Measure the opening before anything else
A shower door is fitted into an opening that is almost never perfectly square. Walls lean, tiles build out unevenly and a base is rarely dead level, so doors are built with an adjustment range instead of a single fixed width. A door listed at 60 inches will usually cover a band a little either side of that number, and it is the band that has to contain the real opening, not the headline size.
Measure at three heights, at the base, at the middle and at the top, and work from the narrowest of the three. A difference of half an inch between top and bottom is common in an older bathroom and is exactly what the adjustment is there to absorb. Many of these doors are reversible too, which means the same unit handles a left or a right hand opening and the decision does not have to be made at the point of ordering.
What a shower door frame does
Frame style is the first thing people notice and the least understood. The frame is structure, not decoration: it carries the glass and seals the edges, and removing it moves both jobs onto the glass and the hardware.
- Frameless: a frameless shower door carries no visible metal around the panels, so the glass reads as a single sheet. It is the cleanest look and the most exposed, because the glass and the hinges or rollers are carrying everything.
- Semi frameless: a semi frameless shower door keeps metal where it is needed, usually a header rail and the wall channels, with the vertical edges left bare. It gives most of the frameless look while a rail carries the weight.
- Framed: metal all the way round. It is the most forgiving of an out of square opening and the tightest against leaks, which is why it persists over bathtubs.
How the door opens
A sliding shower door, also called bypass, is the largest group here and the answer for a small bathroom. The panels run on a track and nothing swings into the room, so a door can sit directly across from a toilet or a vanity without a clearance problem.
A pivot shower door or a hinged one swings out and needs the floor space in front of it to stay clear. In return it opens the full width of the entry, which is easier to step through and easier to clean around. A bi fold folds back on itself and splits the difference in a narrow room. A fixed screen has no moving parts at all and is the walk in arrangement: one panel, one opening, nothing to slide or swing.
Glass shower door thickness, honestly
A glass shower door is tempered throughout, and the thickness runs from about 6 mm at the thin end to 12 mm at the thick, and the right number depends entirely on what is carrying the weight. A sliding or semi frameless door hangs from a header rail, so the glass does not have to be structural and 6 mm or 8 mm is normal and perfectly sound. A fully frameless hinged enclosure has no rail at all, so the glass itself is the structure, and that construction wants 10 mm or thicker before it feels solid and not flexible.
Rail supported sliding doors are where the 6 to 8 mm band belongs, and that is the construction most of this range is built as. The pivot and hinged doors here sit in the same band rather than at the heavy end, which places them with the framed and semi framed designs rather than with a structural glass enclosure. That is worth saying plainly, because the word frameless covers both arrangements and a 6 mm panel on a rail and a 12 mm self supporting enclosure are different products wearing the same adjective.
Coatings, finish and the everyday
Hard water is what ages a shower door, and the water spots that build on untreated glass are mineral rather than dirt. A factory applied water repellent coating works on surface energy, not on pores, which glass does not have: water beads and runs off instead of spreading and drying in place, and the dissolved minerals leave with it. Some of these doors carry one, and it changes how much attention the glass needs, rather than removing the job.
Finish runs through matte black, brushed nickel, chrome and stainless. A black shower door has become the default in a modern bathroom, where the frame draws a deliberate line, and matte black is the best represented finish here. Brushed nickel and chrome disappear more readily into a traditional room. Whatever the choice, it is the same decision as the bathroom faucets and the bath accessories, because the three are seen together and a mismatch shows immediately.
Shower doors over a tub
A bathtub door is a different product from a shower door even when it looks identical: it is shorter, it seals against a tub rim, not a base, and the track has to clear the tub edge. A shower door fitted over a tub will not work, so the two are chosen separately.
The door is one part of an enclosure that also needs a base and a valve. Shower bases is where the trays live, shower systems covers the valve and head side, steam showers is a different sealing problem entirely, and niches and benches are the details planned into the tile before any glass arrives.