
Windows, doors & extensions across Essex · Brightlingsea showroom
Spectrum Glazing · Supplied & fitted
More daylight. Bigger garden views. Space to live.
Find the right sliding patio doors for your home with Origin, Cortizo 4700 and Smart Visoglide Plus. From replacement doors to a new extension, our team helps you choose the layout, finish and glazing, then takes care of installation.
Visit our Brightlingsea showroom · Serving Colchester and Essex

Three ranges. Your choice.
The right doors should work as well for everyday family life as they do for summer entertaining. Compare our ranges, then let us help you narrow down the specification for your opening and budget.

A clean, contemporary finish
Explore the Origin range for broad glass panels and a coordinated aluminium look. Compare the available models, handles and finishes with help from our team.
Explore Origin sliding doors →
A considered option for modern living
Explore the Cortizo 4700 for your replacement patio doors or new extension. We will help you work through the panel arrangement, glazing and frame colour.
Explore Cortizo 4700 →
Flexible design for your home
Compare Smart Visoglide Plus with the other ranges to find the right balance of appearance, opening arrangement and specification for your space.
Explore Smart Visoglide Plus →Designed around your opening
Large glass panels can make the garden feel part of your living space even when the doors are closed. Because the panels travel along a track, you do not need a swing area inside the room or a folding stack on the patio.
For a kitchen extension in Colchester, a coastal home near Clacton or a replacement patio door in Brightlingsea, we start with how you want to use the space.
Also considering bifold doors? Compare the options →Sizes, glazing, colours and performance vary by system and configuration. We confirm the specification for your project before ordering.
Room for a better view
Explore the look of broad glass panels and slim aluminium frames. These product examples show different ways sliding doors can connect your living space with the outdoors.


A clear route from idea to installation
01 · Tell us your plans
Share your postcode, approximate opening size and photos or drawings. Tell us whether you are replacing existing patio doors or planning a new opening.
02 · Compare your options
We help you compare systems and agree the panel layout, colour and glass. Your quotation sets out the proposed specification and installation scope.
03 · Survey & installation
A site survey checks the opening, access, levels and fitting requirements before manufacture. We then agree installation arrangements with you.
Before you choose
Straightforward answers to help you plan your project and compare quotations.
Ask our teamYour quotation depends on the door system, overall width and height, number of panels, glazing, colour and installation work. Send us approximate dimensions, your postcode and a photo of the opening so we can recommend suitable options and prepare a tailored price.
Sliding doors suit homeowners who prioritise large panes, garden views and an opening that does not need space for folding leaves. Bifolds are worth comparing when opening up more of the aperture is the priority. The best choice depends on your room, patio and preferred everyday access.
We can discuss two-panel, three-panel and larger layouts. Available tracks, opening directions and panel sizes depend on the chosen system. We will confirm how much of your opening is accessible with each proposed configuration.
Thermally broken aluminium frames and insulating glass help reduce heat transfer. Whole-door U-values vary with the system, dimensions and glass specification, so compare the performance of your actual proposed doors rather than a glass-only figure.
Threshold options depend on the system and site conditions. We assess internal floor levels, the external patio, drainage and exposure before recommending a detail. A flush appearance needs to be planned alongside weather protection.
Discuss black, anthracite grey, white and other available finishes with our team, including different internal and external colours where supported. We can also advise on privacy, solar control and glass options compatible with your chosen doors.
Lead times depend on the manufacturer, finish, specification and installation schedule. We will confirm the current expected timescale with your quotation and agree the next steps after the survey.
Spectrum Glazing supplies and installs aluminium sliding patio doors across Essex, including Colchester, Brightlingsea, Clacton-on-Sea, Chelmsford and Maldon. Contact us with your postcode to confirm coverage and discuss your project.
Local advice. Local installation.
Visit Spectrum Glazing at 18 High Street, Brightlingsea, Colchester, Essex, CO7 0AE to discuss your plans. Bring your dimensions, a few photos or your extension drawings and we can help you compare suitable door options. Contact us before travelling if you want to see a particular product on display.
Let’s open up the possibilities
Send your approximate width and height, installation postcode and preferred style. Not sure which range to choose? We will help you compare.
Looking for supply only? Tell us when you enquire.
Compare styles, colours and finishing ideas in our inspiration gallery, then explore the ranges that suit your home.
Browse Sliding patio doors inspiration images →