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Curbless shower slope and transition before tile checklist

A pre-tile curbless-shower checklist for structural recess or buildup, drain elevation, continuous slope, entry and bathroom transitions, waterproofing extent, glass and splash control, heating integration, accessibility goals, flood-test evidence, and finish-height coordination.

6 items to check

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Structural recess, buildup, and drain elevation achieve the planned finish heights

Critical item

The assembly should provide required support and drainage without unapproved structural modification.

The entire wet-area substrate drains continuously to the drain

Critical item

Slope should be continuous and compatible with tile size and drain geometry without backfall.

Waterproofing extends through the transition and intended splash zone

Critical item

The approved system should remain continuous beyond the nominal shower footprint where required by design and exposure.

Entry width, glass, splash control, and door operation match the water-management plan

Critical item

The layout should limit water escape while preserving intended access and operation.

Flood or required water test is passed and the assembly is protected

Critical item

Testing should occur before tile and defects should be repaired and retested.

Elevations, slopes, membrane limits, and test evidence are accepted before tile

The owner should retain enough evidence to distinguish design from later tile workmanship.

Use after the receptor substrate and waterproofing are complete but before tile. A curbless appearance does not eliminate drainage, waterproofing, structural, or accessibility requirements. Inspect from the room, accessible framing, and dated stage photographs. Do not energize exposed electrical work, pressure-test systems without authorization, or walk on uncured waterproofing, mortar, or heating assemblies.

Reference standards

  • Approved bathroom plan, adopted state and local code, permit and inspection conditions, authority having jurisdiction requirements, signed scope, and exact plumbing, waterproofing, ventilation, heating, tile, glass, and accessory manufacturer instructions
  • Approved receptor, linear or point drain, waterproofing, accessibility, tile, heating, and glass details

    • Tools

  • Approved plans, fixture and product submittals, permit records, and authorized change orders
  • Tape measure, level, flashlight, camera, and manufacturer-approved test records
  • Dated pre-cover photographs showing every wall, floor, penetration, backing location, and test result

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