Windows, Doors & Conservatories in Essex

your trusted local experts in windows, doors & conservatories

With years of experience and a commitment to quality, we are your trusted local experts in windows, doors, and conservatories across Colchester and Essex, delivering exceptional craftsmanship and service you can rely on.

Rated 5 Stars

Spectrum Glazing is proudly rated 5 stars by our customers for exceptional quality and service.

Certass Registered

Spectrum Glazing is proudly Certass registered, offering self-certification. We ensure trusted quality and compliance in window and door installation.

10 Year Guarantee

We provide 10-year insurance-backed guarantees through QANW, giving you complete peace of mind.

Finance options Available

Finance options are available, allowing monthly payments for double glazing installations. This makes upgrading your home's double glazing more affordable than ever.

Free Double Glazing Quotations

If you’re searching for double glazing in Colchester or throughout Essex, Spectrum Glazing offers expertly installed windows, doors, and conservatories designed to enhance energy efficiency, security, and style. We proudly serve homeowners in Colchester, Clacton-on-Sea, Brightlingsea, Chelmsford, and the surrounding areas, providing top-quality installations backed by reliable guarantees and exceptional customer service.

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Explore Our Double Glazing Product Range

Discover premium aluminium and upvc windows, doors, conservatories, and roofing systems with Spectrum Glazing—designed for durability, style, and energy efficiency.

silka karben aluminium entrance door — Front Doors

ultraframe conservatories clacton on sea — Conservatories

replacement conservatory roofs — Conservatory Roofs

origin aluminium bifold doors — Bifold Doors

how much does double glazing cost in Essex?

The cost of double glazing in Essex can vary depending on the size, style, and materials chosen. For typical price guides, uPVC windows generally range from £500 to £1,500 per window, depending on size and features. Composite doors are priced between £1,000 and £2,000, offering a stylish and secure entrance to your home. Bifold doors, which are perfect for creating open, light-filled spaces, typically cost between £2,500 and £5,000, depending on the number of panels and specifications.

Conservatory roof replacements, a popular upgrade for improving energy efficiency, usually range from £9,000 to £15,000, depending on the size and type of roof. At Spectrum Glazing, we provide competitive pricing and flexible finance options to make these upgrades more accessible. Contact us for a free consultation and personalised quote.

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Trusted Double Glazing Installers in Colchester

We’ve completed installations across Essex, including:

Victorian homes in Colchester
Coastal properties in Brightlingsea
Family homes in Clacton-on-Sea
Modern developments in Chelmsford

Our team understands the specific needs of homes in Essex, from insulation performance to coastal weather resistance.

Latest Double Glazing Projects

Aluminium Anthracite Grey Bifold doors Colchester — Bifold Door Installed in Colchester

Replacement windows and doors Brightlingsea — Double Glazed Windows Fitted in Brightlingsea

Hup Glass roof extension Dedham — hup! Extension built in Dedham

Conservatory Roof Replacement Thorrington Essex — Conservatory Roof Replacement Thorrington

Simple Double Glazing Installation Process

Your Free Initial Consultation

Everything begins with a friendly, no-obligation conversation. We visit your home to understand your specific needs, taste, and budget.

Precision Measurement Survey

Accurate measurements are the secret to a perfect, draught-free fit. Once you approve your quote, our professional surveyors will arrange a convenient time to visit your home.

Custom Manufacturing

With the measurements complete, your order moves to the manufacturing stage. We craft your new double glazing using premium materials designed to withstand the unpredictable British weather.

Seamless Installation

Installation day is when the magic happens. Our experienced, fully trained installers arrive promptly at the agreed time. They begin by preparing the work area, laying down protective dust sheets to keep your floors and furniture completely clean.

Aftercare & ten year guarantee

Every window & door we fit undergoes a strict final inspection to guarantee it meets our rigorous standards. We check the seals, test the locking mechanisms, and inspect the finish. This meticulous attention to detail ensures your home stays warm, quiet, and secure for decades

Customer Reviews

Spectrum Glazing - Windows, Doors & Conservatories

4.7

Based on 25 reviews

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Claire and dave Job

16:05 18 Apr 26

We had two replacement windows with Spectrum. Both the ordering and fitting were simple and efficient. It took 4 weeks from ordering to fitting. The team that fitted the windows were friendly but professional. We would recommend this company.

David Rich

09:20 18 Apr 26

Had full house window and door replacement and the works are lovely. Guys on site were nice and friendly and we would highly recommend.

Maxine Long

17:42 16 Apr 26

Richard and the team were wonderful with our tricky small extension/garden room. We had 3 different building companies tell us we had no options to extend. Richard was solutions focused and listened carefully to understand what we wanted to achieve. He used reputable and high quality subcontractors for parts of the build and we are thrilled with the results. While we've only gained an extra 15m2 on our downstairs, it's completely transformed how we use the space as a family and means we can finally entertain.

Sonia

00:17 06 Apr 26

Spectrum replaced a number of windows and a door for us over two months ago. The installation went well but we are still waiting for the CERTASS Certificate and have chased a few times by phone, WhatsApp and email but can’t get a response.
Are you still trading?

Julie Mann

11:29 11 Feb 26

We couldn’t be happier with the service from Spectrum Glazing. Rich was really great in helping us achieve exactly the look we were going for and the fitters, Phil & Mark were great from start to finish, working skillfully throughout the day (and in the pouring rain!) they left the house clean, having used dust sheets everywhere and vacuumed once the job was done. The new windows look fantastic and the finish is impeccable. Highly recommended for anyone looking for a stress-free experience.

Sayuri Holman

22:52 10 Feb 26

We are very happy with our new doors. Everything was smooth and easy, with great communication throughout the process, and the installation only took a few hours. They also cleaned up and took away the old doors, which was nice and one less thing to worry about. Would definitely recommend this local business!

Beth Pape

20:28 04 Feb 26

Absolutely chuffed with our new front door from Spectrum. It has made such a huge difference to our entrance way, and no draft at all on the inside. The whole process was smooth and easy and the new door was installed within 6 weeks of ordering, even with the Christmas period. Such good value for money as well with the quality and experience. Would highly recommend.

Andy Harvey

11:23 01 Dec 25

Spectrum recently replaced all the windows in my house and built a Hup extension to the property. They have been entirely excellent throughout, with all work carried out on schedule, on budget and to an excellent standard. I would definitely use them again, and have no hesitation in giving them my strongest recommendation.

Gav Cheal

18:31 27 Mar 24

Firstly, I cannot praise Spectrum Glazing Limited enough for the quality and attention to detail of the fitters tasked with our installation. They went above and beyond my expectations. They were polite, tidy and efficient and did the perfect job.
The product as you can see from the images, look amazing and really enhance our kitchen. The door flow easily when opening and closing, the handles make this operation simple and the locking is also simple.
The lead time for the product was also much shorter than other companies had quoted.
I am very pleased with the doors and would recommend them and the service that I received. An excellent product, and a happy customer.

Double Glazing in Colchester & Essex

Windows, Doors & Conservatories installed by local Experts.

your trusted local experts in windows, doors & conservatories

Free Double Glazing Quotations

Explore Our Double Glazing Product Range

how much does double glazing cost in Essex?