Q. I spilled some coffee on my tile, and it won’t come off. I tried floor cleaning solution, vinegar and water, vinegar and baking soda, watered bleach, and hydrogen peroxide. Nothing seems to work. I am pretty sure it is porcelain tile.  A.... Read More

Q. Grey grout stain has penetrated the surface of some of the ceramic wall tiles in our bathroom. It’s been a few weeks now, and I’ve tried scrubbing with water and a mild cleaner, but the stain is still there. Is it possible to remove... Read More

Q. We grouted our beautifully installed marble backsplash with a gray grout without sealing the marble first. Unfortunately, the marble—which was originally white has now turned grey. It seems the grout has discolored the surface. Is there... Read More

Q: We are building a new house in South Louisiana. We have a concrete slab with concrete piers on top. My tile installer used a polyethylene membrane with thinset directly over the plywood subfloor. We installed a honed limestone tile. Now that... Read More

Q. I have a shower floor that has small stones of different colors and it is yellowing in 3 places. This started right after it was installed. Someone told me it was iron in water. How do I get rid of the yellowing? It‘s in the grout and on the... Read More