LS400
GREFET LS400 is a high-performance sliding door and window system built for large openings and heavy glass panels. Made from virgin alloy 6063-T6, it supports sash weights up to 400 kg while maintaining smooth, controlled movement. The 25 mm central interlocking and multi-locking mechanism ensure strength, stability, and security.
Available in 2-track and 3-track configurations, the system supports 18 to 40 mm glazing for improved acoustic and thermal performance. Tested for air, water, and wind resistance, LS400 is designed for modern residential and commercial spaces where scale, durability, and precision matter.
- Maximum glass view
- Central interlocking 25 mm
- Multi locking mechanism
- Reinforced interlocking options
- Alloy grade
6063 – T6
- Glazing
18 & 40 mm glass
- Possible Typology – 2, 3, 4, 6 sashes
Possibilities – 2 track & 3 track
- Sections
Frame: 2 track 155 mm
3 track 235 mm
Frame depth: 35 mm
- Profile thickness – 1.5 to 5 mm
- Sash 55 mm
- Maximum weight per leaf 400 Kg
- Central interlocking 25 mm
- Permittable dimensions per leaf (W X H)
1800mm X 3660mm
- Transmittance
Uw from 2.9 (W/m2k)*
*Please consult typology, dimensions & glass
- Maximum acoustic insulation
Rw = 42 dB
- Air permeability
Test BS EN 1026: 2016 (Class 4)
- Water tightness
Test BS EN 1027: 2016 (PA 300, Classification 7A)
- Wind resistance
As per BS EN 12211 (3.75 kPA, Class C)
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