Yes. Concrete itself is not food, but the dust, dirt, and organic residue on its surface are, and concrete’s real contribution is moisture. Basement slabs and foundation walls wick ground moisture and hold water from past floods far longer than people assume, keeping the surface damp enough to support growth. That is why mold shows up on basement walls, cold rooms, and garage floors in so many Calgary homes.
Mold on concrete is usually a message about moisture: seepage, condensation, or a slab that never fully dried after a water event. Clean the growth and it returns until the moisture does not. Nonstop Restoration reads the slab and walls with moisture meters, finds where the water is coming from, and remediates the mold with the source handled, which is the only version that lasts. Free inspections: (403) 620-8489.