Shower Glass Door Repair: Hinges, Seals and Replacement Panels
Most shower door problems (a door that sags, drags or leaks) come from worn hinges, sweeps or seals, and these parts can be replaced if they match your glass thickness and hole pattern. You rarely need a whole new enclosure. If a tempered panel is chipped, cracked or etched, only that panel is replaced with a new safety-glass panel made to measure, which typically takes one to two weeks to fabricate.
Hinge sag is the most common frameless shower door problem. Zinc-alloy hinges often fail in 5–10 years, while solid brass or 316 stainless hinges typically last 15–25 years.
Bottom sweeps usually last 3–5 years. Hard water, cleaning products and daily use wear them out, and Toronto's tap water averages 121 mg/L hardness.
Tempered glass can't be cut or drilled after tempering, so replacement hinges must fit your existing holes and a new panel must be made to measure.
Ontario's Building Code allows only safety glass in shower and bathtub enclosures. A replacement panel must be tempered or laminated.
Replacing just a frameless door with hardware runs about $700–$2,000 in published GTA ranges. A whole new frameless door and fixed panel runs $1,300–$2,300, which is what fixing the part that failed avoids.
On this page
Most shower door problems aren't glass problems. When a door drags, drips or won't close properly, the cause is usually a sagging hinge, a worn sweep or a failed seal. Those parts can be replaced in one visit, as long as the new ones match your glass, and the rest of the enclosure stays. The glass itself can't be repaired. Tempered glass can't be cut, drilled or patched after it's made, so a chipped, cracked or shattered panel is replaced on its own with a new one made to measure. The other panels, the hardware that's still sound and the layout stay as they are.
This guide covers how to work out what's wrong, what each fix involves, what Ontario requires of replacement glass and what GTA homeowners are paying in 2026.
What's wrong with your shower door?
Start with the symptom. Most of them point to a specific part.
| What you notice | Likely cause | Usual fix |
|---|---|---|
| Door has dropped at the handle side, rubs the curb or won't swing shut | Hinge sag, the most common frameless problem | Replace the hinge pair, matched to your glass |
| Grinding, lost self-closing action or corrosion on the hinges | Worn springs or bushings inside the hinge | Replace the hinges |
| Water on the floor below the door | Worn bottom sweep or drip rail | New sweep in the right profile and size |
| Water escaping along the vertical gap | Worn side seal (flat fin, bulb or H-profile) | New side seal |
| Leak at the bottom corners | Failed caulking | Strip it and re-seal with 100% silicone |
| Chip or crack at a hinge hole or edge | Edge damage, which can't be repaired | Replace the panel soon |
| Cloudy glass that won't come clean | Mineral deposits or permanent etching | See our hard water guide |
| Glass has shattered | Edge damage or, rarely, a nickel sulfide inclusion | See why shower glass shatters |
Hinges: the part that fails most
The three types
Wall-mount clamp hinges, which anchor into the wall, are the most common. Glass-to-glass hinges join two panels at 90°, 135° or 180°. Pivot hinges let the door rotate on a vertical axis and are normally a professional install.
Why doors sag
The hinge material matters most. Solid brass and 316 stainless steel hinges typically last 15–25 years in home use, while zinc-alloy hinges usually fail in 5–10 years. Weight is the other factor. Frameless panels weigh roughly 60–110 lb, and quality hinges carry a rating, often 60 or 90 lb per pair. A heavy door on under-rated hinges will sag early.
Adjust or replace?
If the door has only drifted, re-levelling it can help. But once the springs or bushings inside the hinge are worn, adjusting the door without replacing the hinge will only buy a few months.
Matching a replacement hinge
Three things must match: glass thickness, the centre-to-centre spacing of the holes, and the weight rating. A 3/8 in gasket on 1/4 in glass lets the panel shift, and a 1/4 in gasket on 3/8 in glass won't seat at all. Tempered glass can't be drilled in the field, so the new hinge has to fit the holes you already have.
Good hinges and clamps use gaskets and bushings so metal never touches glass directly. Look closely when you replace hinges. A missing or crushed gasket puts metal against the edge of a hole, and that is a common starting point for breakage.
Safety note: don't take a frameless door off its hinges alone. At that weight it takes two people, and a dropped panel that strikes a tile edge can shatter.
