ADP Windows Ltd

ADP Windows Ltd Window supplier in London, England...

Take the post out of a corner and the roof above it still has to be carried by something.That something is a cantilever,...
02/09/2026

Take the post out of a corner and the roof above it still has to be carried by something.

That something is a cantilever, built from a frame of steel beams tying the walls together, which makes it a structural decision rather than a glazing one.

A beam over a room is normally designed to Span/360, but doors that fold and roll need Span/500 or 5 mm, whichever is smaller.

Five millimetres of drop is enough to pinch the tracks, stop the locks reaching their keeps and leave the seals on a corner never meeting at all.

The beam also has to land on concrete padstones, because brickwork on its own is usually too soft to take the load at the bearings.

Even then the panel has its own physics, because a triple-glazed leaf can weigh over 100 kg and only stays square once the fitter packs it and lets the glass work as a brace.

We do not calculate your structure.

We tell you the tolerance your engineer has to hold, so the corner you drew is the corner you get.

Save this before your structural drawings are signed off.

Planning a rear extension with an open corner?

Book a free consultation 👇

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bifold doors • open corner bifold • cantilever roof • beam deflection • padstones • rear extension • structural opening • aluminium bifolds • toe and heeling • London renovation

Part two in Edgware, and this set does the walk that catches most projects out: from the terrace round to the front door...
28/08/2026

Part two in Edgware, and this set does the walk that catches most projects out: from the terrace round to the front door.

At the back the wall opens twice, and both openings are bifolds.

One runs the full width of the living room, with the panels stacked out of the way against the brick.

The other reaches the kitchen and folds back around the corner, so there is nothing left standing in the corner at all.

Step back and the elevation is glazed on three levels: the two openings, the slim letterbox windows set into the brickwork, and the dormer at the top.

From directly above you see the part nobody photographs, a large flat rooflight with a smaller one beside it and a fully glazed roof over the extension below.

Then you walk round to the front, and nothing changes: same aluminium, same frame colour, same detailing, down to the glazed panels either side of the front door and the roof windows in the tiles.

Every opening in this house came from one glazing team on design, supply and installation, which is why the front and the back read as one project.

Building work by jk_design_and_build, glazing throughout by us.

Planning a project where the glazing has to work at the front as well as the back? Book a free consultation 👇

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bifold doors • aluminium glazing • corner bifold • flat rooflight • glazed roof • rear extension • front door glazing • roof windows • Edgware London • supply and fit

Glass in one wall only gets you so far into a deep extension.This project in Edgware is glazed on more than one plane.Th...
20/08/2026

Glass in one wall only gets you so far into a deep extension.

This project in Edgware is glazed on more than one plane.

The garden wall slides fully back and the same stone carries straight on outside.

There is also a lantern in the roof and a flat rooflight further along, so the depth of the plan never sits in shadow.

In the kitchen the window folds out over the worktop and turns the sink run into a serving hatch onto the terrace.

None of that works when three different suppliers are guessing at each other’s tolerances.

Every piece of glazing in this house is ours, from the sliding wall to the roof lights, with one team on design, supply and installation.

The last frame is a hint at part two.

Planning a rear extension and wondering how much glass it can actually take? Book a free consultation 👇

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slim sliding doors • glazed garden wall • rear extension • roof lantern • flat rooflight • natural light • indoor outdoor living • Edgware London • supply and fit • bespoke glazing

A second room should not cost you the light in the first one.A stud wall here would have given the bedroom its privacy a...
13/08/2026

A second room should not cost you the light in the first one.

A stud wall here would have given the bedroom its privacy and taken the daylight off everything behind it.

Instead the divide is a floor to ceiling glazed screen, made to the opening rather than to a catalogue size.

Clear panes keep the light moving through the flat, and satin glass sits where the bed needs cover.

The two sliding panels close the room off at night and take up no floor space when they are open.

The frame was finished in a soft light shade rather than the usual black, so it sits with the plaster and the oak instead of cutting across them.

One team from the first survey to the final fit, so nothing is left to guesswork on site.

Thinking about splitting a room without losing the light?

Book a free consultation and we will tell you what your space can take.

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crittall style doors • glazed partition • internal glazing • room divider • sliding glass doors • satin glass • bedroom divider • open plan flat • made to measure • london renovation

In a Conservation Area, a plastic window on the front elevation is refused almost as a matter of routine, and timber, de...
06/08/2026

In a Conservation Area, a plastic window on the front elevation is refused almost as a matter of routine, and timber, detailed properly, is what gets signed off.

Where an Article 4 Direction applies, permitted development rights are gone and your replacement has to go past a planning officer before anything is fitted.

Plastic tends to fail on three visual points: the frame reads too thick, the surface too glossy, and the profile sits too flat against a period elevation.

Timber passes when the detail is right, with glazing bars often under 18 mm, sash horns reinstated and the external profile matched to the original.

