Mold Testing Services in Webster Groves, MO

Century-old Webster Groves homes manage moisture the way they were designed to: by breathing. Plaster walls, stone and brick foundations, and old-growth framing absorb and release humidity constantly, and they did it successfully for a hundred years. Problems start when modern updates interrupt the design: insulation added to walls that need airflow, vinyl windows sealing rooms that used to leak air on purpose, finished basements wrapping damp stone in drywall.

Here's the Webster Groves scenario. Homeowners renovate a 1915 four square, tightening it up beautifully, and within two winters they have condensation on upstairs walls and a musty smell in a closet against an exterior wall. The house was breathing through that wall for a century, and now the moisture stops inside it. Sampling confirmed growth in the closet wall cavity, and the report gave them a fix that respected the house: targeted remediation, humidity management, and ventilation adjustments instead of more sealing.

Our inspection understands old construction: moisture behavior in plaster and masonry, attic and roofline evaluation, foundation moisture assessment, air samples against an outdoor baseline, and surface sampling. Accredited lab analysis, plain language report.

Test when older homes develop new condensation or odors after renovations, for basement and attic concerns, before buying any century home, when symptoms track with the house, and after remediation.

We're NORMI certified and we work in old housing stock every week; we know the difference between a house being old and a house being sick.

Call (618) 477-2761 to schedule mold testing in Webster Groves.