Structural Glazing Repairs for Frameless Glass and Glass Doors

Structural and frameless glazing uses large panes with little or no visible frame: glass box extensions, frameless corner windows, glass balustrade-style panels on homes and all-glass shop entrances. When a unit cracks, mists or a silicone joint fails, it's very visible. Mark repairs existing structural and frameless glazing for homes and shops, replacing damaged units, renewing failed silicone joints and fixing the hardware on frameless glass doors. We repair what is already there; we don't design or install new glass structures.

Replacing a large frameless unit is a planned job. The new unit has to match the original's size, glass make-up and edge detail, so the details are taken from the existing unit and its specification where available. The opening is made safe in the meantime. If a pane has cracked and could fall, it's taped or boarded first, subject to availability.

Misting in a frameless unit means the same thing as in any sealed unit: the edge seal has failed and moisture has got between the panes. In frameless glazing the edge of the unit is often exposed or hidden only by a silicone joint, so a failing joint can let water reach the seal and shorten its life. The misted unit is replaced, and the joints around it renewed so the new one is protected.

Silicone joints are what hold the weather out between panes that meet glass to glass. Over time they can pull away, split, discolour or go mouldy. A failed joint is cut out completely, the glass edges cleaned, and new silicone of the right type applied and tooled. Done properly this stops leaks and draughts and tidies up the look of the glazing.

Frameless glass doors on homes and shopfronts rely on patch fittings, pivots, handles and locks fixed directly to the glass. When these loosen or wear, the door drops, drags or won't lock. Worn fittings are replaced and the door reset. For shop entrances with floor springs and closers, see our shopfront door repairs page, and for general shopfront glass, our shopfront glazing page. For ordinary cracked glass, see cracked glass replacement.

Because frameless glazing is so visible, a good repair is one you can't spot afterwards. Joints are matched in colour and width to the existing ones, and replacement units are made to line up with their neighbours. Mark will look at photos first and explain what's involved before arranging a visit. Work is carried out across Central London and out to the M25, with a fixed price confirmed before any work starts.

How the repair works

  1. 1. Photos and details Send photos of the damaged glass or joint and any details you have of the original glazing.
  2. 2. Fixed price Mark confirms what can be done and gives a fixed price before anything is ordered.
  3. 3. Repair The unit replaced, joints renewed or door hardware fixed, and the glazing checked.

Frequently asked questions

Can a cracked structural glazing unit be replaced?

Yes, in most cases. A matching unit is made to the original size and specification and fitted in place of the cracked one, with the opening made safe while it is being made.

Why is my frameless glass misting?

Misting between the panes means the unit's edge seal has failed. In frameless glazing a worn silicone joint can let water reach that seal. The unit is replaced and the joints around it renewed.

Do you install new glass extensions?

No. We repair existing structural and frameless glazing. New glass structures are designed and installed by specialist installers.

See also

Call Mark on 07535 916982 or request a callback.