Basement Mold Inspection and Remediation — Syracuse, UT

Loss Type: Mold Remediation / Basement Humidity and Condensation
Location: Syracuse, UT near Antelope Drive
Response Time: Next-day scheduled
Job Duration: 3 days
Insurance: No – homeowner self-pay

The Situation

A homeowner near Antelope Drive in Syracuse, UT contacted us after noticing black spotting along the base of the drywall in their unfinished basement and a musty smell that had developed over the summer months. The basement was used primarily for storage and had no dedicated dehumidification. The homeowner had painted over a small area of visible mold the previous year without success — the growth had returned and spread.

We conducted a professional mold inspection and testing visit the following morning.

The Problem

The basement had no vapor barrier on the concrete slab and the block foundation walls were uninsulated. During summer months warm humid air entering through two operable basement windows was condensing on the cooler concrete and block surfaces, keeping the lower portions of the drywall in a persistently damp state. The relative humidity in the basement had been running consistently above the threshold for mold growth for an extended period.

Visual inspection confirmed mold growth along the base of the drywall on three walls — the two exterior walls and the stairwell wall — covering approximately 80 linear feet at heights ranging from floor level to 14 inches. Moisture readings confirmed the drywall paper was at elevated moisture content across the affected sections. Painting over mold growth without addressing the underlying moisture source had allowed the growth to continue behind the painted surface.

Because the mold had penetrated the drywall paper face in multiple locations, surface treatment alone was not sufficient — affected drywall sections required removal.

What We Did

We established containment at the basement stairwell with 6-mil poly sheeting and ran a HEPA air scrubber throughout the remediation to prevent spore migration to the upper levels of the home. Our mold remediation process followed IICRC S520 standards from containment through clearance. Per that protocol the scope included:

• Removal of drywall to 18 inches above the highest visible mold line on all three affected walls — approximately 120 square feet total
• HEPA vacuuming of all exposed framing, block wall faces, and concrete slab
• Application of EPA-registered antimicrobial to all exposed surfaces
• Application of EPA-registered encapsulant to all treated framing and block wall faces
• Placement of a commercial dehumidifier to bring basement relative humidity to target range
• Post-remediation air sampling by an independent industrial hygienist

We documented the two contributing moisture sources — the uninsulated block walls and the absence of a slab vapor barrier — in our report and recommended the homeowner address both before rebuilding the drywall to prevent recurrence. For a full overview of our mold removal process including containment and disposal protocols, see our mold removal service page.

The Outcome

Post-remediation clearance testing confirmed spore counts within acceptable baseline levels. The homeowner’s contractor subsequently installed rigid foam insulation against the block walls, a 10-mil vapor barrier on the slab, and rebuilt the drywall. A permanent dehumidifier was installed in the basement as part of the rebuild. The musty odor was fully eliminated after the moisture sources were corrected. These steps are exactly what we recommend to prevent mold from returning in basement environments.

“I had painted over that mold myself and thought I fixed it. Upkeep showed me exactly why that doesn’t work and what was actually causing it. They fixed it properly and gave me a report that told my contractor exactly what to do to prevent it coming back. Very glad I called.”

— D. Butterfield, Syracuse UT

If you are dealing with similar humidity issues in the area, see another Syracuse moisture case we handled involving HVAC condensation. We have also handled similar mold scopes throughout Davis County, including mold remediation in a nearby Kaysville home. View all case studies to see more of our work across northern Utah.