Bonded membranes, correctly sloped pans and sealed penetrations — wet areas engineered and leak-tested to keep water exactly where it belongs.
Waterproofing is the part of your bathroom you will never see and the only part that can quietly destroy the rest of your house. Tile and grout are not waterproof. Water passes through grout, and what stops it reaching your framing is the membrane assembly underneath.
Diamond Tiling builds wet areas on proven waterproofing systems — Schluter and equivalent bonded assemblies — across Toronto and the GTA. Every shower we build is flood-tested before a single tile is set.
We build wet areas on proven waterproofing assemblies — Schluter and equivalent systems — with bonded membranes, sloped pans and sealed penetrations engineered to keep water exactly where it belongs.
Waterproofing works as a continuous assembly: bonded membrane on walls and floor, sealed corners and changes of plane, waterproof collars at every pipe and valve penetration, and a drain designed to bond to the membrane. Mixing components from incompatible systems is one of the most common causes of failure, and it usually voids the manufacturer warranty.
A shower floor must slope consistently to the drain — no flat spots, no ponding. We build sloped pans to the correct fall, and for curbless and wet-room designs we handle the linear drains and recessed framing that let the floor run level into the shower without water escaping.
We plug the drain, fill the pan, and leave it. If the assembly holds, tile goes on. If it does not, we find out at the only stage where fixing it is straightforward. Skipping this test saves a day and risks a rebuild.
A look at the craftsmanship we bring to homes across Toronto and the GTA.
Bridle Path, Toronto
A walk-in spa shower with multiple heads, full marble-look walls and a concealed linear drain.
Oakville, ON
A bright Carrara-look walk-in shower with frameless glass and a recessed niche.
Lawrence Park, Toronto
A timeless marble-look walk-in with a contrasting dark floor and crisp glass entry.
The questions homeowners ask us most about this service.
No. Grout is porous and water moves through it steadily. Sealers slow surface absorption but are not a waterproofing layer. What actually protects the structure is the bonded membrane assembly behind the tile — which is why a shower can look perfect while soaking the framing behind it.
Common signs are loose or hollow-sounding tile, grout that keeps cracking in the same corner, musty smell, discoloured paint or soft drywall on the other side of the shower wall, and stains on the ceiling below. By the time these appear the leak has usually been active for some time.
Yes — curbless entries are one of our specialities. They require recessing the subfloor or building up the surrounding floor, a linear or offset drain, and careful membrane detailing at the transition. Done properly they are as watertight as a curbed shower and considerably better to live with.
We deliver waterproofing systems throughout Toronto and the surrounding Greater Toronto Area.
Most projects combine more than one of our specialities.
No surprises, no mess left behind. Four straightforward steps that keep your project on track and on budget.
We review your space, materials and vision, then provide a detailed, transparent quote.
We plan tile layout, waterproofing and transitions so every cut and line is intentional.
Our crew prepares substrates, waterproofs wet areas and installs with millimetre precision.
We clean, detail and walk the finished space with you to confirm it exceeds expectations.
Tell us about your space and we’ll provide a clear, transparent quote — no pressure, just expert advice.