Frameless Doors — Patch Fitted and Automatic Sliding

What we deliver

Patch-fitted frameless glass doors and automatic sliding doors for entrances, lobbies, showrooms and internal glazed partitions — supplied, installed and set up as part of the facade and fenestration package.

Frameless doors carry a lot of weight on very little hardware. The glass is a single toughened panel, the patches are its only structure, and everything about whether the door still works in five years is decided by the floor spring pocket and the accuracy of the installation.

Scope of works

Stage	What we deliver
Selection	Door type, hardware set, operation, fire strategy alignment
Design	Glass thickness, patch and cut-out positions, floor spring pocket
Coordination	Pocket setting-out issued to civil before slab finishing
Fabrication	Cut-outs formed pre-toughening, glass toughened
Installation	Spring setting, patch fitting, alignment, closing speed
Handover	Operation check, adjustment, warranty documentation

What drives the cost

Manual patch-fitted versus automatic sliding · door size and glass weight · hardware grade and origin · floor spring specification · sensor and controller package on automatic doors · break-out requirement on escape routes · finish on patches and rails.

Where projects go wrong

• Hardware chosen after the glass is ordered. Cut-outs are made before toughening. Late hardware changes mean new glass.
• Floor spring pocket formed badly. The single most common cause of doors that sag, bind or stop self-closing.
• Automatic doors specified without the fire strategy. Escape route doors need defined fail-safe behaviour on alarm and power loss.
• Ignoring alignment tolerance. Frameless doors have no frame to hide a gap. Adjacent panels and the floor must be set out to match.
• Under-specified closing control. A heavy glass leaf closing too fast is a safety issue in a public lobby.

Why Hagerstone

Coordinated with the facade, not bolted on afterwards. Entrance doors sit at the junction of the glazing, the flooring and the fire strategy — we detail all three rather than arriving after the opening is built.

100% in-house execution with a dedicated 20-member facade team, under ISO 9001 / 14001 / 45001 certification and 79+ quality checkpoints.

Standards referenced

Architectural safety glass under IS 2553 (Part 1) — toughened, with cut-outs formed before toughening. Means of egress, door width and automatic door behaviour on escape routes under NBC 2016, Part 4.