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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.

If you hire a professional to lay tile, you can expect to pay $3 to $15 per square foot for labor. For a 100-square-foot tiling project, that would equal $30 to $150 in labor. These costs may increase if you need extra services (such as tile removal, wall repair, or waterproofing). For example, tile removal costs an additional $2 to $7 per square foot.

On average, tiling a shower costs between $1,800 and $5,000, with most people paying around $2,700. The price of this project depends on multiple factors, including the kind of tile you choose, the size of your shower, and labor rates in your area. If you decide to tile your own shower (instead of hiring a professional), it’ll likely cost $800 to $1,400.

Porcelain is a relatively affordable, mid-range countertop material. It typically costs between $50 to $70 per square foot.

Compared to quartz, porcelain is slightly more affordable, as quartz generally ranges from $50 to $200 per square foot. However, lower-quality, builder's grade quartz can be similar in price to porcelain.

Compared to granite, the price can be similar, depending on the quality of the stone. While granite slabs can range from $50 to $200 per square foot, you can find lower-end granite in the same price range as porcelain. High-end granites will cost significantly more.

Porcelain is generally more expensive than laminate, acrylic, and ceramic, but less expensive than high-end slate, concrete, and marble. A key benefit is that porcelain does not require sealing, which reduces long-term maintenance costs.