Mold & mildew on slate appear as dark gray, black, or greenish discoloration, typically in damp or shaded areas. Because slate has natural texture and layered structure, moisture and organic buildup can create conditions where biological growth develops. What’s Happening Slate is a metamorphic stone with a cleft, textured surface and natural layering. While the stone…
Mold & mildew on quartzite appear as dark gray, black, or greenish discoloration in damp or poorly ventilated areas. While quartzite itself does not support mold growth, moisture and organic residue on the surface can create conditions where mold or mildew develop. What’s Happening Quartzite is a dense natural stone, but it can still retain surface…
Mold & mildew on grout appear as dark gray, black, or greenish discoloration along grout lines. Because grout is porous and often exposed to moisture, it is especially vulnerable to biological growth in damp environments. What’s Happening Grout is a cement-based material with an open pore structure. In areas with frequent moisture exposure — such as…
Mold & mildew on concrete appear as dark gray, black, or greenish discoloration in damp or shaded environments. While concrete itself does not feed mold, moisture and organic debris on the surface can create conditions where growth develops. What’s Happening Concrete is porous and can retain moisture, especially in exterior, below-grade, or poorly ventilated areas. Mold…
Mold & mildew on terrazzo appear as dark gray, black, or greenish discoloration in damp or humid environments. While terrazzo itself does not support mold growth, moisture and organic residue on or within the binder can create conditions where biological growth develops. What’s Happening Terrazzo consists of decorative aggregate embedded in either a cement-based or epoxy…
Mold & mildew on limestone typically appear as dark gray, black, or greenish patches in damp or humid environments. While limestone itself does not grow mold, moisture and organic residue on its porous surface can create conditions where biological growth develops. What’s Happening Limestone is a porous, calcium-based natural stone that readily absorbs moisture. In areas…
Mold & mildew on granite typically appear as dark spots, shadowy patches, or surface discoloration in damp environments. While granite itself does not support mold growth, organic residue and trapped moisture on the surface can create conditions where mold or mildew develop. What’s Happening Granite is a dense natural stone, but it is not completely non-porous….
Mold & mildew on travertine is usually a sign that moisture is lingering on or inside the stone—often in tiny pores, holes, grout lines, or around shower edges. It can show up as dark spots, smudgy patches, or a “musty” look that keeps returning even after cleaning. What’s Happening Travertine is a porous natural stone. Even…
Mold and mildew on marble typically appear as dark, greenish, or black patches caused by moisture exposure. These growths develop in damp environments where organic material and humidity create favorable conditions. What’s Happening Mold and mildew are forms of fungal growth that thrive in moist environments. While marble itself is inorganic, dirt, dust, soap residue,…