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Glazed ceramic tiles don’t need to be sealed because the glazing already offers some protection against moisture. Unglazed ceramic tiles need to be sealed to keep the porous tile safe from moisture and staining. However, both types of tile can benefit from sealing. Sealant can make the tiles easier to keep clean and offer more resistance to water, spills, and stains.

Yes, you can install a backsplash directly onto drywall, provided the wall is properly prepped, clean, and dry. For best results, especially in kitchen areas, your walls should be made of moisture-resistant drywall, often called green board. If your current wall isn't moisture-resistant, it's recommended to replace it before installing the backsplash. For even greater protection against water damage, you can remove the existing drywall and install a tile backer board or cement board instead. While properly installed standard drywall is typically strong enough to support a backsplash, some local building codes may require water-resistant materials in kitchen areas, so it's a good idea to check.

Add a T-shaped spacer to each corner of a tile when placing it. You’ll want to nudge the tiles closer together so the spacers are touching each corner. When you’re done installing your tile, you can remove each spacer, wash them, and use them for your next project.

Tile countertops can last up to 100 years when properly maintained. Ceramic and porcelain tiles are the most durable types and can last as long as natural stone countertops like granite, marble, and quartz. Tile countertops are much cheaper than natural stone countertops, making them an excellent option for a homeowner with a limited budget.