A cracked or failing shower base is one of the more serious problems in a bathroom — not because of what you can see, but because of what's been happening behind the tile while the crack has been there. In most cases, a failed shower base means water has been infiltrating the assembly for months or years before the visible damage appeared.
We handle shower base repairs and rebuilds across Orléans, Ottawa, Rockland, Kanata, Barrhaven, and surrounding communities. Our approach is always the same: diagnose first, propose what the situation actually calls for, and do the repair correctly so it doesn't need to be done again.
What Causes Shower Base Failure
Subfloor Movement and Deflection
In Ottawa-area homes — particularly older construction or homes with engineered wood subfloors — seasonal movement and deflection can stress a tile assembly beyond what standard thinset bonds can accommodate. When the subfloor moves and the tile can't follow, something cracks. An uncoupling membrane like DITRA, installed correctly during the original build, would have absorbed that movement. Without it, cracks in the shower floor are often inevitable over time.
Voids in the Thinset
A shower floor tile that isn't fully supported — voids behind the face from inadequate thinset coverage — is under stress every time someone stands on it. Enough use and enough weight, and the tile cracks at those unsupported spans. This is a pure installation error from the original job. The fix is to remove the tile, verify subfloor condition, and reset with full coverage.
Failed Waterproofing
If the original shower base was built without a proper waterproof membrane — or if the membrane was installed incorrectly — water has been getting into the assembly since day one. Over time, that water degrades the substrate, the subfloor, and eventually the structure around the shower. By the time tiles crack or the floor feels soft, the damage runs deeper than the surface. We remove what needs to come out, dry it correctly, and rebuild with a proper waterproofing system.
Insufficient Slope
A shower floor that doesn't drain completely allows standing water to remain after every use. That water accelerates grout deterioration and substrate degradation — and in a poorly waterproofed assembly, it accelerates the timeline of failure significantly. If your shower base pools water that takes more than a few seconds to drain from the flat surface, the slope is wrong.
How We Assess and Repair Shower Bases
Before recommending anything, we assess the shower thoroughly. We check for hollow tiles throughout the field (tap test), test for moisture in the substrate, evaluate the slope, and look at the condition of the grout and silicone joints. Based on that assessment, we'll tell you what the shower actually needs — not what produces the biggest job.
Possible outcomes:
- Localized tile repair — if a small area has failed and the surrounding assembly is sound, we can often repair just the affected tiles after addressing the cause
- Full shower floor rebuild — if the waterproofing is compromised, the substrate is wet, or the slope is wrong throughout, a full rebuild is the correct answer
- Reslope — in some cases, slope can be corrected without a full rebuild using appropriate pan compounds over the existing waterproofing if it's still intact
What a Correct Shower Base Rebuild Includes
When a full rebuild is the right call, here's what we do:
- Complete demo of the existing shower floor tile
- Assessment and repair of the subfloor — replacement of damaged sections if necessary
- Slope set to minimum ¼″ per foot toward drain — this is non-negotiable
- Waterproof membrane installed — Kerdi, liquid-applied, or DITRA depending on the configuration
- Drain assembly properly integrated with the membrane — no gaps at the most critical joint in the shower floor
- New tile set with 95%+ coverage, no voids, using the correct thinset for the application
- Silicone joints at all changes of plane — never grout at these locations
Service Areas for Shower Base Repair
We provide shower base repair and rebuild services across Orléans, Ottawa, Rockland, Kanata, Barrhaven, Cumberland, Gloucester, and Navan. If you're unsure whether we cover your area, reach out — we're happy to confirm.
Frequently Asked Questions
What causes a shower base to crack in Orléans?
Shower base cracks are almost always caused by one of three things: movement or deflection in the subfloor that the tile assembly can't accommodate, voids in the thinset beneath the tile creating unsupported spans that crack under load, or the original installation skipping a proper waterproofing and uncoupling system. In Ottawa's climate with significant seasonal temperature changes, subfloor movement is a particularly common contributor.
Can a cracked shower base be repaired without replacing the tile?
Rarely. If the crack is at the tile surface from a minor impact, a cosmetic repair may be possible. But if the crack is the result of movement, voids, or failed waterproofing — which is the case the majority of the time — a surface fix won't hold. We assess honestly and tell you upfront what the situation actually calls for.
How do I know if my shower base is leaking vs. just cracked?
A cracked shower base is almost always leaking — even if you can't see the water. Signs of leaking include soft spots in the floor adjacent to the shower, water staining on ceilings below, a persistent musty odor in the bathroom, or grout that deteriorates faster than it should. If you have a crack, assume it's leaking and get it assessed.
How long does a shower base rebuild take?
A full shower base rebuild — demo, subfloor repair if needed, waterproofing, and new tile — typically takes 3–5 business days. We give you a realistic timeline at the assessment stage.
Do you repair shower bases in Kanata and Barrhaven?
Yes. We handle shower base repairs across Ottawa including Orléans, Kanata, Barrhaven, Rockland, Gloucester, Cumberland, and Navan.