A bathroom is the smallest room most people renovate and, pound for pound, the heaviest to tear out. Between porcelain fixtures, ceramic tile, the mortar holding it on, and in older homes a cast iron tub that weighs as much as a motorcycle, bathroom demolition produces a surprising amount of dense debris from a very small space.
This guide walks through how to take a bathroom down to the studs safely: shutting off services, removing fixtures in the right order, dealing with each kind of tub, getting tile off walls and floors, and planning a bin around the weight rather than the volume.
Tools that make it easier
A bathroom can be demolished with a hammer and a pry bar, but the right tools save hours and a good deal of frustration:
- A reciprocating saw with demolition blades, for cutting walls, tub surrounds, and stubborn vanities.
- An oscillating multi-tool, for clean cuts close to plumbing and for slicing through grout.
- A rotary hammer with a chisel bit, for floor tile and mortar beds. Rental shops carry them by the day.
- A flat pry bar, a cat's paw, and a sturdy hammer.
- A utility knife, a putty knife, and a floor scraper.
- A shop vacuum, ideally with a fine-dust filter.
- Safety glasses, hearing protection, heavy gloves, and a well-fitted respirator.
Renting a rotary hammer for a day is often cheaper than you would think, and it turns a weekend of chiselling into an afternoon.
Plan the scope first
Before you start, decide exactly what is coming out. A full gut takes everything down to the studs and subfloor. A partial renovation might keep the tub, the floor, or the plumbing layout. Mark anything staying, so nobody removes it by accident.
Think about salvage too. A vanity in good shape, a mirror, light fixtures, and even a newer toilet can be donated. Habitat for Humanity ReStores accept many bathroom fixtures in good condition. Every piece that leaves for reuse is one less thing in your bin.
Shut off the water and power
Turn off the water supply to the toilet and sink at their shut-off valves. If there are no valves, or if they are seized, shut off the main and install new valves before you go further. Open the taps to drain the lines.
Switch off the breaker for the bathroom, including the exhaust fan, lighting, and any heated floor. Test outlets with a non-contact voltage tester before you remove anything electrical. Bathroom outlets are usually on a GFCI circuit, so check which breaker or GFCI outlet controls them.
The toilet
Toilets are heavier and messier than people expect. Here is the clean way to do it:
- Turn off the supply valve and flush to empty the tank and bowl.
- Sponge or towel out the remaining water from the tank and bowl.
- Disconnect the supply line.
- Pop off the bolt caps at the base and remove the nuts.
- Rock the toilet gently to break the wax seal, then lift it straight up. A two-piece toilet can weigh 60 to 120 pounds, so get help.
- Stuff a rag into the drain opening immediately to block sewer gas, and scrape off the old wax ring.
Porcelain goes in the bin without fuss. Wrap the toilet or set it carefully in the bin rather than dropping it, since broken porcelain is razor sharp.
Vanity, mirror, and accessories
Remove towel bars, toilet paper holders, and the medicine cabinet first. Mirrors are often glued to the wall. Put a large X of tape across the mirror before you pry it off, wear gloves and eye protection, and work it loose slowly. The tape holds the pieces together if it cracks.
For the vanity, disconnect the drain and supply lines, remove the countertop (cultured marble and stone tops are heavy), and unscrew the cabinet from the wall.
Tubs and showers: three very different jobs
The tub is where bathroom demolition gets interesting, because the job depends entirely on what the tub is made of.
Acrylic and fibreglass tubs and shower surrounds are light. Once the surrounding wall is opened and the drain is disconnected, they can often be cut into manageable pieces with a reciprocating saw and carried out in sections. Wear a mask; the dust is unpleasant.
Enamelled steel tubs are heavier than plastic but still manageable for two or three people once they are freed from the walls.
Cast iron tubs are another matter. They commonly weigh 250 to 500 pounds. You have two choices. You can remove the tub whole, which takes three or four strong people, a furniture dolly, and a clear path out of the house. Or you can break it in place with a sledgehammer. Cast iron shatters into sharp, heavy chunks, so cover the tub with a heavy moving blanket, wear safety glasses, gloves, long sleeves, and hearing protection, and strike near the edges. The noise is spectacular.