Sweeps, seals and caulking
Leaks usually come from worn sweeps and seals, not from the glass. The five usual leak paths are under the door, along the side edges, at the hinges or pivot, at the bottom corners, and over the top of the enclosure.
- Bottom sweep: a clear vinyl or polycarbonate strip along the bottom edge, with a flexible fin or a drip rail.
- Side seals: vertical strips between the door and the fixed panel, in flat fin, bulb or H profiles.
- Corners: 100% silicone sealant where the glass meets the curb and wall.
Most sweeps last 3–5 years, depending on water hardness, cleaning products and use. Hardness matters here. The City of Toronto's own 2024 testing puts average tap-water hardness at 121 mg/L as calcium carbonate, and that scale stiffens vinyl and dulls glass.
Sweeps and seals are sized to the glass. Measure the thickness first: framed doors usually use 3/16 in or 1/4 in glass, and frameless doors 3/8 in or 1/2 in. Replacing a sweep is a reasonable DIY job. Rehanging a heavy frameless door is not.
When one panel has to be replaced
A chip can't be repaired, and neither can a crack or deep etching. Tempered glass cannot be cut or drilled after it is made. That means a replacement panel is fabricated from your measurements, with every hole and notch placed before the glass is tempered.
What the rules require
Ontario's Building Code says glass other than safety glass shall not be used for a shower or bathtub enclosure; confirm the wording against the current 2024 code. Federally, shower and bathtub doors and enclosures fall under the Glass Doors and Enclosures Regulations, which call for tempered, laminated or wired safety glass meeting the CGSB standards. In practice, your new panel will be tempered or laminated, and it should carry a permanent safety-glass mark. For how the two types differ, see tempered vs laminated glass.
Thickness
| Thickness | Typical use |
|---|---|
| 3/16 in or 1/4 in (about 6 mm) | Framed doors |
| 3/8 in (10 mm) | The standard for frameless doors |
| 1/2 in (12 mm) | Premium, larger panels; needs heavier hinges |
Keep the same thickness unless you're replacing the hardware too. Going thicker adds weight, and your existing hinges may not be rated for it.
Lead time
Expect roughly 7–14 business days for fabrication from the final measure, and 2–4 weeks for the whole project. If the door has shattered, plan on using another shower in the meantime.
What it costs in the GTA (2026)
These are GTA market ranges, not quotes. Your price depends on size, thickness, hardware finish and access. Start with the repair that fixes the part that failed.
| Repair-first job | Typical GTA range (CAD) |
|---|---|
| Replacement frameless door with hardware | $700–$2,000 |
| Frameless glass by area | about $40/ft² (10 mm), $50/ft² (12 mm); $850 minimum job |
For comparison, this is what a whole new enclosure costs, which is what you avoid when the fix is a hinge, a seal or one panel:
| Whole new enclosure (for comparison) | Typical GTA range (CAD) |
|---|---|
| Framed sliding door, 6 mm, installed | $450–$750 |
| Semi-frameless door | $650–$1,050 |
| Frameless door, 10 mm | $900–$1,600 |
| Frameless door and fixed panel | $1,300–$2,300 |
Thickness is a big cost driver. Expect 10 mm glass to run 60–90% more than 6 mm, and 12 mm 30–40% more than 10 mm, with protective coatings adding $50–$300.
Repair or replace: a quick rule
- Repair the hardware (the default) when the glass has no chips or cracks, the holes are clean and the hinges are a standard pattern that can be matched.
- Replace just the damaged panel when there's any chip or crack, especially at a hole or edge, or when etching has made the glass permanently cloudy. The rest of the enclosure stays.
- A whole new enclosure is the exception: only when you want a different thickness or layout, or when the frame of an old framed unit is corroded beyond saving. That's a remodel rather than a repair, and we'll tell you plainly if that's where you are.
When to call a pro
Call a glazier if the door is heavy frameless glass, if a hinge has pulled out of the wall, if there's any chip at a hole, or if the leak persists after a new sweep. On a visit we check every hole and edge for chips, the hinge material and sag, the gaskets, the sweep and seals, and whether the wall is plumb. Then we quote the repair first: hardware only if the glass is sound, or a single new panel made to your existing hole pattern if it isn't. The same visit can also cover a custom mirror for the bathroom.
Next step
If your shower door is sagging, leaking or damaged, see our shower glass repair service for what we fix and how we measure for new panels. Send us a photo of the hinge and the glass edge through our contact page for a free quote.