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About J&J Crump & Son

We are an award-winning, family-run company established in 1987, and are proud to be one of the longest-established insulation and heating companies working in the energy efficiency industry.


A family business

Our head office is in Killamarsh, North East Derbyshire – ten miles from the centre of Sheffield – and the team is headed up by Managing Director, Stephen Crump who takes a very hands-on approach to running the company.

We are proud of our reputation for delivering good quality, reliable and competitive services and for building long-term successful relationships with our customers, local authorities, social housing providers and funding partners alike.

We have branches in Sheffield, Newton Abbot in Devon, The Isle of Wight, Tutbury and London which allows us to deliver our award-winning Warm-Up area-based schemes around the country.


Founded in


Energy efficiency measures installed


Of funding accessed for our customers

Our offices

Head Office

1a Nethermoor Lane
S21 1BZ

Tel: 0800 783 3127
or 0114 247 1098

South West

4-5 Hedley Units
Brunel Road
Newton Abbot
TQ12 4PB

Tel: 0800 917 6963
or 01626 362740

Isle of Wight

Unit 3a
Nicholson Road
PO33 1BG

Tel: 01983 215 681


Unit 2, Plot 6
26 Castlepoint Park
DE13 9HS

Tel: 0800 7833 127


Unit 7B
Barking Business Centre
Thames Road
IG11 0JP

A little about us

Working with partners – The Energy Company Obligation (ECO)

The company has grown and evolved over the past three decades and we are now one of the biggest ECO installing companies in the UK.

By partnering directly with Utility companies to access funding we can provide a complete service to individual customers to local authorities, housing associations and private landlords.

We also work with specialist companies and with energy agencies to continue to offer a quality service.

We are committed to supporting the communities that we work in and wherever we can, we employ local people to deliver these projects ensuring we do our bit to make communities sustainable.

Our business

We provide a diverse range of energy efficiency services to our customers. Let us help you to live in a cosy home.

  • Loft Insulation
  • Cavity Wall Insulation (Including Hard-to-Treat)
  • Gas Central Heating
  • Home Energy Surveys
  • External Wall Insulation
  • Internal Wall Insulation
  • Room in roof Insulation
  • Cavity Wall Tie Replacement
  • Cavity Wall Insulation Extraction
  • Solar PV
  • Air Source Heat Pumps
  • Smart Heating Controls

Award-winning company

J&J Crump & Son Ltd is very proud of the recognition it has received from industry bodies and the many awards it has picked up at both the Energy Efficiency and Retrofit Awards.

  • Winner South West Installer of the Year 2014 at the regional Green Deal and ECO awards.
  • Winner Vulnerable Customer Support Award 2019 at the South West Regional Energy Efficiency Awards
  • Winner Best Large-Scale Project Award 2019 at the North East Regional Energy Efficiency Awards
  • Bronze Business Development Director of the year 2019 – Steve Crump at the National Energy Efficiency Awards
  • Bronze Best Multi Measure Project of the year 2019 at the National Energy Efficiency Awards
  • Winner Best Large-Scale Project Award 2021 at the North East Regional Energy Efficiency Awards
  • Winner Best Large-Scale Project Award 2021 at the Greater London Energy Efficiency Awards

Fleet of vehicles

We have invested heavily in our fleet of specialist vehicles that are all designed for specific purposes.

Our heating engineers all have vans that are fitted and equipped with specialist equipment and tools needed to ensure they can deliver a professional service first time, every time.

Our cavity wall insulation vans are specially designed to enable efficient delivery of the insulation into your walls and we use different vehicles with bespoke equipment to install bead insulation and mineral fibre insulation.

We also have a fleet of vans that are bespoke to our loft insulation crews.

The right van – and the right crew – for the right job.

Experienced professional team

Our team of experts have many decades of experience between them. Our insulation and heating installers all have the appropriate training and professional qualifications.

Our business is based on continual recommendation – our customers recommending us to friends, neighbours and relatives.

As a company, we are committed to providing an excellent service and delivering products and services that precisely match our customers’ requirements.

The process of continuous improvement is firmly embedded within the Company and we achieve this through regular staff training and skills development to ensure our staff are always up-to-date with the latest developments.

Our aim is to do better than good practice: we want to provide the best practice.

Quality products

Here at J&J Crump & Son Ltd we use only the very best products that are best suited to your particular property and location.

We like to offer a choice wherever possible, depending on your needs and your budget. For example, we install mineral fibre cavity wall insulation materials as well as bead. Our boilers and other heating products are well-known and respected national brands, such as Ideal and Worcester-Bosch.

We will let you know what products we recommend, but the final choice is yours.

We're industry accredited professionals

We’re members of the leading industry boards.

J&J Crump & Sons Cosy Homes Rotherham Sheffield Yorkshire Energy Efficiency Measures Heating Insulation Solar PV How it Works RECC-TSI
J&J Crump & Sons Cosy Homes Rotherham Sheffield Yorkshire Energy Efficiency Measures Heating Insulation Solar PV MCS NIC EIC

Why customers choose us

We’re incredibly proud of the work we deliver and we’re always excited to hear what our customers have to say about our services.

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