Residential · Toilets, sinks & showers
Basement Bathroom Rough-In in Markham
The rough-in is the part of a basement bathroom nobody sees once it is finished, and the part that decides whether everything drains well for decades.
- Caulk and grout lines checked around the fixture
- Parts matched to the brand you already have
- Seized stops replaced while we are there
- Old fixtures and packaging taken away
- Licensed plumbers (details on request)
- Price agreed before work
- Call-only, no forms
- Tested before we leave
Signs you need a basement bathroom rough-in
The basement is getting finished, a suite for family is in the works or simply tired of climbing two floors for a washroom. Many Markham homes built in the last thirty years already have capped drain stubs poking out of the slab, often in a corner near the stack. Older houses usually do not, and those need a little more work with a saw and a jackhammer.
- Capped pipes in the floor that you are not sure how to use.
- A basement renovation that has framing drawn but no fixture layout yet.
- A plan for a laundry sink or wet bar alongside the bathroom.
Our routine on the day
We start with a layout walk-through. Toilet, sink and shower positions are measured from the existing stubs or the main stack, and we check whether gravity drainage will reach the sewer. Where it will, we cut a trench in the slab, lay ABS drains at the correct slope, tie into the building drain and backfill. Where the main sits too high, we talk about an upflush or sewage ejector system instead.
Venting comes next. Every fixture needs a vent, and in a basement that usually means running a line up through the framing to join an existing vent above. Supply lines in PEX or copper follow, with shut-offs at each fixture. Finally, we test the drains with water before the concrete is patched, so any problem shows up now instead of after the drywall is painted.
Markham houses and what shapes this job
Homes in Berczy Village, Box Grove and Cathedraltown often have pre-installed rough-ins, which makes the job quicker. Houses from the 1970s in Milliken Mills or Thornhill may need more slab cutting and a careful look at the cast iron below. Areas with high water tables make a backwater valve worth weighing for the main drain, since a new low fixture is exactly where sewage would appear first in a backup.
Planning tips
Keep the toilet close to the main stack where you can, since long horizontal runs mean more slab cutting. A shower drain needs its own trap below the floor, so finalize the shower size before we trench. And leave room for a future laundry sink if there is any chance you will want one.
Ring us without delay if
Call before the framers close the walls, not after. It is also worth calling if a capped stub in the floor smells of sewer gas, which can mean a missing or dry trap. For broader planning, the basement renovation plumbing brief walks through the order of trades.
Finally, we test the drains with water before the concrete is patched, so any problem shows up now instead of after the drywall is painted.
From the job notes of Plumbers in Markham
Job card · Toilets, sinks & showers
On the van for this job
- Basin wrench, tubing cutter and press or compression tools
- Cartridges for common shower and faucet brands
Signs you need this
- The toilet runs or refills on its own
- The shower goes scalding when someone flushes
What we check before we pack up
- Fill and drain the fixture and watch every joint
- Set temperature limits on shower valves
| Fixture | Parts that wear | What to know |
|---|---|---|
| Toilet | Flapper, fill valve, wax ring | Rocking means bolts or wax |
| Shower valve | Pressure-balance cartridge | Access panel saves tile |
How the job runs, start to finish
- 1
On the phone
Explain what the water is doing and where. We ask the age of the house and which valve or breaker to shut while we drive over.
- 2
Drop cloths down
Floors and cabinets get covered, the water or gas is isolated and the work area is lit.
- 3
Find the failed part
We open the trap, cleanout, access panel or wall where the fault is, and show you what we found.
- 4
Quote, then work
We explain what failed and what the fix costs; no cutting starts until you say yes.
- 5
Cut, fit, seal
Old parts come out, new pipe, valves or fixtures go in, and joints are soldered, pressed, crimped or glued.
- 6
Test and ticket
We run water, pressure-test or fire the heater, check for drips, clean up and leave a written ticket of what was done.