Table of contents
- Why the plumbing comes before the tile
- What older homes around here throw at you
- Moving fixtures: The choice that changes everything
- The shower valve: Pick the guts, not just the handle
- Drains and vents: The part nobody thinks about
- Hot water: Can your tank handle the new shower?
- Permits and order of work
- What you can do yourself, and what you shouldn't
- The five things to settle this week
Why the plumbing comes before the tile
Tile is the last thing that happens. Underneath it sit the supply lines, the drains, the vents and the shower valve. Once that wall is closed up and tiled, getting back in there is a project of its own.
Almost everyone starts with finishes, and that makes sense. Tile and taps are the fun part. The catch is that every finish brings a plumbing decision with it.
What gets buried behind a bathroom wall?
Here's what gets buried and stays buried:
- Supply lines running to each fixture
- The shower valve body
- Drain and vent piping
- Blocking for a grab bar or a wall-hung sink
- The carrier frame, if you're going with a wall-hung toilet
You never see any of it once the job is done. That's the point. It also means it's all locked in place the moment the tile goes on.
What happens if you move a fixture after tiling?
Say you decide after tiling that the vanity should sit a foot to the left. The tile comes off, the waterproofing gets cut, and both get rebuilt before anyone can use the room.
That's days on the schedule and trades coming back. The same call in week one takes five minutes.
What older homes around here throw at you
Bathrooms here are often original to the house, so the layout was never designed to change. Once the wall is open you find out what you're working with, and two local quirks come up often enough to plan for.
Does your home sit in a high-pressure zone?
Parts of South Surrey run at high water pressure. Fixtures and valves wear faster on it, and a brand new tap can start dripping sooner than it should.
A renovation is the natural time to check the pressure and sort it out. The walls are already open and the fixtures are coming out anyway.
What the sand near the beach does to new fixtures
Homes around Crescent Beach deal with sand and sediment in the water. Old taps shrug it off. New fixtures have finer cartridges and tighter aerators, and they don't.
Worth raising before you choose fixtures, so the ones you pick can handle what comes out of the tap.
Moving fixtures: The choice that changes everything
Nothing drives the plumbing bill like a new layout. Leave the fixtures where they are and the job stays simple. Move them and things get interesting.
Can you move the toilet?
The toilet drain is the biggest pipe in the room and the fussiest. Even a small move means opening the floor and rebuilding the drain so it still falls at the right angle.
Which way your joists run decides how far it can go. Running the same direction as the joists gives you room. Running across them is a different story. There's a limit to how much you can notch a joist before it stops doing its job.
How far can a shower or tub drain move?
Shower and tub drains give you more room to play with than a toilet does. They still need slope, and somebody still needs to get at them.
A tub-to-shower conversion usually shifts the drain a few inches. Sounds like nothing. It isn't. Decide your shower size, door swing and bench before anyone opens the floor. Each one moves the drain.
The shower valve: Pick the guts, not just the handle
This is the one people leave to the end and regret. The handle you see is the trim. The part that matters is the valve body sitting inside the wall.
Why the shower valve and trim have to match
Trim kits are built to fit their own manufacturer's valve body. A handle from one brand and a valve from another almost never play nicely together. Finding that out after the tile is on means opening the wall.
So pick the manufacturer and the valve first. The finishes follow, and there are plenty of them.
Thermostatic or pressure balancing?
A pressure-balancing valve keeps your shower temperature steady when somebody runs a tap downstairs. A thermostatic valve holds a temperature you set and adds separate volume control. That's what you need for more than one head.
Ask your plumber which type your renovation needs under current code before you buy anything.
Drains and vents: The part nobody thinks about
Venting is invisible and nobody asks about it. It also decides whether your new bathroom drains quietly or gurgles for ten years.
Why every new fixture needs a vent path
Every drain needs air behind it. Without a vent path, water pulls the trap dry on its way out. That trap is what keeps sewer gas out of your bathroom.
Add a second sink or move a fixture and it can end up out of reach of the existing vent. That's a design question, answered before framing.
What changes in a tub-to-shower conversion?
A tub drain and a shower drain don't always use the same size pipe or trap setup. Swapping one for the other is real plumbing work, even when the footprint looks identical.
Going curbless adds one more check. The drain and the sloped floor both have to fit inside the depth of your joists. In some homes there's room. In others there isn't.
Hot water: Can your tank handle the new shower?
More fixtures means more demand. A water heater that was fine for one bathroom might struggle with two.
A big rain head and body sprays pull far more hot water than a regular showerhead. Run them together and a tank sized for the old bathroom runs out fast. Pick your showerhead before your plumber sizes anything.
Scald protection belongs in the same conversation, and it matters most in a house with small kids or older adults. Your plumber handles that part.
Permits and order of work
Most bathroom renovations that move plumbing need a permit and a rough-in inspection before the wall closes. That inspection is a gate, not paperwork.
When does the rough-in inspection happen?
Drywall goes up after the rough-in passes, not before. Close it early and hope for the best and you'll be opening it again.
Build the inspection into your schedule from day one. Your plumber will know the current wait in your municipality.
What order should the work happen in?
Here's the sequence that works:
- Demolition
- Rough-in plumbing and electrical
- Inspection
- Insulation and drywall
- Waterproofing
- Tile
- Fixtures and trim
Each step depends on the one before it. Renovations run late when that order gets shuffled to suit a delivery date. Holding the line beats saving a week on one order.
What you can do yourself, and what you shouldn't
Plenty of a bathroom renovation is fair game for a confident homeowner, and what you save is real money.
Go ahead and tackle:
- Ripping out old tile and finishes
- Pulling the old fixtures once the shut-off valve is closed
- Painting
- Swapping a toilet seat or a tap aerator
- Every selection decision in this article
Leave to a licensed plumber:
- Anything that moves a drain or changes venting
- Opening a wall for supply lines
- Setting a shower valve
- Connecting a gas water heater
- Anything that needs a permit and inspection
Those are the jobs that fail quietly behind tile, and the ones your insurer asks about after a claim.
Our plumbers are Red Seal certified on top of their licensing, and we've been doing bathroom renovations in South Surrey since 2004.
Got a layout sketched out on paper? Text us a photo of it. We'll tell you what moves easily and what needs the floor opened up, before you order a thing. Call or text 📞 (604) 897-4989 and the quote is free.
The five things to settle this week
- Are the fixtures staying put or moving? The toilet especially.
- Which shower valve manufacturer and valve type, before you order any trim.
- Shower size, door swing and drain position, all decided together.
- Which showerhead, so your hot water can be checked against it.
- When the permit and inspection happen, built into the schedule from the start.
Get those five sorted and your plumber can rough in the whole room once. Leave them open and that wall gets opened twice.
Questions we get asked a lot
Can I move the toilet?
Usually, yes. How far depends on your joists and the slope you've got to work with. A short move along the joists is straightforward. Anything bigger needs someone to look at the floor first.
Planning a bathroom in South Surrey, White Rock or Langley? Get the plumbing scoped before you order tile and the wall gets opened once. We answer Monday to Friday, 8:00 AM to 4:00 PM.
📞 Call or text (604) 897-4989 for a free quote, or read what neighbours have said about us first.
