Rough-in

Rough-in is everything you do not see: the drain, vent, and supply lines run through framing before drywall, tile, and fixtures are installed. It is inspected separately from the finished work. Getting rough-in dimensions right is what makes a bathroom remodel go smoothly, because moving a drain after tile is expensive.

Why the invisible stage decides how your remodel turns out

Every finished bathroom is built on top of dimensional commitments made at rough-in: where the toilet flange sits relative to the wall, the height of the shower valve, where the drain lands in the vanity cabinet. Tile, stone, and drywall then lock those decisions in place — relocating a drain after finishes go on means demolition, which is why rough-in mistakes are the most expensive kind. It is also the stage the inspector signs off before walls close, protecting you from buried problems. A remodel that goes smoothly is almost always one where the rough-in was planned around the actual fixtures, not generic assumptions.

Lock your fixture choices before the rough-in, not after

The moment to finalize your tub, shower valve, toilet, and vanity selections is before pipes go into the walls — every fixture has its own rough-in specs, and a wall-hung vanity or freestanding tub filler needs completely different piping than the standard versions. Mid-project fixture changes after rough-in are where remodel budgets quietly bleed. If you are buying an older Corridor home mid-renovation, or a previous owner's remodel looks off, an inspection of what is behind the walls before finishes go on is cheap insurance against inheriting someone else's shortcuts. Venting deserves special attention at this stage too — an unvented or poorly vented fixture will gurgle and drain slowly forever, and it is only fixable while the walls are open.