When renovating a bathroom, many homeowners end up tearing out the original wall tiles and laying new ones. This process often requires reapplying waterproofing to the walls. If the waterproofing is not done properly, water leaks can occur, leading to stains on the ceiling of the room below or even severe damage to your home and your neighbors' property.
Today, there are numerous waterproofing materials available, and most provide good protection. However, it's crucial to pay attention to the details during installation to ensure long-term effectiveness.
First, the bathroom floor must be properly leveled. If you're replacing the floor tiles, after removing the old ones, use cement mortar to level the surface before applying waterproofing. This helps prevent uneven thickness that could lead to leaks in the coating.
Second, special attention should be given to the seams. The areas where the wall meets the floor, as well as around pipes and drains, are common trouble spots. Make sure the workers carefully apply waterproofing to these corners and edges—every joint needs to be fully covered.
Third, proper treatment of the walls is essential. Typically, the walls should be coated with waterproofing material up to about 30 cm high to prevent moisture from seeping through. But if the wall is a non-load-bearing lightweight wall, it’s best to cover the entire surface. If you have a two-piece shower enclosure, both adjacent walls should be fully painted. For bathtubs, the wall next to the tub should have waterproofing extending above the rim for extra protection.
Fourth, always conduct a proper waterproofing test. After the work is complete, block all the water in the bathroom and build a small barrier at the door. Pour about 20 cm of water into the room and let it sit for 24 hours. Then, check the walls and floor for any signs of leakage. This 24-hour test is critical for ensuring the quality of the waterproofing project.
Lastly, make sure all drainage systems remain clear. Keep floor drains, plumbing vents, and other fixtures open to avoid clogs that could lead to water buildup and potential damage.
Proper planning and attention to detail during the waterproofing process can save you from costly repairs down the line. Always choose quality materials and hire experienced professionals to handle the job. With the right approach, your bathroom will stay dry and protected for years to come.
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