Map Drainage, Waterproofing and Clearance Impacts

Define the use goal

Record bathing, showering, transfer, seating, storage, cleaning and resale considerations without assuming one solution suits every user.

Prepare a measured plan

Mark room, door, window, fixtures, walls, floor changes and vertical constraints; treat final clearances as design inputs.

Separate keep from move

A replacement in place and a relocated fixture carry different demolition, rough-in, floor and approval questions.

Map drainage and supply

Ask how drain location, slope, venting, supply, shutoffs and below-floor access affect the proposal.

Draw the wet-area assembly

Connect substrate, receptor, curb or entry, membrane, corners, penetrations, doors or screens and adjacent finishes.

Coordinate electrical and design review

Record outlets, lighting, fans, heating, controls, support or blocking and professional checks before final layout.

Test the proposed movement path

Sketch entry, door swing, turning, transfer, seating, fixture approach and caregiver space using actual user tasks. Treat dimensions and support locations as design inputs requiring project-specific review, not as a universal accessible layout.

• Include wet-foot travel
• Check towel and storage reach
• Record future support needs

Trace rough-in consequences

For every moved fixture, map drain route and slope, venting, water supplies, shutoffs, joist or slab constraints and access from spaces below. Separate confirmed records from assumptions that require investigation.

• Protect structural members
• Plan shutdown coordination
• Price investigative openings

Draw the complete shower assembly

Show receptor or base, slope, curb or entry, drain connection, substrate, membrane, corners, penetrations, doors or screens and outside-floor transition. Require compatible product documents and evidence before concealment.

• Coordinate blocking and controls
• Define water-test responsibility
• Record threshold and drainage detail

Create the layout-change coordination drawing

Overlay existing and proposed fixtures, door and movement paths, drain and vent routes, water supplies, joist or slab constraints, electrical and fan locations, support or blocking and the complete wet-area assembly. Mark investigative openings and decisions required before ordering. Link dimensions to actual user tasks and qualified design review, then assign each trade interface and finish repair. Preserve the final drawing with concealed-work evidence. It coordinates the tub-to-shower or room change without promising universal accessibility, structural feasibility, drainage performance or permit acceptance. Before demolition, mark key dimensions and penetrations on site against the accepted drawing. Any conflict involving structure, plumbing, wet-area continuity or user clearance should return to the responsible design review before work proceeds.

• Use measured existing conditions
• Show below-floor access
• Map every membrane transition
• Coordinate controls and blocking
• Record final as-built changes