A finished ADP rear extension at dusk, wide glazing across the back of the house
Supply and fit · London

Made to
the opening.

Hand-welded steel Crittall-style doors, slim sliding aluminium and windows. Surveyed, supplied and fitted by one London team.

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5.0/5

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13yrs
In windows and doorsAngelo since 2013, ADP Windows Ltd since 2019
1team
One team from survey to fittingNo subcontractors
100yrs
Built to lastDesign life of a hand-welded steel frame
Hand-welded steel Crittall-style screen under a vaulted roof
01 · Steel
Slim sightlines

More glass.
Less frame.

Hand-welded steel from a 20mm sightline, made to the millimetre of your opening.

02Why steel

Welded, not assembled.

Hot-rolled steel, welded by hand and made to your opening. The welds are ground back until the frame reads as one continuous line. No hairline joints, nothing to open up at the corners.

StiffnessAround three times stiffer than aluminium. That is what keeps a slim sightline straight for decades.
Made to orderNo catalogue sizes. Every door is measured at survey and made for one opening.
SecurityPAS24 tested options available.
03Drawn, then welded

Every door starts as a line.

  1. 01Outer frame, set to the surveyed openingDONE
  2. 02Door leaves and sidelightsDONE
  3. 03Glazing bars, placed by handDONE
  4. 04Welded joints, ground backDONE
  5. 05Handles and hingesDONE
  6. 06Glazing inDONE
DRAWING0%
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04The range

Choose your opening.

Steel, aluminium, timber and uPVC. Eight families, one standard of fit.

01Steel doors

Crittall-style steel doors

Hand-welded · internal and external · fire-rated

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02Slim sliding

Slim sliding aluminium

Cortizo COR Vision · 20mm interlock

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03Aluminium doors

Aluminium doors

Bifold · sliding · French · front

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04Aluminium windows

Aluminium windows

Casement · tilt and turn · Heritage 47

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05Timber windows

Timber windows

Casement · sash · tilt and turn

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06Timber doors

Timber doors

French doors

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07uPVC

uPVC windows and doors

Casement · flush · sash · patio sliding

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08VELFAC

VELFAC

Composite windows and doors

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05What we are known for

Three lines, built properly.

SteelInternal and external

Crittall-style steel doors

Hot-rolled steel, hand-welded and ground back to one frame. Internal and external, made to your opening.

  • SightlineFrom 20mm
  • PriceFrom £1,999 +VAT, supplied and fitted
  • SecurityPAS24 tested options available
  • Guarantee10-year written
Explore steel doors
AluminiumMost chosen

Slim sliding aluminium

A garden wall of glass with a quiet frame. Large panes, a flush threshold you walk straight over.

  • SystemCortizo COR Vision
  • Interlock20mm
  • ThermalUw from 1.3 W/m²K
  • PanelUp to ~2500 × 3000mm
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Doors and windowsWhole house

Everything else, fitted the same way

Front doors, bifolds and French doors. Casement, sash and tilt-and-turn windows. Different materials, one team, one standard of fit.

  • MaterialsAluminium, timber, uPVC, VELFAC composite
  • DoorsBifold · sliding · French · front
  • WindowsCasement · sash · tilt and turn · Heritage 47
See the full range
06Portfolio

Finished,
not staged.

Every one of these was surveyed, supplied and fitted by our own team.

See our portfolio
Charcoal House, Bromley: dark rendered rear extension with full-width glazing
FEATURED
Case study · Bromley BR7Charcoal House
Charcoal HouseBromley, BR7
Panoramic House, Esher: glazed garden room
Case study · Esher, SurreyPanoramic House
Panoramic HouseEsher, Surrey
The Barn Bathroom, Richmond: steel sliding door in a dark interior
Case study · Richmond, LondonThe Barn Bathroom
The Barn BathroomRichmond, London
The Sash Kitchen, Hampstead: white kitchen with sash windows
Case study · Hampstead, NW3The Sash Kitchen
The Sash KitchenHampstead, NW3
The Garden Kitchen, Edgware: kitchen extension opening to the garden
Case study · Edgware, LondonThe Garden Kitchen
The Garden KitchenEdgware, London
The Sun Terrace, Harrow: bifold doors onto a terrace
Case study · Harrow, LondonThe Sun Terrace
The Sun TerraceHarrow, London
More being written up

Six projects in full.
More to follow.

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07Supply and fit

One team from the opening to the finished room.

Most jobs go wrong in the gap between the supplier and the fitter. We hold both, so there is one number to call if anything needs putting right.

Slim sliding doors over a walk-on glass floor
01 · SURVEY

We survey and set out

We measure the opening before anything is ordered, and set the frame to the glazing, not the other way round.

Building Control compliant
Steel Crittall-style doors under a gable
02 · RENDER

You see it first

A render of the finished result before you commit, so you decide on your room, not on a brochure page.

Before you commit
Steel internal door in a dark hallway
03 · ORDER

Made to order for your opening

Steel doors and aluminium systems built to the surveyed size, confirmed at survey.

No catalogue sizes
Kitchen extension opening fully to the garden
04 · FIT

We fit it ourselves

Our own fitters install it, so nothing gets lost between a supplier and a separate crew.

One team, start to finish

Building for a client? One supply and fit team for your timeline.

Trade and builder enquiries
08Start here

Start with a conversation.

  • A render of the finished result before you commit
  • Showroom in Ruislip, opposite Ruislip Manor station, with parking
  • One team from survey through to installation
Prefer to talk?+44 20 3375 8609Not ready for prices? Send us a message instead