Cost to Remove Sewage-Contaminated Flooring in 2025

Sealed tile or vinyl plank over a slab can sometimes be cleaned and kept if contamination never breached the seams and the slab beneath tested dry after extraction, because there's no porous material underneath to hold contamination. The same tile installed over a wood subfloor with any water infiltration at the seams is a different case entirely, since plywood or OSB subfloor absorbs and holds contamination that no surface cleaning reaches, and the flooring above it has to come up to treat the subfloor regardless of how clean the tile itself looks. Carpet and pad over any subfloor is close to an automatic total loss under Category 3 contamination, since padding cannot be decontaminated and carpet fiber traps pathogens surface cleaning cannot reach.

Solid hardwood that has cupped, crowned, or separated at the seams after sewage exposure is both a contamination risk and a structural one, since warped boards rarely lie flat again even after drying, and refinishing cannot fix wood that absorbed contamination at the tongue-and-groove joints. Engineered hardwood with a thin veneer layer over plywood core fails faster and more permanently than solid wood, since the plywood core delaminates when saturated, and that failure is often irreversible even if the surface looks intact days after the event.