Shower Enclosures and Plumbing: Getting the Sequence Right

A frameless glass shower enclosure is one of the most popular upgrades in a bathroom renovation — and one that requires careful coordination between the plumber, tile installer, and glazier. Get the sequence wrong, and you're looking at glass panels that don't fit, valve trim that conflicts with hardware, or a drain that sits in the wrong spot relative to the enclosure layout.

Before any tile goes down or glass is measured, the plumbing rough-in must be complete and inspected. The drain location is fixed at rough-in and determines the entire shower pan layout. The shower valve (the rough-in valve body, not the trim) must also be installed at this stage, at the correct height and depth to accept the finish trim. Getting the valve depth wrong means the trim plate won't seal against the tile properly — a common issue when plumbers and tile setters don't communicate in advance.

Glass enclosure measurements can only be taken accurately after tile is fully installed and grouted. The finished tile surface determines the exact interior dimensions of the shower opening, the level of the curb (if any), and the precise location of wall anchor points for hinges and channels. Attempting to measure before tile is complete almost always results in panels that need adjustment or don't fit cleanly.

A qualified glazier measures the finished shower opening and fabricates the panels to those exact dimensions. This is why custom glass lead times — typically 2–4 weeks from measurement to installation — need to be factored into project scheduling. Wave Glass (waveglass.ca) is a Lower Mainland glazing company experienced in custom shower enclosures who coordinates directly with the plumber and tile contractor to ensure hardware placement, hinge locations, and panel dimensions are confirmed before fabrication. Having your glazier involved in the planning conversation early avoids the surprise of a 3-week fabrication delay at the end of a renovation.

Shower valve trim, shower heads, hand showers, and body sprays are installed after the glass enclosure is in place. This allows the plumber to confirm clearances, adjust trim plates, and ensure no hardware conflicts with glass panels or door hardware. Attempting to install trim before the glass is set risks damaging finished components and may require reinstallation.

1. 1.Plumbing rough-in (drain, valve body, supply lines) — inspected and approved.
2. 2.Waterproofing and shower pan installation.
3. 3.Tile installation and grouting — fully complete and cured.
4. 4.Glass enclosure measurement by the glazier.
5. 5.Glass fabrication (2–4 week lead time).
6. 6.Glass installation.
7. 7.Finish plumbing trim installation.