Shower Leak Diagnosis & Repair

Service

What Does a Shower Leak Diagnosis & Repair Include?

A shower leak diagnosis and repair is the two-phase scope that finds the actual source of a wet bathroom and fixes the failed component — covering the diagnostic walk (moisture meter readings on the substrate at every reachable point, tap test on every tile in the wet zone, visual inspection of every caulk bead and grout joint, press test on every wall and floor section, photo documentation of every reading) and the repair itself (caulk bead re-bed, grout joint re-seal, single or multi-tile replacement with matched material, backer-board patch with KERDI-Band membrane re-tie, or full affected-wall rebuild with Schluter KERDI sheet). The diagnostic visit is $500 and covers the full walk; the repair is a separate price tier from $800 for a spot caulk-and-tile fix up to $2,500 for a full affected-wall rebuild. Active in-wall plumbing leaks route to a licensed Washington L&I plumber FIRST; Handis returns after their portion closes.

Diagnostic Walk — Moisture Meter, Tap Test, Visual, Press Test

The diagnostic walk is the 45-to-90-minute on-site assessment. Moisture meter (pin-type for direct substrate reading, pinless for non-invasive scanning) on the substrate at the pan-to-wall corners, the tub apron, the toilet base, the wall behind the shower in the adjacent room, and the ceiling below the bathroom in the room directly underneath. Tap test on every tile in the wet zone — a hollow ring at a tile indicates de-bonded substrate, a dull thud indicates wet substrate, a sharp tap indicates dry and bonded. Visual inspection of every caulk bead (looking for bead-pull, mildew, separation), every grout joint (looking for missing grout, cracked grout, color difference indicating water staining), every tile (looking for hairline cracks, chips, missing bullnose). Press test on every wall and floor section we can reach — a finger-press that moves the substrate indicates wet drywall, cement board, or KERDI-Board that has gone wet enough to delaminate. Photo documentation of every reading and finding.

Source Isolation — Caulk, Grout, Tile, Substrate, Membrane, or Plumbing

The diagnostic walk isolates the leak source to one of six categories: failed caulk bead (the most common, especially at the pan-to-wall corner and the tub-to-tile horizontal seam), failed grout joint (usually at a movement joint or a heavy-traffic spot), failed tile (hairline crack, popped tile, missing bullnose at the apron), failed substrate (wet cement board, KERDI-Board, or drywall behind the tile from long-standing seep), failed membrane (un-taped seam at the inside corner, non-bonded drain flange, KERDI sheet that was never installed), or in-wall plumbing (active supply or drain leak inside the wall, hairline copper pinhole, slow drain leak). Categories 1 to 5 are Handis-repair scopes. Category 6 is a licensed Washington L&I plumber call FIRST.

Honest Plumber Routing on Category 6

If the diagnostic walk shows an active in-wall plumbing leak (high moisture meter readings inside the wall that do not match the wet-zone surface findings, water visibly running when the shower is off, a pinhole drip from above the bathroom ceiling, a slow drain leak inside the wall cavity), we stop and route to a licensed Washington L&I plumber as the responsible licensed party for the leak fix. Handis routes to a vetted plumber on the same call, schedules the licensed-sub site visit (usually same-day or next-day on an active leak), and the plumber repairs the supply or drain line. Handis returns for the substrate, membrane, and tile rebuild after the leak fix is signed off and the substrate has dried out (24 to 72 hours of dry-down with a heat-assist dehumidifier where needed). The plumber's invoice is separate from the Handis invoice — both quotes are on the table before any work continues. Plumber coordination is a $250 line item on the Handis invoice (the routing, scheduling, and follow-through).

Repair — Matched Material, KERDI-Band on Membrane Patches

Caulk repair re-beds in 100 percent mildew-resistant silicone after the failed bead is stripped, the substrate is mildew-prepped with a quaternary ammonium cleaner, and the seam is dry to the moisture meter. Grout repair re-seals the affected joint width with sanded or unsanded grout matched to the existing color. Tile repair removes the failed tile without breaking the neighbors (chipping hammer and a tile-removal tool), sets the replacement in fresh thinset matched to the tile type, regrouts and seals. Substrate repair cuts out the wet section, patches with cement board or KERDI-Board sized to the opening, ties into the surrounding membrane with KERDI-Band bedded in thinset. Membrane re-tie opens the suspect inside corner, removes the failed substrate behind, replaces with KERDI-Board, runs new KERDI-Band continuous from the patch onto the surrounding wall membrane. Every patch is photographed and goes in the sign-off file.

Active Drying When the Substrate Is Wet

Wet substrate behind the tile (moisture meter readings above 15 percent on the back side of the substrate) requires active drying before the patch material goes back on. We set a heat-assist dehumidifier inside the opened wall section, run for 24 to 72 hours depending on the saturation level, and re-check the moisture meter every 12 hours. Active drying is a $350 per-day line item — necessary when the substrate is wet, skipped when the meter shows the substrate is already dry. We never close a patch over wet substrate; the patch fails inside six months when we do.