Tequesta Window and Plumbing Leak
- kevanmackie3
- 2 days ago
- 2 min read
Overview
A residence reported moisture developing inside a wall in the TV area, positioned adjacent to a bathroom. The homeowner was unsure whether the moisture originated from plumbing, exterior intrusion, or another source. Southeastern Leak Detection & Repair was requested to perform a full diagnostic inspection, including pressure testing, plumbing access, drain evaluation, and moisture mapping.
Challenge
The moisture appeared in a location influenced by multiple potential sources: bathroom supply lines, bathroom drain lines, and a nearby window. Initial pressure testing showed only a minimal pressure drop—small enough to be mistaken for fixture seepage—making the leak difficult to isolate. Additionally, the moisture pattern suggested both plumbing and possible exterior intrusion, requiring a multi‑layered diagnostic approach.
Inspection Process
Pressure Testing: Conducted a whole‑home pressure test and observed an extremely small pressure drop. Initially suspected a minor faucet leak due to the minimal rate of loss.
Drywall Access & Plumbing Inspection: Cut access openings in the affected wall to inspect:
2" drains serving the downstairs bathroom
3" drain stack serving the upstairs bathroom All drain lines were dry and functioning normally.
Moisture Mapping: Took moisture readings behind the couch near a window. Elevated moisture levels were detected beneath the window area.
Water Intrusion Testing: Cut drywall under the window and performed a controlled water intrusion test. Water penetration was confirmed.
Additional Plumbing Access: Cut a second drywall section near the bathroom supply lines. Located an extremely small pinhole leak in the cold‑water supply line feeding the bathroom vanity.
Findings
Drain lines were dry and not contributing to moisture.
Elevated moisture beneath the window confirmed exterior water intrusion.
A pinhole leak was discovered in the cold‑water supply line feeding the bathroom sink.
The combination of exterior intrusion and a micro‑leak in the supply line contributed to moisture in the TV area wall.
Recommended Next Steps
Exterior Waterproofing: Address the window intrusion through sealing, stucco repair, or exterior envelope remediation.
Interior Remediation: Remove affected drywall, dry the wall cavity, and treat any areas impacted by moisture.
Monitoring: Continue monitoring the area for any new moisture after repairs to ensure no additional plumbing issues develop.
Repair Process
Removed the damaged section of ½" copper supply line.
Installed new ½" copper sweat piping to replace the compromised portion.
Re‑pressurized the system and verified all joints were holding with no active leaks.
Confirmed plumbing system stability following repair.
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