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Thermotech is based in the heart of South Wales and we are proud to serve residents and business owners within the Abergavenny area. We are able to install uPVC windows and doors, construct uPVC conservatories, orangeries and we can also build extensions. We are an experienced, professional and friendly team of building contractors who work closely with you to get the job done.

Windows in Abergavenny

We install uPVC windows in Abergavenny. We offer a window replacement service, replacing old wooden windows with new uPVC windows that are attractive and energy-efficient. We also offer aluminum and timber frames if that is your preferred choice. Our frames are available in a range of colours and styles, including casement and tilt & turn windows.

Door Installation in Abergavenny

Thermotech are happy to install a range of doors in Abergavenny. We have a range of composite front doors for you to choose from, in many colours and finishes, that are hard wearing and able to cope with extreme weather conditions. These doors also need minimal maintenance.

We also provide a range of doors for use in conservatories, orangeries and extensions. We are able to provide and fit uPVC doors, aluminum bifold doors, bifold sliding doors and patio doors.


If you live in Abergavenny and require a new conservatory, or simply wish to replace an old one, then we can help you. Our conservatories are available in both uPVC and hardwood. You can also choose from different styles, including the contemporary Edwardian style conservatory, the Victorian-style conservatory that can be used in any home, and the lean-to conservatory for those with limited room.


Thermotech offers an orangery build service within Abergavenny. Our orangeries make a great alternative to a conservatory, especially when you want that additional living space to feel more like a solid room or extension. The orangery differs from a conservatory as it is constructed with a solid roof that can incorporate a lantern.

Home extensions in Abergavenny

Here at Thermotech, we are a team of experienced builders who can build your desired extension. Our extensions build service is fully customised to your needs, including the use of uPVC windows and doors

You can do this via our online contact form, give us a phone or drop us an email.

Contact Us Today!
To learn more about the range of services available from us here at Thermotech in the Abergavenny area, then please do get in touch with us today. You can do this via our online contact form, or you can give us a call on 0800 917 1106. We look forward to hearing from you soon!



"From our first introduction to Thermotech through to the completion of the conservatory, our expectations were exceeded. From the foundation to installation the workmen were friendly, clean, polite and worked to a very high standard. My wife and I would recommend your company with confidence Thank you"

Mr and Mrs Evans, Rogerstone. conservatory installation

"The workmen were extremely conscientious, very clean and tidy when working. Very impressed with the quality of the products also. Our new front door exceeds our initial expectations. We would definitely use the company in the future and would recommend you to friends and family."

Mr and Mrs Body, Chepstow. New front door and window

"The whole process was excellent. The construction was very solid and well built with quality materials, especially the roof section and insulation which was magnificent. The workforce were also excellent especially your fitter with his superb skills. I can really recommend your services to anyone and would be happy to sing you and your companies praises"

Mr and Mrs Chapman, Magor. Solid roof sunroom

"Very pleased with the service provided by Thermotech. All workmen were friendly and Karl ensured their work was up to scratch throughout the process. Nothing negative to say- could not criticise and would definitely recommend and also use Thermotech again. Fantastic Job, great value for money and easy 10 out of 10 for overall experience."

Mr and Mrs Haddock, Blackwood Gwent. Conservatory installation

"We are delighted with our new conservatory. Karl managed the project and always responded quickly to any communications. The quality of the conservatory is excellent. Thank you Thermotech"

Mr and Mrs Morris, Caerwent Monmouthshire. Conservatory

"We are very happy with the excellent work involved in building our conservatory. Everything has been done to or satisfaction, quickly and efficiently. A job well done and we would have no hesitation in recommending the company in future."

Mr and Mrs Mitchel, Magor. Conservatory installation

"My wife and I would like to congratulate and thank you for erecting our conservatory to a very high standard indeed. Al workmen involved in the build were very polite, on time and worked extremely hard. Each and every member knew what was required of them to complete a first class conservatory. We are very pleased with the end result and would certainly recommend your company to others."

Mr and Mrs Edwards, Llangstone Newport, Conservatory installation

"Karl was very helpful and approachable throughout. All workmen involved in the installation were friendly and professional during the installation. Good after sales service when needed. Overall great company and would not hesitate to recommend or to use again. Already had many enjoyable and relaxing hours in the conservatory and look forward to many more."

Mr and Mrs Whittington, Shirenewton. Conservatory installation

"From the 1st telephone call asking for a quote to the fitting was like clockwork. Once order was excepted it was installed within 3 weeks. 1st class product, fitted by first class fitter by a first class company. Thanks."

Mr Wright, Chepstow

"Having seen the product at your showsite we knew what we wanted and the product fitted the bill in both quality and appearance. The installation of the door was carried out in an excellent manor, the fitters were extremely good, friendly and displayed excellent attention to detail. In conclusion, excellent product fitted by excellent staff"

Mr and Mrs Cramp, Tuthil Chepstow. Composite front door

Become our next satisfied customer

  • Expert Fitting Teams
  • 100% Satisfaction Record
  • Family Run Business
  • A Rated Windows as Standard
  • 10 Year Building Guarantee
  • Great Quality Products

Serving South Wales & the West

Based in Monmouthsire, we have been providing quality windows, doors, conservatories, roofs and building work all across South Wales and the West for over a decade. Come and visualise your home improvements by visiting our showroom in Chepstow.