Door suppliers and installers in Oswestry & Wrexham

Tired of getting your doors repaired over and over again? Switch to a durable alternative with Composite doors from Thermseal Windows. Designed to keep your property warm and dry throughout the colder months, our Composite door panel collection has something for everyone.

Available in both traditional and modern styles, our doors offer great heat and noise insulation due to their high-density core. They are also energy-efficient, maintenance-free, and simple to clean and offer the ideal fusion of efficiency and style.

To make sure that our products not only live up to expectations in terms of safety and security but also look fantastic, our door fitters will collaborate with you to understand your requirements. For the best experience, we also provide comprehensive door installation services at competitive prices.

We offer the very best option for exterior, patio and bi-folding doors in and around the Oswestry and Wrexham area.

Whether on the front of the house or the back, doors can be every bit as important as windows when it comes to not just the image of a home, but also the security and efficiency. We work closely with all clients to ensure that our products not only measure up to expectations regarding safety and security but also look great in the process.


A wide range of accessories

We have a fine selection of beautiful accessories for our composite doors including an array of elegantly styled and finished hinges, handles, letter plates and door knockers. Whether you’re seeking a modern or traditional looking composite door, you will find an accessory to really make your door stand out.

We source our doors from reliable companies

We have narrowed the market and have found these two suppliers to be the best for security, quality and value: Residor and Solidor.


We offer a large range of composite door colours from stock. Choose colours inside and/or outside of the door, with many frame combinations. Amongst our hugely diverse colour range is a number of industry firsts including Rich Aubergine, Chartwell Green, Duck Egg Blue, French Grey and Irish Oak.

Security – Secure as Standard

Britain’s most secure composite doors have just got even better thanks with our revolutionary locking system.


The most conventional of our garden doors are of course patio doors, but even with this solid mainstay, customers still have plenty to choose from. While fairly conventional in what they achieve, we can design and build two, three and four pane versions and create doors of up to six meters in width. Security is enhanced not only through the toughness of the glass, but also through the use of police-approved security systems.

Please call us to discuss your requirements 01691 674759 or 07514 732585 or book an appointment.


Bi-Folding Doors will create an instant talking point in any home, by folding the doors to the sides, they are able to open fully, allowing you unrestricted access to your patio area or garden. Our UPVC & Aluminium Bi-Folding Doors, when closed, create a glass wall effect that allows a greater amount of light into your home, allowing you to gain more enjoyment from your garden whatever the weather. 

 Please call us to discuss your requirements 01691 674759 or 07514 732585 or book an appointment.

Get in Touch

Enhance your home security and appearance with versatile uPVC doors from Thermseal Windows. Designed to be energy efficient, our doors not only provide the best security but can also elevate your home’s overall appearance. For further information, please contact us at 01691 674759 / 07541 732585 or email us at


We are delighted with our new conservatory and Guardian Warm Roof.  We now have a room we can use all year round. The installation was painless, the workmen cleared the site, removing old and installing new in 5 days.
I would highly recommend Thermseal Windows.

David Jones

Great service from start to finish. From placing our order to having the windows and doors installed was only a few weeks. The installation was stress free and we were asked if we were happy with each stage as completed. The product looks great, very happy customers and would definitely use Thermseal again in the future.

Rowena Poyntz-Wright

Absolutely fantastic. What a difference. Tony did an amazing job fitting windows and doors to the whole house. He was very clean and tidy and did a superb job! Thanks again Tony.

Tanya Louise Davies

I sent an emergency appeal out on Ask Oswestry. Thermseal came to my rescue within an hour. prompt efficient friendly service. 100% recommend this company fabulous. Thank you so much.

Gail Farnsworth Pre Moulders

Highly recommended. Tony came early than expected, very helpful and sorted out our holiday lets conservatory doors within half an hour. Thanks Tony.

Sandra Williams

Brilliant service. Had a small job ( replace guttering to front of house) to do that i needed sorting asap. Contacted Tony in the week and he quoted very quickly and reasonably. Agreed to what work I wanted done and he was there on the weekend sorting it. I enquired about another job that I thought needed doing. He was honest and open about it not needing doing yet. Any tradesman who only recommends on what works needing doing rather than chasing pounds is rare.

Jon-Anders Rowlands