Case Study: Mold caught during home sale inspection

A Chesterfield homeowner was preparing to sell when an unrelated termite inspection turned up something unexpected: signs of possible mold in the basement. For a seller, that's exactly the kind of surprise that can stall a deal—buyers and lenders want it resolved, and they want proof. He called Claro to find out what he was actually dealing with.

Claro performed air testing, and the results confirmed the concern: waterborne mold in the basement with a MoldSCORE of 296 (HIGH range) and 1,700 spores per cubic meter versus 800 outside. The critical finding was the presence of marker molds—the specific types (including Chaetomium at 230 spores) that signal active indoor growth traced to a past water event. This wasn't ordinary household dust—it was a genuine indoor source that needed to be cleared and documented before the sale could move ahead with confidence.

Claro treated the home with its patented dry fogging process, reaching the spores and residue throughout the basement environment rather than just the visible areas. The approach is built to actually clear the air—and to stand up to the retest that a real-estate transaction demands.

Afterward, Claro performed a post-treatment retest through an independent lab. The basement came back at under 13 CFU/m³—no mold colonies detected, the cleanest result a report can show. The homeowner had documented, lab-verified proof of a clean home to hand to buyers and their lenders, backed by Claro's one-year guarantee—and his sale moved forward without the mold becoming a roadblock.