Can you replace just the glass in a sliding door?

When the glass in a sliding door breaks, most people assume the whole door is gone. It normally is not. A sliding door is an aluminium frame holding a single pane, and on almost every door built in the last few decades that pane can be taken out and a new one fitted into the same frame, running on the same track. A new door is only the answer when the frame itself is bent, corroded or badly out of square. So in most homes this is a glass job, not a door job — which is also why sliding door glass replacement is a service in its own right.

Work out what actually broke

Three different things go wrong with sliding doors, and they are not the same repair. Knowing which one you have tells you who to call and what to ask for.

1. The glass. Shattered, cracked from edge to edge, or chipped where it sits in the frame. This is the straightforward one: new glass in the existing panel.
2. The rollers or the track. The door drags, jumps off line, or will not stay shut, but the glass is sound. That is a hardware repair rather than a glazing job.
3. The frame. A corner has pulled apart, the locking stile is bent after a break-in, or the aluminium has corroded. If the frame cannot be squared up and sealed properly, new glass in it will not last.

If you are not sure, photograph the whole door plus the bottom corner and the edge of the glass — that is usually enough for a glazier to tell you which of the three you have.

How it broke tells you what glass you had

Sliding door glass is safety glass, and it comes in two kinds that fail in completely different ways. Toughened glass lets go all at once and empties itself onto the floor as a pile of small blunt pieces. Laminated glass has a plastic interlayer bonded between two sheets, so it cracks but stays in the opening instead of falling out. Either way the replacement goes back in as safety glass — what was in the frame before does not change what is allowed to go back in.

What the rules say about glass in a door

Doors are where the glazing standards are strictest, because people walk into them. The National Construction Code Housing Provisions require that glass in doors must be Grade A safety glazing material, and the same part also covers the fixed panels beside a door and glass that could be mistaken for an open doorway. That is why no glazier will put ordinary annealed glass back into a sliding door. We install safety glass that meets AS/NZS 2208 and glaze to AS 1288, and a glazier can confirm what the standard requires for your particular door. If you want the longer version, we have written it up in does my window need safety glass.

How a sliding door is re-glazed

1. The opening is made safe. Loose glass is taken out of the frame, the broken pieces are cleared away, and the opening is covered or boarded so the house is secure and weatherproof until the new glass is in.
2. The panel is measured. The glazier measures the sliding panel itself, not the doorway: the glass size, the thickness, and whether the glass is clear, obscure or tinted.
3. The glass is made to that size. Toughened glass cannot be trimmed once it has been made, so the measure has to be right the first time.
4. The panel comes out. On most doors the sliding panel lifts out of the track; a fixed panel usually means taking off a glazing bead or a stile.
5. The old glass and rubbers are stripped out. The frame is cleaned back so the new pane sits on fresh glazing rubber or sealant, not on twenty years of grit.
6. The new glass goes in and the door is refitted. The panel is checked for square so it slides and locks properly instead of binding on one corner.

When a new door really is the better answer

Sometimes new glass is good money after a bad frame. It is worth asking about a new panel or a new door when:

• the frame corners have opened up, or the aluminium is bent or corroded
• the door has been forced and the locking stile is damaged
• the glass sits in a timber frame that has rotted out at the sill
• the door never slid properly even before the glass broke

A measure and quote settles it before you spend anything, and it is free within our service area.

What drives the price

Four things move the number on a sliding door: the pane, the access, the frame and whether the opening has to be made safe first. A big door panel in a thicker toughened glass costs more than a small one. Obscure, tinted or laminated glass costs more than plain clear toughened. A door on an upstairs balcony or down a narrow side path takes more handling than one off a back patio. And if the frame needs work before the glass can be bedded in properly, that is part of the job too. We do not quote from a guess: we give a written quote after a free measure, and the written quote is the price you pay. If someone else is paying, our write-up on claiming a broken window on insurance covers what an insurer usually wants to see.

Common questions

Can a cracked sliding door be repaired instead of replaced?

No. A crack in toughened or laminated glass cannot be filled, patched or stopped. Once it is cracked edge to edge it has to come out. The frame, the rollers and the lock are all re-used, so the repair is still a lot smaller than a new door.

Does the whole door have to come off?

The glass panel does, but the frame built into the wall normally stays where it is. On a standard aluminium slider the moving panel lifts out of the track and goes back in the same way. A fixed panel takes a bit more work because the beads or a stile have to come off, but the opening itself is not touched.

Can I get obscure or tinted glass in a sliding door?

Yes — obscure (frosted) and tinted glass are both made in toughened safety grades, so a door that faces a neighbour, a street or a bathroom can be replaced with something you cannot see straight through. It is worth raising at the measure, because the glass has to be ordered that way; it is not something that can be changed afterwards.

Is the glass in a stacker or a cavity slider different?

The glass is the same safety glass, but the panels are held in differently and some have to be lifted out in a particular order. Tell your glazier what kind of door it is when you book.

Need the glass replaced in a sliding door?

All Purpose Glass is a family-owned glazier working from our own workshop in Minchinbury since 1992. We measure, make and install replacement glass across Western Sydney, including Blacktown and the rest of the Blacktown, Parramatta, Penrith and Fairfield areas, and we make broken openings safe. The measure and quote are free within our service area, and the written quote is the price you pay.

Get a free quote Call (02) 9832 1566