External wall insulation can prevent energy loss and cut your fuel bills significantly.



At Rockwarm we are always looking for ways to save you money on your energy bills.

Our trained surveyors can advise you on what level of insulation your home requires and advise what sort of grants are available.


External Wall Insulation

Insulating external solid walls can prevent energy loss and cut your fuel bills significantly.


Cavity Wall Insulation

Cavity Wall Insulation can save you up to 30% on your energy bills.


Loft Insulation

Increasing your loft insulation can save you considerable amounts on your energy bills.

Protect your home:
while adding value.

Miss Walker’s home valuation increased by over 5% after she had external wall insulation installed (as well as saving on her energy bills). Interested in finding out more? Get in touch.


“Just a word of thanks for the work carried out on my property. It has certainly made a big difference to the look of the house, and I am looking forward to lower fuel bills too.”

- Mrs. Tilley, Bedworth

“I am writing to express my appreciation for the excellent quality of work undertaken at my home recently. The work itself was of a high standard with the family noticing a difference almost immediately in the overall warmth of the house.”

- Mr. Low, Rugby

In 2013 and 2014 Rockwarm was involved in the delivery of an £830k home insulation scheme as the sole subcontractor to Kier Services, Coventry City Council’s framework contractor. The project used DECC funding to install measures such as insulation to external walls, cavity walls and lofts along with draught proofing and boiler replacement to the homes of around 100 disabled people across the city in very varied building archetypes.

There were two key requirements of the sub-contractor: firstly a high level of customer service when dealing with disabled and sometimes vulnerable residents and secondly the delivery of a high quality of workmanship so that residents are happy and the City Council is not exposed to claims in future years. Rockwarm delivered very well on both requirements and were open and helpful in project management meetings such that the City Council would be happy to engage them in the future on similar schemes.

Michael Checkley Coventry City Council

How much money can I save?

An average semi-detached home could typically save £450 – £500 per year on fuel costs (source: Energy Saving Trust) but this can be higher if your home is made even more energy efficient through the incorporation of thicker insulation as part of the external wall insulation system.

How durable is the system?

The EWI system is durable to withstand ‘normal’ wear and tear but should the system become damaged we can advise as to the best course of action to repair or replace the effected area(s)/system(s).

Are the systems approved?

All EWI systems that Rockwarm install are accredited to BBA Standards. the systems are also Energy Savings Trust Recommended and Rockwarm are members of the National Insulation Association (NIA), and SWIGA (Solid Wall Insulation Guarantee Agency).

Is there a guarantee?

Rockwarm currently offer a standard company guarantee certificate for all its external wall insulation systems, guaranteeing the materials for a period of 25 years. This guarantee is issued on each project at no extra cost.

Still have questions? Get in touch for answers

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About us

Rockwarm is a local family run business (Est. 1983) based in the Midlands, offering energy saving solutions across the private and social housing sectors.

We have over 30 years of successful trade behind us.

We have worked as approved contractors to the following Energy Providers over the last 10 years:

Homes Insulated

Insulated 250000 Homes

We have had very successful contracts with the following organisations in recent years.

Housing Associations
Bromford Group; Oxford Citizens Housing Association; Caldmore Housing

Local Authorities
Nuneaton & Bedworth BC; Rugby BC; Hinckley DC; Tamworth BC; Daventry DC; Northants BC; Kettering; Corby; Stratford On Avon DC; East Northants; South Northants BC; South Derbyshire DC

Meet the team

Hayley Allen
Customer Liaison Officer

Tracey Brannan
Customer Liaison Officer

Jane Lewis
Customer Liaison Officer

Sara Payne
Customer Liaison Officer

Charlie Miles
Quality Inspector

Steve Dawson

  • Call us on 02476 345554

    Or email [email protected]
    Rockwarm Insulation Ltd.
    4 Trident Business Park, Holman Way, Nuneaton, Warwickshire CV11 4PN

    Or send us a message