Mold Testing in Alton, IL

Alton fights moisture on two fronts: river humidity in the air and stone foundations in the ground. The limestone and rubble foundations under the city's historic homes in Middletown, Upper Alton, and Christian Hill were never waterproofed, because waterproofing didn't exist when they were laid. They breathe ground moisture continuously, and the humid air off the river makes sure nothing ever fully dries.

A representative Alton job: the owners of an 1890s home notice a white fuzz on furniture and boxes in the basement every summer. That's the visible symptom. The inspection found the stone foundation wicking moisture year round, basement humidity living above 70 percent all summer, and growth established on the wood joists and subfloor above. Air samples confirmed elevated levels. The report gave them a plan: dehumidification sized to the space, remediation of the defined joist areas, and a retest that came back clean.

Our inspection covers what old construction demands: foundation moisture evaluation, humidity measurement, attic and roofline checks where old houses leak quietly, air sampling against an outdoor baseline, and surface sampling of growth. Accredited lab analysis, plain language report.

Call us for seasonal basement mustiness, white or green growth on stored items, plaster staining, symptoms that ease when you leave the house, pre-purchase testing on any historic Alton home, and post-remediation clearance.

We're NORMI certified assessors who work in old buildings constantly, and our results reflect your house, not a sales script.

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