APX20 Plus.
Ultra-Slim Sliding Door
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Slim sightlines. Triple‑track capacity.
APX20 Plus is our enhanced‑performance slim sliding door. It keeps the 25mm central sightline of a premium minimal system, but upgrades the frame engineering to carry heavier panels, accept larger spans, and offer a genuine triple‑track configuration — meaning you can stack three sashes behind each other to open two‑thirds of a wide elevation.
The photograph above is from our Cambridge Avenue install. Triple‑track APX20, 4.2m wide opening, 0.9 W/m²K whole‑door, anthracite grey outside, matching inside.
A door built for a wide opening.
Not every rear extension needs a 4m opening. But when it does, you need a door system that can actually carry the load without warping, sagging, or needing service visits every few years. APX20 Plus is rated to 400kg per panel (manual) or 700kg motorised, with stainless steel tandem rollers and a continuous threshold drainage channel.
Corner configurations (two panels sliding 90° into each other) let you open an entire corner of the building. Pocket configurations slide every panel into a hidden wall cavity. Both specified, both fitted, both in several of our London projects.
Specifications
Frame depth 180–278mm (triple track). 69mm sash depth with 25mm visible interlock. Polyamide thermal break 18–40mm. Profile wall thickness 2.0mm. Max pane 4000 × 4000mm at 400kg manual (700kg motorised). Compatible with glazing up to 54mm. 94% glazed area of total aperture. Pocket door system available.
Double and triple-track. 2 to 6 panel. Pocket sliding. 90° corner without mullion.
Colour Options
Available in Black, Anthracite Grey, and White as standard.
Different colours inside and outside — match your interior while maintaining exterior aesthetic.
200+ RAL colours. Textured, matte, or gloss finish options.
