APX47 Sliding.
Patio Door System
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The workhorse patio door.
Cortizo Cor 4700 is the mid‑range patio door for projects where budget matters as much as performance. It offers genuinely generous panel sizes (up to 3m tall, 2.5m wide), a slim 50mm interlock, and the choice between inline and lift‑and‑slide operation — the latter being worth the upgrade for anything over 200kg.
It is the door we recommend when you want the look and performance of Cortizo’s premium systems at a price that makes sense for a standard rear extension. Most of our residential projects in Wembley, Harrow, and North London specify this as standard.
Lift. Slide. Effortless.
On a standard inline sliding door, the weight of the glass rests on the rollers the whole time — so anything above 200kg becomes physically hard to move. The lift‑and‑slide variant uses a geared handle that raises the panel a few millimetres off the track when you open it, and lowers it back into a compression seal when you close.
The benefit: a 300kg panel glides effortlessly with one finger. The compression seal also makes the door measurably warmer and quieter when closed. Strongly recommended for any door over 2.5m tall.
Specifications
Cortizo Cor 4700 sliding system. Frame depths: 115/120mm (double track), 185mm (triple). 50mm sash interlock. Glass‑fibre polyamide thermal strip 20–25mm. Profile wall thickness 26–36mm. Stainless steel tandem roller system rated to 300kg per leaf. Glazing capacity 22–65mm. Certified Class 3/4 air permeability, 7A water tightness, C5/C2 wind resistance.
Single track, double, triple, or four‑track. Inline or lift‑and‑slide (lift‑slide recommended over 200kg panel weight). Pocket system available for panels sliding fully into wall cavity. Low‑threshold option for level access compliance.
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.
