Case Study: 1908 Joaquin Bungalow — Galvanized Supply Failure

Property: 1908 Craftsman bungalow, 400 block East 400 North, Joaquin neighborhood, Provo
Loss Date: February 14, 2024 — 6:47 AM
Loss Category: IICRC S500 Category 1 (clean water)
Loss Class: Class 3 (large affected area, ceiling and wall involvement)
Response Time: 15 minutes from dispatch confirmation to on-site arrival
Total Restoration Timeline: 21 days from initial response to full occupancy
Insurance Carrier: State Farm HO-3 policy
Final Xactimate Scope: $47,180

The Loss Event

The property owners returned home from an overnight trip to find water dripping from the dining room ceiling and pooling on the hardwood floor below. The dining room ceiling had a visible bulge approximately 18 inches across at the point where the drip line concentrated. The owners had killed the water main at the street valve before calling us — the correct first move — but were uncertain about the source location.

The property is a 1908 Craftsman bungalow on a small city lot, roughly 1,850 square feet across two stories plus an unfinished basement. Original galvanized steel supply lines throughout, cast-iron drain, lath-and-plaster interior walls in nearly all rooms, plank subfloor over dimensional joists, balloon-framed exterior walls (studs running full height from foundation sill to roof plate with no fire blocking between floors). The house is on the Provo City Historic Register and falls within the National Register-eligible Joaquin district.

Diagnostic Sequence

On arrival at 7:02 AM (15 minutes after dispatch), we opened by photographing the visible damage and the mechanical room condition before touching anything. Standard first-15-minute documentation: source location assessment, moisture readings at grid coordinates, category assignment, safety walk-through.

The ceiling bulge suggested a source directly above the dining room, but Joaquin’s balloon-frame construction meant the actual failure could be anywhere on the vertical wall run from foundation to attic. Rather than cutting the ceiling drywall (which turned out to be original plaster with a later drywall patch), we ran a FLIR E75 thermal survey across all four dining room walls and the second-floor bathroom directly above.

Thermal showed a vertical linear cold signature running from the second-floor bathroom’s toilet supply-line location, down through the exterior north wall cavity, terminating at a horizontal spread pattern above the dining room ceiling. Balloon-framing had allowed the water to travel two full floors through the wall cavity before ponding at the top plate of the first-floor exterior wall and then dripping through the dining room ceiling.

Delmhorst BD-2100 pin meter readings confirmed the thermal findings:

Second-floor bathroom north wall (source area)

Framing at 42% MC, drywall paper at 8% (heavy saturation)

North wall cavity, second floor (mid-path)

Framing at 34% MC via extension probe through wall port

North wall cavity, first floor (mid-path)

Framing at 28% MC via extension probe through wall port

Dining room ceiling top plate (terminus)

Framing at 38% MC, plaster surface at 6% moisture content

Dining room hardwood floor (pooled water)

Solid oak flooring at 22% MC across affected area

Isolated the plumbing at the second-floor bathroom shutoff to confirm source: pinhole failure at a galvanized fitting behind the toilet, water pressure had been forcing water out at approximately 0.3 GPM for what turned out to be approximately 4 hours during the overnight period.

Category and Class Assignment

Category 1 clean water (municipal supply, no contamination). Class 3 loss (large affected area, ceiling and wall involvement across two floors). IICRC S500 protocols for Category 1 Class 3: full extraction of standing water, structural drying with LGR dehumidification, cavity ventilation through drilled ports, monitoring at 12-hour intervals, restoration to drying goals of 12% MC on framing, 1% MC on plaster paper facing (adjusted target: 3% for plaster body given material), 8% MC on solid hardwood.

Equipment Deployment

Deployed by 7:45 AM (60 minutes after arrival):

Truck-mounted extraction unit

Removed approximately 8 gallons of standing water from dining room hardwood floor. First-pass surface extraction completed in 12 minutes.

Phoenix R150 LGR dehumidifiers (2 units)

Deployed one in dining room, one in second-floor bathroom. 130 pints per day AHAM output each.

Phoenix Focus air movers (6 units)

Directed airflow across affected surfaces and through drilled cavity ventilation ports at north wall base plates on both floors.

Novatek NA-1500 HEPA scrubber

Deployed in dining room for particulate management during plaster inspection work.

Kestrel 5500 psychrometer

Baseline ambient readings: dining room 68°F, 55% RH, 74 GPP. Second-floor bathroom 66°F, 58% RH, 76 GPP.

Total equipment load: 24 amps at 120V, distributed across three dedicated circuits (verified panel capacity before deployment).

Drying Progress

Monitoring at 12-hour intervals per IICRC S500 protocol:

Day 1 (baseline, 8:00 AM Feb 14)

Framing 42% (source), 34-38% (mid-path), 22% (hardwood). Plaster 6% surface.

