Decoration skills: sunken bathroom waterproof once and for all
In order to meet the growing demand for a more humanized living experience, many modern homes are designed with sunken bathrooms. These layouts offer greater flexibility in arranging bathroom fixtures and provide easier drainage. Additionally, if there is no construction below the floor, the noise from bathroom activities can be significantly reduced. However, sunken bathrooms also come with their own set of challenges, particularly when it comes to waterproofing. Today, we’ll explore effective techniques to ensure your sunken bathroom is waterproof for good.
**Tips for Waterproofing a Sunken Bathroom**
To help you tackle the common issue of water leakage in sunken bathrooms, we’ll break it down into three key areas.
First, it’s essential to know when the best time is to apply waterproofing. Ideally, you should do it after the backfilling process is complete. However, if possible, it's better to apply waterproofing once before backfilling and then again after. If the developer has already done the waterproofing, it's still recommended to redo it. This is because during plumbing renovations, the existing waterproof layer can easily be damaged. Doing it yourself ensures better protection.
Second, choosing the right material for backfilling is crucial. Avoid using slag or other debris, as they can create uneven surfaces and lead to cracks or even structural damage over time. Instead, opt for materials like expanded clay or coal ash, which are lightweight, moisture-absorbent, and less likely to cause issues. These materials not only reduce pressure on the floor but also help manage moisture effectively.
Third, many homeowners are concerned about how to achieve long-lasting waterproofing. The saying goes, “Three parts materials, seven parts workmanship.†So, it's not just about using high-quality waterproofing products, but also about proper installation. In wet areas like bathrooms, a mortar-based waterproofing agent works well. For walls, especially near cabinets, it's advisable to fully coat up to 1.8 meters in height.
**Proper Filling Method for a Sunken Toilet**
Step 1: Apply two layers of waterproof coating. Make sure both layers extend up the walls, at least 40 cm above the sunken area. This prevents water from spreading laterally and ensures it drains properly.
Step 2: Use red bricks or concrete to divide the sunken area into grids of approximately 400x400 mm. This step is often overlooked but plays a critical role in preventing future sinking or cracking.
Step 3: Fill the grid with moisture-resistant materials like expanded clay or coal ash. No need to compress them too much—since they’re not load-bearing, their main purpose is to absorb excess moisture.
Step 4: Lay a steel mesh reinforcement over the grid. A 200x200 mm square mesh made of 5mm diameter bars will help distribute weight evenly and prevent cracks.
Step 5: Pour a 40mm thick C25 fine gravel concrete layer. Slope it appropriately and apply two coats of waterproofing. After the waterproofing dries, apply a thin layer of cement slurry to protect it from scratches during tiling. Once that’s dry, you can proceed with laying tiles.
In addition to waterproofing, renovating a sunken bathroom requires careful attention to materials and construction quality. Choosing reliable suppliers and experienced professionals is just as important as the techniques used. With proper planning, quality materials, and skilled execution, your sunken bathroom can remain leak-free for years to come.
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