No, you cannot put thinset over painted drywall. The paint creates a weak bond, preventing proper adhesion of the thinset to the drywall. This will lead to the thinset failing and potentially the tiles detaching. The painted surface must be removed for a successful installation.
Yes, you can paint over thinset mortar, but proper preparation is key for a durable finish. Ensure the thinset is fully cured, clean, and free of dust or debris. A good quality primer designed for masonry or concrete surfaces should be applied first. Then, you can use a suitable floor or wall paint, depending on the location and expected wear.
Tiling directly onto plywood is generally not recommended for long-term durability, especially in wet areas. Plywood can expand and contract with moisture, leading to cracked grout and loose tiles. It's best to install a cement backer board over the plywood first, which provides a stable, water-resistant substrate for tiling. This ensures a more robust and lasting installation.
The choice between sanded and unsanded grout depends on the width of your grout lines. Use sanded grout for wider joints, typically 1/8 inch or more, as the sand provides strength and prevents shrinkage. Unsanded grout is suitable for narrower joints, less than 1/8 inch, and for highly polished or delicate tiles that could be scratched by sand. Always check tile manufacturer recommendations.
The best way to clean grout lines involves a combination of methods. Start with a paste of baking soda and water, applied with a stiff brush. For tougher stains, a mixture of vinegar and water can be effective, but avoid using it on natural stone. For very stubborn dirt, a commercial grout cleaner or a steam cleaner can provide excellent results, restoring the original look.
No, you should not use regular caulk instead of grout for tiling. Grout is designed to fill the spaces between tiles, providing structural integrity and resistance to moisture. Caulk is flexible and used for expansion joints or where different surfaces meet. Using caulk for all grout lines will result in a soft, easily damaged, and less durable surface that won't hold up over time.
The curing time for thinset before grouting typically ranges from 24 to 48 hours, but it can vary significantly based on the specific product, temperature, humidity, and tile type. Always refer to the thinset manufacturer's instructions for the precise recommended curing period. Rushing the process can lead to moisture being trapped, affecting grout adhesion and overall tile integrity.
Yes, it is highly recommended to seal most types of grout after installation, especially cement-based grouts. Sealing helps protect the grout from stains, moisture, and mildew, making it easier to clean and extending its lifespan. Natural stone tiles also require sealing. Epoxy or urethane grouts are typically stain-resistant and may not require sealing, but always check the product specifications.
Tiling over existing tiles is possible in some situations, but it's not always the best approach. The existing tiles must be perfectly sound, clean, and well-adhered to the subfloor. Any loose or damaged tiles must be removed. The surface will also need to be properly prepared, often requiring a bonding primer. However, it will raise the floor height and potentially cause issues with doors or appliances.
Several factors can cause tiles to crack after installation. Common culprits include an unstable subfloor, insufficient thinset coverage (leaving voids), improper substrate preparation, or excessive movement in the underlying structure. Thermal expansion and contraction, heavy impacts, or using the wrong type of tile for the application can also lead to cracking. Proper installation techniques are crucial for preventing this issue.