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At Colin’s Sash windows we don’t only supply uPVC sash windows! We supply different types of high-quality traditional casement windows at affordable prices. One of the nicest designs is the French casement window where you open both sides with no vertical bar in the middle.

Getting one of our products is among the best ways to save money on energy bills in the long run. If you’re looking to reduce your window replacement cost you can buy our uPVC replacement windows with confidence.

UPVC Casement Windows

We’ve selected the double glazed Deceuninck 2800 system which provides homeowners who are looking for high-quality, energy-efficient replacement windows that provide excellent performance and durability. It really is a great choice of double-glazing window. Some people think PVC for windows isn’t environmentally friendly but in fact it’s 100% recyclable!

Aluminium Casement Windows

We supply the UK’s biggest selling aluminium double glazed windows designed by Smart Systems.
The aluminium window price is quite a lot higher than uPVC windows but slimline aluminium windows like Alitherm 300 and Smarts Heritage windows that match our steel look French doors look more modern and let more light through.

Flush Casement Windows

We’ve chosen the Deceuninck Heritage flush casement uPVC window. (They’re sometimes called flush sash windows). Flush fit uPVC windows cost more than normal uPVC windows but that’s not to say they’re worth the higher cost.

Timber Casement Windows

We don’t sell as many wood casement windows these days. They need painting every few years and they’re expensive. Our bespoke timber double glazed windows are made in Northern Europe where the big sustainable forests are located.

Contact Colin’s Sash Windows

We are happy to receive your call every day from 8am to 8pm! If you don’t feel like talking on the phone, you can just e-mail us at, or send us a message through our easy-to-use online form. We will contact you as soon as possible with a quote ready to be discussed.

Get In Touch

Please fill out the form below to send us an email and we will get back to you as soon as possible.

Contact Info

Working Hours 8:00 AM - 8:00 PM, Mon - Sun

WhatsApp 07930 098867

Fax 01525 552141

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