Bathroom Remodel Sequence: Why the Order of Work Matters More Than the Materials

Remove existing fixtures, vanity, toilet, and any materials being replaced. Demo wall surfaces back to the studs if you're retiling or replacing drywall. Protect the subfloor — if it's structurally sound, you want to keep it. Bag debris and remove it promptly; a clean workspace prevents damage to framing and prevents tripping hazards.

This is when supply lines and drain lines are repositioned or extended if your layout is changing. If you're keeping the same fixture locations, this phase may be minimal. Work must be done before walls are closed. Common tasks include setting the shower valve body, roughing in the tub drain, and repositioning the toilet flange if needed.

Add or reroute circuits as needed — GFCI-protected outlets, exhaust fan wiring, vanity light circuits. In the US, bathroom receptacles within a certain distance of water sources are required by code to be GFCI-protected. Like plumbing, rough electrical must be inspected before walls are covered.

Once inspections are passed, insulate exterior walls as needed, then install appropriate wall substrate. Standard drywall is not suitable for wet areas — shower walls and areas within splash range require cement backer board or a comparable moisture-resistant panel. Use moisture-resistant drywall (often called greenboard) in non-wet areas like above vanities.

Apply a waterproofing membrane to the shower walls and floor substrate before any tile is set. This step is non-negotiable and frequently skipped by inexperienced DIYers — it is the primary defense against water intrusion into the wall cavity. Follow the manufacturer's coverage and cure time requirements exactly.

Set wall tile before floor tile so that floor cuts can be made to meet the wall tile cleanly. Start shower walls from a level reference line, not the floor (floors are rarely perfectly level). Use appropriate thinset mortar for the substrate type. Allow the mortar to cure fully before grouting — typically 24 hours, but confirm with the product data sheet.

Grout tile joints once mortar has fully cured. Use unsanded grout for joints under 1/8 inch, sanded for wider joints. After grout cures (typically 72 hours minimum), apply silicone caulk — not grout — at all inside corners and at the tile-to-tub or tile-to-floor transition. Grout cracks at corners because those joints flex; caulk accommodates movement.

Paint walls and ceiling after tile work is complete but before fixtures and trim are installed. This sequence lets you cut in cleanly against tile without worrying about scuffing installed hardware. Use a paint specifically formulated for high-humidity spaces. Prime bare drywall before painting — skipping primer leads to uneven sheen and poor adhesion.

Set the vanity cabinet first, then connect plumbing once the countertop and sink are in place. Install the toilet using a new wax ring — never reuse the old one. Set the shower valve trim, showerhead, and any tub hardware. Connect supply lines and test every connection under pressure before moving on.

Install vanity light fixtures, outlet cover plates, the exhaust fan grille, and any other electrical trim. Then mount towel bars, toilet paper holders, mirrors, and shelving. Installing accessories last protects them from damage during tile and painting work and ensures accurate placement now that all surfaces are finished.