty years delivering retrofit at scale: area wide programmes for local authorities, stock investment for housing associations, and supplier funded schemes where the compliance file matters as much as the install. That experience is what a subcontractor brings to your programme, along with the crews.

We install across the UK from our HQ in Clitheroe and offices in Manchester and London, on everything from a single flat roof to a whole scheme, and we are as comfortable in a Victorian terrace as on a 1960s independent living block.

Who we have worked with, in full →

Measures we deliver

  • Flat roof insulation (PAS 2030 certified measure)
  • Internal wall insulation
  • Room in roof insulation
  • Cavity wall insulation and extraction
  • Loft insulation
  • Solar PV, in roof and on roof
  • Battery storage
  • Air source heat pumps
  • Roofing and re roofing alongside the measure
Recticel PIR insulation boards laid across a flat roof in Litherland by our crew
Get in touch

Ready to partner with us?

For subcontracting enquiries, contact us directly.

Sub Contracting Enquiries
miles.sharples@energygiants.co.uk
General Enquiries
hello@energygiants.co.uk

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