The shower has passed its water test. The glass installer arrives with a drill. Both events can belong in a good installation, but the detail between them needs to have been discussed.
Choose the fixing arrangement early
Identify where the glass will be supported and which brackets or channels it uses. Ask whether any proposed fastener penetrates a horizontal waterproofed surface, and have the system providers resolve that detail before tile is installed.
Do not assume a bead of sealant around every screw is a universal solution. Schluter's puncture-repair guidance distinguishes repair conditions and methods. It does not authorize every bracket arrangement in every location.
Coordinate support beneath the finish
Tile is the visible finish, not the whole fastening substrate. Provide the glass dimensions and hardware requirements to the renovation team while backing and framing can still be adjusted.
Make the handoff explicit
- Confirm the hardware and support requirements before tiling.
- Record the agreed fixing and waterproofing details.
- Mark concealed backing locations accurately for the glass installer.
- Resolve any later change before a new hole is drilled.
Ask who takes responsibility for coordinating the interface. Two installers can each know their own product well and still need a shared detail at the connection.
The practical next step is to treat the glass as part of the shower design from the start. It should not arrive as an independent accessory with permission to make whatever holes it needs.
Use the same open-wall planning stage to consider backing for future grab bars, with its own support and waterproofing requirements.