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No, you don’t need to remove the old grout before installing new tile over existing tile. In fact, the old grout helps fill in gaps between tiles, creating a more even surface for the new layer. However, it's important to ensure that the grout is clean, solid, and free of cracks or crumbling areas. Damaged grout should be repaired or replaced before proceeding. Cleaning the surface thoroughly and filling any low spots will help the new adhesive bond properly and ensure a smooth, stable installation.

No, tiling over painted walls or wallpapered surfaces is generally not recommended. Textured surfaces and paints will affect the adhesive, possibly causing tiles to lift or fall off. Painted walls with a semi-gloss or high-gloss finish are particularly difficult for adding tiles. It’s wise to strip the paint first if you install the tiles to drywall, although it’s still best to opt for a cement backer board.

Granite countertops cost an average of $3,250 compared to $2,250 for tile countertops. Granite is also harder to DIY than tile, given its weight and bulk, which increases the overall labor cost of installation. Over time, both types of countertops may need sealing to remain resistant to water, heat, and other common kitchen elements.

You cannot tile directly over hot mop waterproofing because tile requires a smooth, solid surface to adhere properly. Additionally, the shower bed pan needs to be raised and sloped toward the drain to prevent water from pooling. However, you can hot mop and apply a sloped mortar bed over the top (to which the tile can then be adhered).