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New-build & renovation specialists · London, Kent, Bromley, Beckenham, West Wickham & more

Big glass. Slim frames. Fitted properly.

We specialise in large-format Cortizo Cor Vision sliding doors, alongside premium aluminium and uPVC windows, rooflights and roof lanterns for new builds and major renovations. Family run, with over 35 years in the trade.

Discuss your projectExplore Cor Vision
  • Panels up to 3m tall
  • 20mm sightlines
  • Our own fitters
Three-panel Cor Vision sliding doors with black aluminium windows on the rear of a newly built brick and render house
Three-panel Cor Vision (InfiniGLIDE 3) slim sliding doors in black across a rendered rear extension, looking into an open-plan kitchen
Slim black sliding doors onto the garden, Shirley
AluK BSC94 HI sliding doors across a kitchen extension
White UniFOLD HI bifolds with integral blinds
Grey Kömmerling C70 windows, whole new build
Timberlook French doors with Legacy windows
Kömmerling Legacy windows, whole house
Cor Vision sliding doors on a new build
95%of our new work comes
from recommendations
35+years in the glazing trade
95%of new business from recommendations
3mtall Cor Vision panels, fitted by our own teams
Cor Vision sliding doors meeting at a corner with no post, opening a room fully onto a courtyard
Our speciality

Large Cor Vision sliding doors

Cor Vision is built for openings most sliding doors can't handle. Panels up to 2.5m wide and 3m tall, a centre interlock just 20mm wide, and frames that can be hidden in the floor, walls and ceiling. The result is a wall of glass that feels like nothing is there.

Panels this size need careful planning and experienced teams to install them. That's what we do best.

20mm interlockUp to 320kg panelsCorners with no postPocket options
See Cor Vision specs
Design tools

Try it before you talk to us

Design your windows

Pick styles, openers, colours and glass, see them on a photo of your house and send it to us.

Start designing

3D designer

Open, fold and slide doors in 3D. Try Crittall-style bar patterns and colours.

Open the designer

Glass & colour visualiser

See frame colours, obscure glass, solar control glass and integral blinds together.

Try the visualiser

Which door is right for me?

Five quick questions and we'll suggest the doors that suit you.

Take the quiz
Our range

Premium systems, carefully chosen

We only fit systems we trust, from Cortizo, AluK, Kömmerling, Liniar, Korniche and Ultraframe.

View out through Cor Vision sliding doors from a living room to a terrace and countryside, showing the slim interlock
Aluminium sliding doors

Sliding doors

Explore
UniFOLD HI black bifold doors folded back on both sides of a wide opening onto a lawn
Aluminium bifolds

Bifold doors

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House fitted with AluK Heritage windows, doors and a glazed extension in black
AluK Heritage & Decorio

Heritage

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AluK GT55 TB commercial double entrance doors and glazed screen in a bright school atrium
Commercial entrances

Commercial doors

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Grey AluK 58BW HI casement windows on a white rendered house
AluK & Cortizo window systems

Aluminium windows

Explore
White Liniar casements with bars on a stone cottage
Kömmerling & Liniar

uPVC windows

Explore
The same Mock Tudor house after renovation with Painswick Timberlook windows and matching beams
Timberlook & Roseview

Timber alternatives

Explore
Korniche roof lantern above a living space with bifold doors onto the garden
Rooflights, lanterns & glazed roofs

Roofs & rooflights

Explore
Who we work with

Built for new builds and renovations

Most of our work is on new builds, extensions and major renovations, where big openings and good planning make all the difference.

Homeowners renovating

Opening up the back of the house, adding an extension or replacing everything at once. We'll guide you through the options.

Self-builders

Bring us your drawings early and we'll help you get openings, thresholds and recesses right for the systems you choose.

Builders & developers

A reliable glazing partner who turns up, fits properly and leaves the site clean.

How we work on new builds

Recent installations

Fitted by our own teams

A few of our latest jobs across London, Kent, Bromley, Beckenham, West Wickham and more. Every one surveyed, made to measure and installed by Ultraglaze.

See all our work
White UniFOLD HI bifolds with integral blindsWhite UniFOLD HI bifolds with integral blindsGrey Kömmerling C70 windows, whole new buildGrey Kömmerling C70 windows, whole new buildUltraframe glass roof extension across the back of the houseUltraframe glass roof extension across the back of the houseAluK BSC94 HI sliding doors across a kitchen extensionAluK BSC94 HI sliding doors across a kitchen extensionCornerless UniFOLD HI bifoldsCornerless UniFOLD HI bifoldsKömmerling Legacy windows, whole houseKömmerling Legacy windows, whole houseRoseview Ultimate Rose bay windowsRoseview Ultimate Rose bay windowsTimberlook windows on a black-and-white houseTimberlook windows on a black-and-white house
10-yearinsurance-backed guarantee on most work
FENSAapproved installer, so no building control paperwork for you
Our own fittersno subcontractors, from survey to handover
Free surveyand a fixed, itemised quote with no obligation
From the blog

Advice for your project

White UniFOLD HI bifolds with integral blinds
Design tools

New: design your windows and doors online, on a photo of your own house

Our free designer lets you pick styles, openers, colours and glass, see them on your home, and send the design straight to us.

9 October 2026 · 2 min readRead article
AluK 58BW HI windows on a brick house, Beckenham
Projects

Project spotlight: grey aluminium windows on a Beckenham family home

How slim AluK 58BW HI casements, a corner window and matching front doors changed the look of a red-brick house.

2 October 2026 · 2 min readRead article
Kömmerling C70 window with obscure glass
Glass options

Obscure glass made simple: choosing a pattern and a privacy level

Twenty Texture by Pilkington patterns, five privacy levels. Here's how to pick the right obscure glass for a bathroom, hallway or front door.

24 September 2026 · 2 min readRead article

All articles

Reviews

What our customers say

★★★★★

Brilliant service! From the very first visit, Brin and Colin were so friendly and professional. They clearly know their craft and enjoy what they do. Their communication over WhatsApp was excellent. The sliding door they installed looks and works perfectly. I highly recommend them and will definitely use their services again!

Sinan Ö. · Sliding door · Google review
★★★★★

We had a composite front door supplied and fitted by Ultraglaze and we're over the moon with the result! From the first conversation right through to fitting, everything was smooth and stress-free. Colin and Brin are absolutely brilliant: friendly, professional, and they really go above and beyond to make sure you're happy.

Lorenc B. · Front door · Google review
★★★★★

I needed to get 5 double glazed units replaced. Brinley and Colin were incredibly helpful and were very patient with all my questions. The units were measured up, made and installed within a week. Very happy with excellent customer service.

Scott B. · Replacement glass units · Google review

4.6 ★ from 25 Google reviews · Read more reviews

Cover of the Ultraglaze complete range brochure
Free brochure

Our complete range, in one brochure

53 pages of doors, windows, heritage glazing, roofs and glass, with our own projects throughout. Download it now and browse at your own pace.

Planning a new build or renovation?

Send us your drawings or book a visit and we'll talk you through the best systems for your project.

Discuss your project