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August 17, 2026·7 min read

What should I plan before converting a tub to a walk-in shower?

Decide what walk-in means for this user

A low curb, true curbless entry, wider opening, seat, handheld shower, and future grab bars solve different needs and require different construction.

Resolve water before finishes

The drain, slope, waterproofing transitions, penetrations, curb, corners, and glass splash pattern form one system. Tile is the visible layer, not the waterproofing plan.

Use the wall while it is open

Valve changes, blocking, plumbing condition, ventilation, air sealing, and damaged framing are easier to address before the wall is closed.

Vent moisture outdoors

EPA guidance stresses working exhaust that sends bathroom moisture outside rather than into an attic or enclosed cavity.

Bring these decisions into the estimate

  • Entry and accessibility goal
  • Drain and slope
  • Waterproofing system
  • Valve and handheld location
  • Blocking and storage
  • Glass swing and splash
  • Exterior exhaust path

Sources

  • EPA remodeling and indoor air quality guidance (epa.gov)
  • EPA remodeling moisture and ventilation guidance (epa.gov)
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