A quick rule of thumb: the homeowners who avoid problems are the ones who get everything in writing, verify licensing and insurance before work starts, and never rely on a verbal promise for anything that matters. If a detail is important enough to ask about, it is important enough to have in the written quote or contract.

— WikiQuestions editorial guidance

Tile failures range from aesthetic issues (uneven grout, poor layout) to structural failures (waterproofing failure causing mold and moisture damage). The response depends on the severity and the timing — problems caught before grout is applied are much simpler to fix than problems discovered after the tile has fully cured.

If You Discover Problems Before Grout Is Applied

This is the best time to catch and fix installation problems. Before grout, individual tiles can still be removed and reset. Issues to address at this stage:
  • Hollow-sounding tiles: Tap set tiles with a coin — a hollow sound indicates inadequate mortar coverage. Ask the setter to reset hollow tiles with proper back-buttering technique.
  • Lippage: Adjacent tiles at different heights. Easier to correct before mortar fully cures.
  • Layout problems: A tile that’s clearly off-pattern or where cuts are not as agreed. Address before the run is complete.
Tell the setter immediately and ask for correction before grouting proceeds.

Step 1: Document the Problem After Completion

A construction worker lays tiles in an indoor renovation project, wearing safety gear. For problems discovered after the installation is complete: Photograph every deficiency clearly: – Hollow-sounding tiles (mark with tape, photograph the locations) – Cracked tiles – Uneven grout lines or inconsistent joint width – Evidence of moisture infiltration (staining, soft areas under tile, mold at grout lines) – Tiles that have debonded or lifted For moisture damage specifically — if you find soft drywall adjacent to the shower, staining at the base of shower walls, or mold at grout lines — document extensively before any repair is attempted.

Step 2: Distinguish the Type of Failure

Aesthetic failures (uneven layout, inconsistent grout, visible lippage): Typically addressable with spot repairs or in some cases acceptable to live with. Discuss with the contractor. Workmanship failures (hollow tiles, cracked tiles, debonded tiles): The tile setter’s responsibility under any workmanship warranty. Contact the contractor and request correction. Waterproofing failures (moisture behind tiles, mold, wet walls adjacent to shower): The most serious failure mode. This typically requires complete demolition of the affected area — removing tile, substrate, and any damaged framing — before correct reinstallation. The tile setter’s waterproofing failure is the cause; the remediation cost is the damage.

Step 3: Contact the Contractor in Writing

Close-up of partially tiled wall in a construction area, showcasing incomplete renovation work. Send an email describing: – The specific problem (hollow tiles throughout the shower floor, grout cracking at all inside corners, evidence of moisture behind the shower wall) – When you first noticed it – Your expectation that it’s covered under workmanship warranty – A request for inspection and remediation Give 5–10 business days to respond.

Step 4: Get an Independent Assessment for Significant Failures

For waterproofing failures or significant structural failures, hire an independent tile contractor or building consultant to assess the work. Their written assessment:
  • Documents what was done incorrectly
  • Identifies the appropriate remediation scope
  • Provides an estimated remediation cost
This is the objective evidence for a warranty claim or legal action.

Step 5: File Complaints

Your local consumer protection office (consumerprotectionontario.Ca): For failure to deliver the service as represented. TTMAC (Terrazzo Tile and Marble Association of your country): If the installer is a member, a complaint can be filed through the association. Better Business Bureau: Creates a public record.

Step 6: Small Claims Court

For unresolved disputes under $35,000 in many regions. You’ll need the original contract, warranty document, the independent assessment, photographs, and the remediation cost. For significant waterproofing failures requiring full demolition and reinstallation, the remediation cost can be substantial — consult a lawyer if the amount exceeds the small claims limit.

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