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10 Years Insurance Backed Guarantee

10 Years Insurance Backed Guarantee

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FENSA Approved

FENSA Approved

Quality Manufacturers & Installers

Quality Manufacturers & Installers

Our Products

Celestial Windows specialises in the design, manufacture, and installation of upvc casement windows, in a range of colours and styles, to suit any home and taste. Our composite doors are reinforced and use only the highest security locking systems as standard ensuring every door is perfectly manufactured and installed to ensure your homes security whilst making your property look beautiful. Conservatories, orangeries, and garden rooms are designed hand in hand with the customer so that the space is built specifically for the differing needs of each family.

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Celestial Windows have been established since 1998 in Middlesbrough, but our experience goes further back than that! Our proprietor Alan Sewell has been working in the double glazing industry more than 40 years, and his main goal was to build a business based on trust, quality and customer service. We hold all relevant accreditations and everything we install comes with a 10 year insurance backed guarantee via dgcos for your peace of mind.

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We ensure everything we manufacture and install is of the highest quality and security. All of our installations carry a 10 year insurance backed guarantee, we are legally bound to honour any remedial works including hardware so its important that the quality of our product is built to stand the test of time. Our factory is situated right next door to our showroom so our customers are able to see the products going from manufacture to fit, and the care and precision that goes into that process.

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Our completed installations speak for themselves! Beautiful products with the highest quality hardware and locking systems fitted by a local family run company you can trust

Find Out What Celestial Can Do For Your Home…

We are currently redesigning our showroom over Riverside Industrial Estate, Middlesbrough so that our customers can see our range of state of the art products. Lately, we have all spent more time at home than ever. Your home is your sanctuary, your place to relax. At Celestial Windows we want you to love where you live. That’s why we carry a vast array of products in different styles to suit all tastes, with safety and security being of upmost importance.


Our team are always on hand to help with any enquiries you may have and if you don’t immediately see what you are looking for, we can help you find it. If you are unsure of your design, we can help you with ideas to ensure your installation is perfectly suited to you.


We have a vast array of products including French doors, bifold doors, sliding sash windows and more, all in a range of colours and most importantly manufactured to the highest standard and installed with a 10 year insurance backed guarantee.

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Celestial Windows is a trading name of Celestial Windows and Conservatories Limited

Authorised and Regulated by the Financial Conduct Authority. We are a Credit Broker and not a Lender. We offer Credit Facilities from one Lender