Performance is not the trade-off people expect, because vacuum glazing is around 8 mm thick and fits a slim historic sash where a modern sealed unit will not.

At the rear the rules usually loosen, and on an interwar house that originally had slim steel windows, Heritage 47 steel-look aluminium is often accepted.

What decides more applications than any of it is what you put on paper.

A heritage statement and section drawings at 1:5 show the officer exactly what they are being asked to approve.

Save this before you speak to your council.

Book a free consultation and we will spec the windows to suit your elevation.

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conservation area windows • timber windows • sash windows • like for like replacement • Article 4 direction • planning permission • listed building • glazing bars • heritage statement • period property

A loft landing with a gable ceiling is where most suppliers stop and offer you a square opening.The usual answer is a st...
30/07/2026

A loft landing with a gable ceiling is where most suppliers stop and offer you a square opening.

The usual answer is a standard frame with a boxed panel filling the triangle above it.

You lose the height, and the shape of the roof disappears behind plasterboard.

Here the frame was made to the exact angle of the apex instead.

Three bays, full height glass, and one leaf that opens in the middle.

Open or closed, the beams read as one line from the landing into the room behind.

That is what bespoke actually means. The opening decides the shape, not a catalogue size.

Got an awkward opening in your loft?
Book a free consultation and we will tell you what is possible.

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crittall style doors • loft conversion • gable partition • apex glazing • bespoke internal doors • slim black frames • made to measure • london renovation • internal glass wall • supply and fit

Anthracite slim sliding doors. Rear extension. 20mm frame. 🏡The garden looks like it’s already inside, and the doors are...
23/07/2026

Anthracite slim sliding doors. Rear extension. 20mm frame. 🏡

The garden looks like it’s already inside, and the doors are closed.

That’s the point of a 20mm interlock: the frame almost disappears, so the view doesn’t stop at the glass. You get the garden in the room, not a window onto it.

Most rear extensions end up with a door that reminds you there’s a boundary. This one removes it.

Book a free consultation, by phone or in person at our London showroom: 28 Victoria Road, Ruislip, HA4 0AB 🏡

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slim sliding doors • glazed garden wall • anthracite sliding doors • slim-frame aluminium doors • indoor-outdoor living • rear extension London • garden room • floor-to-ceiling glass • London showroom • 20mm slim frame

Your brand new sliding doors sweat every morning, and it is almost never the doors that are at fault.Here is what is rea...
16/07/2026

Your brand new sliding doors sweat every morning, and it is almost never the doors that are at fault.

Here is what is really happening. Aluminium is a brilliant heat conductor, so the frame edge runs cold.

Warm, humid air from inside your home meets that chilled edge and condenses into water.

Those droplets are not a leak.

They are moisture from your own rooms settling on the coldest surface.

It is worst in the first two years, while fresh plaster and screed dry out and release litres of water.

A basic glazed unit with an aluminium spacer bar makes it almost certain.

Two things fix it, and neither is a new door:
- A warm-edge spacer, which keeps the glass perimeter closer to room temperature.
- A ventilation plan, so trickle vents and an extractor pull the damp air out before it reaches the glass.

Get both right at the quote stage and the morning damp never starts.

📌 Save this for your project. Book a free consultation and we will spec the glass and airflow for your room.



slim sliding doors, condensation, warm-edge spacer, trickle vents, aluminium frame, double glazing, home extension, London renovation, ventilation, moisture control

Standard doors don't fit sloped ceilings. This is what millimetre-perfect problem-solving looks like.Awkward architectur...
10/07/2026

Standard doors don't fit sloped ceilings. This is what millimetre-perfect problem-solving looks like.

Awkward architectural spaces are where bespoke craftsmanship truly shines.

Our solution was to create a custom asymmetrical transom that mirrors the exact slope of the ceiling.

The exposed sliding mechanism not only saves crucial floor space but also adds a touch of industrial character, proving that even the most challenging layouts can become functional and beautiful.

Have an architectural challenge in your home? Tell us about it. 👇

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sloped ceiling door • asymmetrical design • bespoke steel doors • exposed sliding track • industrial style • space saving door • custom fit transom • architectural problem solving • powder coated steel • made to measure

08/07/2026

Design your door before you commit to anything.

Our partner The Residence Collection has a free online designer where you can choose the style, glass, colour and finish of your timber door before a single measurement is taken.

See what it looks like. Then come to us to make it happen.

ADP Windows supplies and fits The Residence Collection across London. One team, from your first design to the final installation.

👉 Design yours: residencedoordesigner.co.uk 📍 Or visit us in person: 28 Victoria Road, Ruislip, HA4 0AB



timber doors London • wooden front doors • bespoke timber doors • Residence Collection • door designer • supply and fit London • front door ideas • London showroom • traditional doors London • bespoke doors London

Address

28b Victoria Road, Ruislip
London
HA40AB

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm
Saturday 9am - 12pm

Telephone

+447450954664

Website

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