Day 2 (8:00 AM Feb 15)

Framing 32% (source), 26-30% (mid-path), 18% (hardwood). Plaster 4% surface.

Day 3 (8:00 AM Feb 16)

Framing 24% (source), 20-24% (mid-path), 14% (hardwood). Plaster 3.5% surface.

Day 4 (8:00 AM Feb 17)

Framing 18% (source), 16-19% (mid-path), 11% (hardwood). Plaster 3% surface.

Day 5 (8:00 AM Feb 18)

Framing 14% (source), 13-14% (mid-path), 9% (hardwood). Plaster 3% surface.

Day 6 (8:00 AM Feb 19)

Framing 12% throughout, 8% (hardwood). Plaster 3% surface. Drying goals met on framing and hardwood. Plaster goal met (3% target for plaster body).

Day 7 (8:00 AM Feb 20)

Three consecutive readings at drying goal confirmed. Equipment pulled.

Total drying period: 7 days. Plaster body drying took the full 7 days despite framing reaching goal at day 6 — this is typical for lath-and-plaster construction and the reason we extend monitoring in Joaquin work rather than pulling equipment at day 5 the way we would in drywall construction.

Reconstruction Scope

The reconstruction phase required EPA RRP lead-safe work practices under 40 CFR 745 given the pre-1978 construction. All demolition happened under 6-mil poly containment with HEPA vacuum cleanup and dust suppression throughout. Every tech on-site carried individual EPA RRP renovator certification; the firm certification was documented in the initial scope submission.

Second-floor bathroom north wall

Drywall patch (installed during 1980s remodel) removed to allow galvanized fitting replacement by licensed plumber. Plaster in adjacent original areas preserved. Drywall patch replaced.

Dining room ceiling

Original plaster ceiling repaired using traditional three-coat plaster technique (scratch, brown, and finish coats) with lime and gypsum finish to match existing texture. No drywall replacement — homeowner strongly preferred period-appropriate matching, and the loss of the plaster patch during removal was minor.

Dining room hardwood floor

Solid oak (original 1908) at 8% MC after drying showed cupping across the affected area. Sanded and refinished in situ rather than replaced. Final finish matched adjacent unaffected areas.

Dining room paint and moldings

Water-stained crown molding stripped and refinished. Original 1908 casings preserved. Ceiling and wall paint refreshed in adjacent affected areas.

Insurance Coordination

State Farm HO-3 policy, $2,500 deductible. Adjuster assigned within 12 hours of initial claim submission. Documentation submitted to the adjuster:

• Full-resolution photo series with EXIF timestamps (147 photos through the loss and restoration)
• Gridded moisture map with 12-hour interval logs through drying period
• Category and class determination with IICRC S500 citation
• Equipment inventory with model and serial numbers
• EPA RRP firm certification and individual renovator certifications
• Plaster restoration matching documentation (three-coat traditional technique, sample photos of match to adjacent original)
• Xactimate-native scope submitted in initial dispatch documentation

Initial Xactimate scope: $47,180. Adjuster reviewed on-site at day 3 of drying. No scope adjustments were made — full scope approved as submitted. Homeowner responsibility limited to the $2,500 deductible.

Outcome

Full restoration completed 21 days after initial loss response — 6 days ahead of the initial 4-week estimate. Homeowners moved back into full-house occupancy on March 6, 2024. Historic finishes preserved throughout — original plaster texture matched, original hardwood refinished rather than replaced, original crown molding retained. No mold development during or after restoration (verified with post-restoration air sampling per homeowner request). No repeat failures on the affected supply line (the plumber replaced the entire second-floor bathroom galvanized run with PEX during the restoration, but did not do a whole-house re-pipe — that discussion remains open with the homeowner).

Key Learnings

• FLIR thermal imaging on balloon-framed walls before cutting anything saved substantial unnecessary demolition and matched period-appropriate finishes better than exploratory drywall removal would have
• Extended plaster drying monitoring (7 days vs. the 5-day drywall standard) prevented premature equipment removal and repeat drying deployment
• Traditional three-coat plaster restoration matched the original 1908 texture in a way modern drywall veneer plaster would not have
• State Farm’s documentation preferences run well to detailed initial submission — the up-front documentation quality prevented scope disputes during the review process
• Galvanized supply-line failure in a 1908 Joaquin home is routine; the diagnostic and restoration approach for this construction generation should be treated as standard practice rather than specialty work

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Contact Vault Mold Removal

Phone: (385) 250-2825
Address: 1169 S 760 W, Provo, UT 84601
Hours: Monday–Saturday, 9:00 AM – 5:00 PM
Service Area: Joaquin, all Provo neighborhoods, and surrounding Utah County communities.