Extreme Collection

Unmatched security and style

Bespoke designs, supreme security and exceptional value for money – just a handful of the reasons why hundreds of homeowners choose our Extreme window and door range. The purpose-crafted uPVC profile that’s used exclusively throughout the range creates a unique design that is made to match any home. Industry-leading security features keep your family safe and thermally efficient glazing options ensure your home warm remains warm in winter and cool in the summer.

Extreme UPVC Windows & Doors


The entire Extreme window collection has been designed to match any existing home décor. Sleek, slender frames achieve a uniquely minimalistic look, whilst offering the same robust qualities as traditional timber. There simply isn’t a more technologically advanced range of windows on the market today.

Affordable and adaptable, choose from our modern casement window or opt for something a little more traditional.


Extreme UPVC Windows


From the supremely functional to the elegantly stylish, there’s an Extreme door to suit every preference. With a huge selection of colours, styles and finishes, you’re sure to find something truly in keeping with your budget. All this is supplemented by an elegant selection of decorative glass, custom-built side screens and bespoke panel designs.

As ever, we place tremendous emphasis on safety, with all our doors fitted with the latest high-performance security locks.


Extreme UPVC Doors


French doors are perfect for a stress-free opening and closing, an ideal selection for families looking for maximum practicality.

Strong, durable and stylish, our Extreme French doors are amongst our more popular options, ensuring your doorway becomes a truly grand opening.


Extreme UPVC French Doors


Sliding patio doors are the ultimate space saver, allowing for easy opening without the need for internal or external obstruction. Having grown exponentially in popularity in recent years, extra-large patio doors are as stylish as they are practical.


Extreme UPVC Patio Doors

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Want to speak with an Advisor? Give us a call on 0800 220 415

The Mitchell Glass team will be pleased to help with any questions you may have.

Customer Reviews

A difficult one to organise due to covid restrictions and delays in production out with Mitchell’s control but I felt...

Windows & Doors St Boswells
Claire McPhee – 28th Sep 2020

Very smooth process, always prompt replies to any questions. Delighted with our new windows are door. Thank you.

Windows & Doors Edinburgh
Mary Traynor – 24th Sep 2020

We are highly delighted with our sunroom it is very smart and it is comfortable and wish we had done...

Windows & Doors Galasheils
James Fisher – 28th Aug 2020

Kevin and Stephen were very professional and friendly. Very pleased with workmanship.

Windows & Doors Uddingston
Mr W Swann – 18th Jun 2020

Windows & Doors Dolphinton
Neil Hayes – 22nd Mar 2020

Excellent service and product

Windows & Doors Kelso
Caroline Burgess Blake – 11th Mar 2020

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R Mitchell (Glass) Limited at Currie Road Galashiels TD1 2BP (VAT No. 272 252 081).  Financial Services Registered No. 808089 is a credit broker and is authorised and regulated by the Financial Conduct Authority. Credit provided by Hitachi Personal Finance, a trading style of Hitachi Capital (UK) PLC, authorised and regulated by the Financial Conduct Authority (Register No. 704348).