A shower door looks like the easiest purchase in a bathroom project. It is a sheet of glass and some hardware, so what could go wrong? Quite a lot. Glass is cut to size at the factory, not trimmed on site, and the door has to cooperate with your walls, your curb, your plumbing and every finish already in the room. Most regrets trace back to the same handful of mistakes, each with a simple prevention habit. Here are the ones we see most often from buyers across Canada, whether that is a condo retrofit in Vancouver, a new build on the Prairies or a century home in Halifax where the walls have not been plumb in decades.
Mistake 1: Measuring once, in one spot
This is the classic. Openings are almost never perfect rectangles. Framing settles, tile builds out unevenly, and older housing stock can lean in ways the eye barely notices. Measure the width once at handle height and order to that number, and you risk a door that fits in the middle but gapes at the top, or one that will not seat in its channel.
The prevention habit: measure the finished opening width at three heights, bottom, middle and top, and record all three numbers rather than the average. Check each wall with a level, measure the height at both sides from the top of the curb, and note the curb depth. Then confirm that the door's published adjustment range covers your smallest and largest widths with room to spare, not just barely.
| Measurement | How to take it | Why it matters |
|---|---|---|
| Width | At the bottom, middle and top of the finished opening | Out-of-plumb walls make the opening a trapezoid; glass will not bend to suit |
| Height | At both sides, from the top of the curb | Catches sloped curbs and low bulkheads before the door does |
| Plumb | A level held against each wall | Shows how much adjustment range the walls will use up |
| Curb depth | Front to back across the threshold | The track or channel needs a flat, adequate seat |
Mistake 2: Ignoring clearances and swing space
A pivot or hinged door needs an arc of empty air, and bathrooms are full of things that occupy it: the toilet, the vanity, a freestanding tub. Interior clearance matters too, since an inward swing can collide with a fold-down seat or the valve handle. Canadian codes, which vary by province and municipality, generally expect shower doors to open outward or slide, partly so a person who slips inside can still be reached. Confirm the details locally rather than assuming.
The prevention habit: tape the full swing arc on the bathroom floor and walk through it before you order. If the arc clips anything, look at a sliding style instead, remembering that sliders need a wider opening to leave a comfortable pass-through.
Mistake 3: Forgetting what is behind the wall and under the door
A glass door is heavy, and hinged models put that load into the wall for decades. At rough-in stage, that means solid blocking behind the hinge side, not just tile and drywall. If the walls are closed, your installer needs studs or the manufacturer's specified anchors. Valve and shower head placement matter too: a fixed panel in front of the valve makes servicing miserable, and a spray pattern aimed at the door seam will find every gap. Replacing the base too? Check that its threshold accepts a door and the drain location suits your layout.
The prevention habit: plan the door, the base and the shower hardware as one decision, not three. Browsing shower bases alongside the door catalogue makes conflicts obvious while they are still free to fix; brands such as Maax and Kalia design bases and doors meant to pair up.
Mistake 4: Treating finish names as standardized
Brushed nickel is not one colour. Neither is matte black or brushed gold. Every manufacturer mixes its own version, so a door frame in one brand's brushed nickel can sit beside a faucet in another brand's and quietly clash, one warm, one cool. Chrome is the most consistent finish across brands; everything else deserves a second look before you commit.
The prevention habit: where possible, keep the door hardware and visible plumbing trim in the same brand family, the way lines from Riobel or Kohler are designed to coordinate. Mixing brands? Compare finish photos side by side in similar lighting and judge the undertone, warm versus cool, not the finish name on the box.
Mistake 5: Skipping the spec sheet
The product photo tells you almost nothing you need. The spec sheet tells you nearly everything: the exact adjustment range, glass thickness, whether the door can be reversed for a left or right opening, the minimum curb width, the overall height, and the certification markings that confirm tempered safety glass. The installation manual, usually a separate download, reveals what the job actually involves, from blocking to sealant work.
The prevention habit: read both documents before checkout, every time, and keep the PDFs. Check your recorded measurements against the adjustment range and the door height against your plumbing. Five minutes with a spec sheet routinely saves a return shipment across the country.
Mistake 6: Buying on price alone
The cheapest door in the search results is rarely cheap by the time it is installed. Thin glass flexes, budget rollers wear quickly, plastic seals yellow and harden, and a narrow adjustment range can turn a routine install into a day of shimming, which you pay for in labour. Replacement parts matter as well: reputable manufacturers keep seals and rollers available for years, and a no-name import often does not. An oversized glass crate may travel a very long way in this country, so factor delivery into the total and inspect the crate before signing, whatever the weather.
The prevention habit: compare doors on total installed cost and lifespan, not sticker price. Glass thickness, hardware material, seal quality and a generous adjustment range are where the money goes.
Slow down before checkout
None of this requires special skill, just the habit of measuring carefully, reading the documents and buying the door as part of the whole shower. When you are ready to compare styles and adjustment ranges, browse the full shower doors collection, shipped Canada-wide, and find more planning help in our bathroom buying guides.
Frequently asked questions
What is the difference between framed, semi-frameless and frameless shower doors?
Framed doors surround the glass with metal on all sides, which allows thinner glass and usually a lower price. Semi-frameless doors trim only some edges, and frameless doors use thicker tempered glass with minimal hardware. Frameless styles are the least forgiving of out-of-plumb walls, so careful measuring matters most there.
How much out-of-plumb can a shower door absorb?
It depends on the model. Doors with wall channels or adjustable jambs publish an adjustment range on the spec sheet, and that range is your answer. Frameless doors that hinge directly off the wall have the least tolerance, which is why installers recommend them only for openings that check out close to plumb.
Should a shower door open inward or outward?
Outward opening or sliding is the common expectation across Canada, largely for safety, so the door never traps someone inside the enclosure. Many pivot doors swing both ways, which helps in tight rooms. Requirements are set locally, so confirm with your municipality or installer before ordering an inward-only design.
Is winter delivery of a glass shower door a problem in Canada?
Tempered glass itself is fine in the cold. The real risks are rough handling in transit and rushing installation. Inspect the crate on arrival and note damage before signing, then let glass and sealants reach room temperature; most silicones have a minimum application temperature a January garage will not meet.
