R J O'callaghan is a West Midlands based company Specialising in External Wall insulation & rendering of buildings, Both private and commercial . We provide our skills and labour to private households, Builders, Architects, local authorities and government bodies. Many of our customer's have commented how they love our approach, we work with the customer to ensure a stress free install there is no hard selling all quotes are free. We are a family run business


We are so proud of the work that we do for our customers. Please take a moment and read what they have to say about their experience.


Here is our gallery of some of the projects we have been involved in.


Offering you the very best insulation & rendering service

We strive to offer you the very best External wall Insulation & rendering service, working in and around Coventry Warwickshire, west midlands & surrounding areas.

We at R J Ocallaghan External Wall insulation & Render Systems take customer service to the next level.

There are no hidden costs and quotes are free,

  • Over 19 years experience
  • Approved installers
  • FREE quotes available
  • All work guaranteed
Please contact me via our contact form to discuss your EWI and Rendering requirements.
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Ricky O’callaghan

Managing Director
With over 17 years industry experience, Ricky undertakes his work quickly, effectively and at a very reasonable price, plus he loves a cup of tea!