Building work and Extensions
Whether you’re looking to add value to your home or simply want to create the home that you’ve always wanted, our team of experts can help you. We are a family run business, so we understand the importance of creating a space that you can enjoy with your family and friends. As well as offering a range of door and window solutions, we can also help you make your house a home. Our range of UPVC doors and windows South Wales homeowners trust can help to transform the feel of your property, adding both value and comfort. In addition to this, we also offer customers building and extension services, so if your dreams extend to more than just replacing your windows and doors, we’ve got you covered. We’ve been helping customers for over a decade and pride ourselves on guaranteed satisfaction.
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Building work and Extensions
- Industry wide knowledge with over a decade of experience
- Over a decade of guaranteeing customer satisfaction – hundreds of pleased households!
- Family run business – we understand your mindset
- Building work and services that cover the whole of South Wales and the West
- Effective project management and communication throughout
- Best quality and innovatively designed products on offer
Expert Fitting
Teams
Satisfaction
Record
Family Run
Business
A Rated Windows
as Standard
10 Year Guarantee of
All Window and Door Frames
Great Quality
Products
Our Extensions
Latest reviews
I would highly recommend Thermotech. I am so pleased with my new extension and windows. I found them experienced and professional from start to finish, with a high skill level in all areas.
Lorraine Bright
October 3, 2024Absolutely superb, nothing was too much trouble; they went above and beyond to give us exactly what we wanted. They gave me the 'boot room' I wanted, storage for shoes, dogs stuff and loads more. Warm, cosy and dry. Would definitely recommend to anybody, we will certainly be using them again. Can't thank Thermotech enough x
Wendy Dix
August 3, 2024Amazing service!! Came out and measured up after a break in into our showroom, made it secure. Then came within Two days and fitted new glass. Even cleaned up all the mess from the break in. Would recommend to anyone
marc potter
March 3, 2024Professional service from start to finish. Attention to detail and quality is Brilliant. Love my new front door. Thank you
Shannon Ryder
September 3, 2024I used Thermotech to replace a conservatory in March 2022. The quality of the installation has been tested by heavy rain on several occasions and it is completely waterproof. I have now used the company to install nine windows and a patio door. The windows were difficult to remove but this task was completed with minimum damage. The finishing work around the revels is of such good quality that there is no evidence that the windows have been changed. Thermotech is a family run business which supplies quality products at competitive prices. The team take pride in their work and ensure that they get the installation right every time.
Philip Jones
March 3, 2023Recently had a single storey extension completed by Thermotech. Very professional and helpful throughout the project. Big thanks to Steve for all his hard work. Pleased with the overall finish. Would recommend this company.
Andrea Clements
March 3, 2024They fitted us in quickly to replace some patio doors, and the man who came to fit them was so friendly and knowledgeable. They look fantastic, really smart, we're very happy with them. Will definitely use them again in the future if needed.
Harriet Challoner
October 3, 2024Thermotech brilliant yet again! Required some house roof advice and Thermotech called straight over. They arrive on time, never let anyone down and are just amazing. Thermotech are so trustworthy, professional and produce work of a very high quality. I wholeheartedly recommend them to everyone! Thank you ever so much Thermotech for always being so wonderful.
rhian
March 3, 2024🌟🌟🌟🌟🌟 Definitely a five star rating Absolutely delighted with the new front door! From the initial ordering process to the final fitting, the customer service was outstanding. The Thermotech team was incredibly helpful making the entire experience smooth and stress-free. The quality of the product exceeded my expectations, with exceptional attention to detail.The fitting was done with great precision, and the installers were professional and efficient. I couldn't be happier with the result. Highly recommend Thermotech to anyone.
Carla Higgins
January 3, 2025
🌟🌟🌟🌟🌟 Definitely a five star rating Absolutely delighted with the new front door! From the initial ordering process to the final fitting, the customer service was outstanding. The Thermotech team was incredibly helpful making the entire experience smooth and stress-free. The quality of the product exceeded my expectations, with exceptional attention to detail.The fitting was done with great precision, and the installers were professional and efficient. I couldn't be happier with the result. Highly recommend Thermotech to anyone.
January 3, 2025They fitted us in quickly to replace some patio doors, and the man who came to fit them was so friendly and knowledgeable. They look fantastic, really smart, we're very happy with them. Will definitely use them again in the future if needed.
October 3, 2024We have used thermotech on two occasions .the service we recieved from ordering to installation was excellent, Carl and Steve went out of their way to ensure a friendly and helpful experience we would highly recommend them to anyone thinking of having work done 5 star company phil&rose thompson
Phil Thompson
October 3, 2024I would highly recommend Thermotech. I am so pleased with my new extension and windows. I found them experienced and professional from start to finish, with a high skill level in all areas.
October 3, 2024Professional service from start to finish. Attention to detail and quality is Brilliant. Love my new front door. Thank you
September 3, 2024Absolutely superb, nothing was too much trouble; they went above and beyond to give us exactly what we wanted. They gave me the 'boot room' I wanted, storage for shoes, dogs stuff and loads more. Warm, cosy and dry. Would definitely recommend to anybody, we will certainly be using them again. Can't thank Thermotech enough x
August 3, 2024Thermotech brilliant yet again! Required some house roof advice and Thermotech called straight over. They arrive on time, never let anyone down and are just amazing. Thermotech are so trustworthy, professional and produce work of a very high quality. I wholeheartedly recommend them to everyone! Thank you ever so much Thermotech for always being so wonderful.
March 3, 2024Amazing service!! Came out and measured up after a break in into our showroom, made it secure. Then came within Two days and fitted new glass. Even cleaned up all the mess from the break in. Would recommend to anyone
March 3, 2024Cannot recommend highly enough - excellent. Karl responded to queries straightaway - great customer service, extremely knowledgeable. A fantastic installation experience. Steve is a highly skilled professional fitter with amazing attention to detail and exceptional quality of work. Everything was cleared up and left immaculate afterwards. Nothing is too much trouble. A huge thank-you to both.
Duncan Kew
March 3, 2024Recently had a single storey extension completed by Thermotech. Very professional and helpful throughout the project. Big thanks to Steve for all his hard work. Pleased with the overall finish. Would recommend this company.
March 3, 2024
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