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Shower niche and bench waterproofing before tile checklist

A pre-tile shower niche and bench checklist for framing stability, sloped horizontal surfaces, membrane continuity, corners, seams, penetrations, prefabricated components, transitions to wall waterproofing, cure, and photographic evidence.

6 items to check

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Niche and bench framing is rigid, supported, and coordinated with utilities

Critical item

The substrate should resist movement and avoid conflicts with pipes, wiring, exterior-wall insulation, or structural members.

Sills, shelves, ledges, and bench tops slope toward the shower

Critical item

Horizontal surfaces should drain according to the approved system rather than hold water against walls or glass.

Membrane, corners, seams, and transitions are continuous

Critical item

Inside and outside corners should use approved pieces, folds, overlaps, or liquid-film thickness.

Fasteners, brackets, valves, and future accessory points do not compromise waterproofing

Critical item

Penetrations should be avoided or detailed with approved sealing and backing.

Prefabricated and field-built components are compatible with the wall system

Adhesives, sealants, membranes, backers, and cure sequence should be approved together.

Slope, continuity, cure, and photos are accepted before tile

Tile should not proceed until defects are repaired and evidence is saved.

Use after niches, benches, shelves, and ledges are fully waterproofed but before tile. The receptor flood test alone does not prove these elevated features are correct. 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
  • Waterproofing-system details for niches, benches, corners, seams, prefabricated components, and horizontal surfaces

    • 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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