Shower Enclosure Adjustment Range: Use It as a Design Limit
Short answer: an enclosure adjustment range is the permitted difference between its reference size and the finished opening. It is a design limit, not a guarantee that the profile can absorb any wall error, tray radius or out-of-square corner.
Show the minimum and maximum positions on the approval drawing.
| Check | Evidence | Decision |
|---|---|---|
| Finished opening | Front, centre and rear widths | Identify taper and local variation |
| Adjustment range | Current model installation data | Confirm the range covers the opening |
| Wall plumb | Vertical readings at fixing points | Prevent twisted channels |
| Tray edge | Flat landing and level | Protects seal and threshold |
| Fastening | Fixing positions and substrate | Ensures adjustment remains supported |
Measure the opening the way the enclosure will see it
Use finished wall faces, not rough studs. Record both diagonals and the tray level. If the opening changes during tiling, issue a revised measurement rather than relying on the original nominal size.
Do not force a profile to the end of its slot or hide the gap behind a cover strip without checking the seal and fastener engagement.
Buyer FAQ
Can a large adjustment range correct a bowed wall?
Only within the stated geometry and seal limits. A range is not a structural correction.
Should installers use the midpoint?
Where practical, yes; it preserves usable adjustment for site variation and replacement.
What belongs in the handover record?
Finished measurements, adjustment position, fixings, seals and photographs before closure.
Continue the decision
Check the finished opening and coordinate the tray edge.
Enclosure Adjustment Range Check