My HIU heating system works perfectly now.

Osa Ayanru from Colindale, North West London – NW9. ( 27th of March )
Excellent service, punctual and efficient. My HIU heating system works perfectly now.

Justin quickly identified the issue and fixed the HIU right away

Sylvia Wu from New Cross, South East London – SE14. ( 7th of April )
I chose Add Detail based on the positive reviews on Google and TrustPilot and it has been a fantastic experience. Thanks very much Sigis for sending an engineer literally 4 hours after booking. Justin quickly identified the issue and fixed the HIU right away + checked all the radiators in the flat. Very much appreciate the efficiency and professional service, just as suggested in other reviews 🙂 Would be more than happy to choose Add Detail again and recommend to friends. Wish you all the best.

They were really good on communications and offer competitive price.

Ichi from Bermondsey, South East London – SE16. ( 14th of April )
They were really good on communications, offer competitive price, have excellent technical skills and most importantly good people. They also went extra miles for me to accommodate my request and yes I am extremely satisfied. There are so many “bad job” delivered by some plumbers and engineers. They are not one of them, my neighbor also started using them as well! Thanks 🙂

HIU Service

We offer an end-to-end HIU servicing solution, ensuring your system is running at optimum efficiency saving you time and money

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HIU Repair

All our London based HIU repair specialists are highly equipped to diagnose faults quickly and on the first visit, saving you time and money

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All HIU Services

All HIU Services including repair, maintenance, replacement & installation, emergency service and group booking options.

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HIU Contract Maintenance Services

Add Detail has over 15 years of rich experience in the commercial heating industry and in offering end-to-end HIU solutions.

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 We install gas cookers, perform gas leak detection and gas safety tests.

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Heating & Boilers

Services include repairing leaks to full heating system installations,  full boiler installation, service and repair.

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Our services include hanging doors. replacing or installing skirting boards, wood panelling and bespoke fitted furniture.

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Services range from fixing leaks and clearing blocked pipes, to shower pump repairs and complete bathroom suite installtion

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HIU Engineers, Gas & Heating Engineers, Plumbers and Carpenters in London and surrounding areas

Add Detail are able to provide HIU engineers, plumbers, heating engineers, gas safety engineers & boiler installations, electricians and carpenters to residential properties across London.

The dedicated team of craftsmen at Add Detail work around the clock to ensure that every piece of work, whether it be an emergency plumbing job or HIU repair or service, is completed to exceptional standards that they are proud of.

Our team whether they be HIU engineers, plumbers, carpenters, gas or boiler engineers, all live and work in London, and therefore both know the area intimately, and, are never more than a stone’s throw away should you need their support.


Need something fixing? Looking to improve you home? We will get back to you within 24 hours.



To find out more about our services or to discuss your requirements, get in touch.