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When choosing tiles for a shower floor, avoid highly porous tile materials, like those with a water absorption rating over 7%. Don’t use non-vitreous tiles, or tiles fired at low temperatures, because they will absorb more water. If you use a highly porous tile in the shower, the tiles can wear down faster, meaning they’ll need to be replaced much sooner.

Yes, you can tile over existing shower tiles, but it's better to remove the old tiles first for the best results. Tiling over existing tiles requires a clean, level surface and proper adhesion. If the old tiles are in good condition, you can roughen the surface to improve adhesion. However, removing the old tiles ensures a smoother, longer-lasting finish and prevents potential issues down the line.

The best bathroom floor tiles are strong enough to withstand the weight of a clawfoot tub. However, professional tile installation is essential. If the tiles are uneven or improperly fixed, they may crack under the pressure. Be careful when installing the tub—if it drops or drags on the tiles, it could easily cause scratches or cracks.

Many homeowners have successfully retiled a bathroom themselves. It can be a challenging but rewarding process, but it’s best for someone who already has at least intermediate DIY skills.