Scores based on 11 reviews

Reliability & timekeeping

Invoice history based on 4 reviews.

Invoice History
Charged as per quote / estimate100%
Appointments reported as missed (6 months) 0
Average score 9.59
11 reviews
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Cornerstone is a family run business specialising in energy efficiency measures, including insulation, heating and renewable technologies.  We have been working across East Anglia and the South East since 2004 and have a reputation for excellent quality standards and customer service.

We are experts in installing External Wall Insulation, Internal Wall Insulation, Cavity Wall Insulation and Loft Insulation.  We are a member of the leading insulation trade body - the National Insulation Association - and have installed insulation in over 10,000 homes to date, including on coordinated schemes run by various local authorities. 

Cornerstone also installs a range of renewable technologies incluidng solar panels, biomass boilers and heat pumps.

There is often funding available for the installation of energy efficiency measures, dependent on household circumstances - contact us for more information or a quotation.


Based in

Harleston, Norfolk, IP20 9EA

Works in

Bedfordshire, Cambridgeshire, Essex, Kent, Lincolnshire, London, Norfolk, Suffolk, Surrey, Sussex