Cast iron has scrap value, so the pieces can go to a scrap yard instead of your bin. Our guide to scrap metal recycling explains how.
How to remove tile
Tile removal depends on what the tile is attached to.
Wall tile set on drywall or green board is the easy case. Rather than chipping off every tile, cut the wall out in sections with the tile still attached, using a reciprocating saw or oscillating tool, and carry the sections to the bin. It is faster and much less dusty.
Floor tile on a modern backer board or plywood comes up with a hammer and a flat chisel, a floor scraper, or for larger areas, a rotary hammer with a chisel bit. Work from an edge or a broken tile outward.
Always wear safety glasses and gloves. Tile breaks into sharp shards, and pieces fly further than you would expect.
Mortar beds and the weight problem
Many older Ontario bathrooms were tiled the traditional way, on a thick bed of mortar reinforced with wire mesh. A mortar-bed floor can be well over an inch thick, and walls were often done the same way.
That construction is extremely durable and extremely heavy. Mortar beds with tile can weigh somewhere around 15 to 20 pounds per square foot. A 5 by 8 foot bathroom floor alone could produce 600 to 800 pounds of debris, and tiled walls done the same way can add far more. All told, a full bathroom gut with mortar beds and a cast iron tub can reach one to two tonnes, from a room that fits a single person comfortably.
Removing mortar beds is heavy work. A rotary hammer with a chisel bit is the right tool, and cutting the mesh with tin snips or an angle grinder helps free sections.
Protect the drains and cap the lines
Once the toilet and vanity are out, you are left with open pipes, and two problems come with them.
The first is sewer gas. An open toilet flange or drain lets sewer gas into the house, which is unpleasant at best. Stuff a rag into the opening, or better, use a rubber test plug sized for the pipe, and tape a note to it so nobody forgets it is there.
The second is debris. Tile chips, grout, and drywall dust that fall into an open drain can cause a clog that is expensive to clear later. Keep every drain plugged or covered until the new fixtures go in.
Supply lines should be shut off at their valves, and if the valves are old, corroded, or weeping, this is the time to replace them. If a shut-off will not close fully, turn off the water at the main and have the line capped. A licensed plumber can cap supply lines properly in a short visit, and if you are moving or adding plumbing as part of the renovation, a building permit is usually required.
What you might find underneath
Bathrooms hide water damage better than any other room. Expect to find:
- Rotted subfloor around the toilet flange and under the edge of the tub, where slow leaks went unnoticed for years.
- Old cast iron or galvanized drain lines that may be worth replacing while the floor is open.
- Mould on the backs of walls behind the shower.
In homes built before about 1990, some old floor tiles, adhesives, and wall texture can contain asbestos, and older paint may contain lead. Test before you break into suspect materials. Our guide to asbestos testing explains how.
Sizing the bin
By volume, most bathroom demolitions fit comfortably in a 10-yard bin. Weight is the real constraint. Our standard rental includes 1 metric tonne of disposal, and a heavy bathroom with mortar beds and cast iron can exceed that. Tell us about mortar beds, stone vanity tops, and cast iron when you book, and read our guide to dumpster weight limits so the load is planned properly.
For a lighter partial renovation, a Bam Bag rated to 1 tonne can be enough. For full guts, our residential rentals put the bin right outside, with boards underneath to protect the driveway. The bin size guide compares sizes in more detail.
Protect the rest of the house
Bathroom debris has to travel through the house to get outside, usually down a staircase. Lay floor protection along the whole path. Measure doorways and stairways before you try to carry out a tub or a vanity in one piece. Seal the bathroom door with plastic to keep dust contained, and cover heating vents.
A realistic timeline
With two people and a bin in the driveway, a typical bathroom can be taken down to the studs in one to two days. Mortar beds and cast iron tubs add time. Leave a buffer before the renovation starts, since rotted subfloor and old plumbing often need attention once the room is open. Our guide to kitchen demolition covers the other big renovation tear-out, and the same order of work applies.
Where we help
We deliver bins for bathroom renovations across southern and eastern Ontario, including Etobicoke, North York, Guelph, and Newmarket. Call your local division, tell us what is coming out, and we will help you plan the bin around the weight.
