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Trusted Traders

Gas Mark One

Logo on white
Opening Hours
Today - 08:00–18:00
  • Monday 08:00–18:00
  • Tuesday 08:00–18:00
  • Wednesday 08:00–18:00
  • Thursday 08:00–18:00
  • Friday 08:00–18:00
  • Saturday 08:00–18:00
  • Sunday 08:00–18:00
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7 Reviews


We specialise in the service, installation and repair of Aga and Rayburn heating and cooking appliances. We work with gas, solid fuel and oil fired appliances.
we are also a approved Rayburn Heat Centre and have a range of beautiful cookers on display.

What we do

  • Heating contractors

    • Central heating systems (installation and servicing)
    • Oil fired heating equipment
  • Boiler, central heating and gas engineers

    • Boiler installation
    • Boiler repair
    • Boiler servicing
    • Gas cooker installation
    • Gas cooker repair
    • Gas emergencies
    • Gas fire repair and servicing
    • Gas safety testing and inspection
    • Power flushing
    • Radiators and central heating
    • Underfloor heating
  • More Services

    • aga
    • rayburn
    • lpg gas

Customer reviews

Reviews summary

7 reviews
Customer Service
Sort by
Very Professional
Customer Service
This is an excellent company and I can only reinforce the other very positive reviews. We have a house which is a mixture of old and new and we decided to completely redesign the central heating, hot water and cooking systems. This involved re-routing pipes, re-wiring, installing an oil-fired Rayburn, a wood burning stove, internal and external chimney work and bedding in a new oil tank in a new location. Mark organised all of the job, which was complicated, at times required working in cramped conditions and, despite the difficult problems which often arise with very old properties, was completed on time and on budget. When we made our initial inquiry we had an immediate response, were listened to and a very detailed estimate provided quickly. The service at that stage was far better than we had experienced elsewhere and this care, attention to detail and quality of work was typical of Mark’s attitude throughout the job. We have no criticisms, only praise, and will continue to use this company for servicing, etc. Highly recommended.
Customer in Monmouthshire22/02/2019
Excellent Service
Customer Service
Tenants reported no heating or hot water and a leaking radiator. Mark Barrier responded quickly to our call and carried out the repairs the same day. Full job report provided to enable us to keep our clients informed. Exceptional professional service and highly recommended.
Which? Trusted Traders Consumer06/11/2018
always quality
Customer Service
Regularly service our gas boilers and appliances and have installed a number of new appliances. Always found to be completely reliable and work completed to a high standard.
Which? Trusted Traders Consumer01/11/2018
Boiler installation and maintenance
Customer Service
I moved into a new house in 2013 and required a new boiler to be installed. Mark was able to review the heating requirements and recommend a boiler suitable for multi-zone heating house is split into two zones. Mark has serviced this boiler every year since this time. Always professional friendly and focused on detail. Ive always appreciated the detailed communication regarding any work that has needed doing.
Which? Trusted Traders Consumer19/10/2018
A professional job done.
Customer Service
Gas Mark One installed our new boiler 10 years ago and since then has carried out an annual service and occasional fault investigationsolution. He has always arrived promptly on the agreed day and has made the effort to attend quickly when a fault has needed attention. I am pleased to recommend his services to anyone and have already done so locally on a word-of-mouth basis.
Which? Trusted Traders Consumer02/10/2018
Aga repair
Customer Service
Gas Mark One have carried out a service of the aga. We are having problems with it cutting out and they are also helping us to find out what is causing the problem. To date they have been efficient at arranging appointments have come to do the work when agreed carried out work in a professional manner and followed up with phone calls or emails to see whether the aga has remained on.We feel confident that if the problem is not sorted they will return to look at it again.
Which? Trusted Traders Consumer10/08/2018
A good tradesman
Customer Service
Mark has done work for us for many years. This job was the installation of a new gas boiler. We had a comprehensive estimate which seemed very fair and the work was done quickly and with the minimum of disruption. Mark is quiet and very competent and inspires trust. I would recommend him.
Which? Trusted Traders Consumer18/10/2016