Tiling is a crucial part of any renovation, and once problems arise, fixing them can be costly, time-consuming, and troublesome. On the construction site, if you hear these phrases, be on high alert—they’re often signs of trouble ahead. Knowing the 8 most dreaded things to hear from a tiler in advance can save you a lot of headaches!

1.Bathroom floor slope should be reserved slightly larger.

The reason for reserving a slightly larger slope in the bathroom floor is mainly to ensure smooth drainage, prevent water accumulation, and reduce odors. Specifically:

1. Faster drainage: A steeper slope allows water to flow more quickly, ensuring efficient drainage and avoiding stagnation.

2. Prevent water pooling: Adequate slope helps water quickly flow toward the drain, reducing the risk of water accumulation and slips.

3. Reduce odor backflow: Proper slope and drainage effectively prevent sewer gas from coming back into the bathroom.

4. Improve comfort: A dry floor environment makes the bathroom cleaner and more comfortable to use.

5. Prevent pipe blockages: A reasonable slope prevents wastewater backflow and pipe clogging.

Generally, the recommended floor slope for bathrooms is 2% to 3% (meaning a 2 to 3 cm height difference per meter). If conditions allow, a slightly larger slope is safer and more reliable.

2.Use a U-shaped floor drain

The main reasons for using a P-trap (U-shaped) floor drain are:

1. Odor prevention: The water seal design effectively blocks sewer gases from entering indoor spaces.

2. Clog prevention: The curved design reduces the chance of debris entering the drainage pipes, lowering the risk of blockage.

3. Smooth drainage: The properly designed bend ensures smooth water flow and prevents water accumulation.

4. Easy cleaning and maintenance: The simple structure allows for easy disassembly and cleaning, keeping the drainage system hygienic.

5. Pest prevention: The water seal also blocks insects and pests from coming through the drainage system.

3.Before tiling, wrap the drainage pipes with soundproof insulation.

Before tiling, wrapping the drainage pipes with soundproof cotton is mainly to reduce noise during drainage and improve living comfort. The specific reasons include:

1. Reduce water flow and impact noise: Soundproof cotton effectively absorbs the noise caused by water flow and objects hitting the pipes.

2. Prevent noise transmission: The soundproof material blocks noise from spreading through walls and floors, avoiding disturbance.

3. Enhance overall sound insulation: Works together with other soundproofing measures in walls and floors to create a quieter living environment.

4. Protect pipes: The soundproof cotton also provides cushioning to prevent damage caused by pipe vibrations.

4.Full-house seamless flooring

Refers to flooring installation throughout an entire room or even the entire home using the same type of tile or flooring material, with no visible joints, transitions, or thresholds.

The installation emphasizes overall visual continuity, making the space appear more spacious and unified.

This approach typically requires higher construction standards and more precise measurements and installation.

It enhances the overall aesthetic and spatial integrity, making it ideal for homeowners who pursue high-end design.

False Seamless Flooring

Although it appears to be a continuous surface, hidden joints or segmented areas actually exist.

It may involve materials from different batches or sizes, resulting in color inconsistencies or height differences.

The construction cost is lower, and the installation process is simpler.

However, the visual effect is less natural compared to true seamless flooring, and the sense of continuity across the space is weaker.

5.Buy a check valve

Why You Should Buy a Check Valve (Backflow Preventer)

1. Odor Prevention
   Prevents unpleasant sewer smells from flowing back into your home — especially useful in bathrooms, kitchens, and balconies.

2. Stops Sewage Backflow
   In cases of heavy rain or clogged drainage systems, it helps stop wastewater from backing up into indoor spaces.

3. Blocks Insects and Rodents
   Effectively keeps pests like cockroaches, insects, and even rats from entering through the drainpipes.

4. Improves Living Comfort
   Keeps indoor air fresh, eliminates foul odors, and enhances the overall quality of life.

5. Protects Home Structure
   Prevents backflow from causing moisture, mold, or damage to flooring and walls.

6. Low Cost, High Impact
   Easy to install and affordable, it’s a small investment that brings long-term protection and peace of mind.

6.The bathroom should use a wall-over-floor tiling method

(and don’t forget to leave a gap, or the grout won’t be able to fill it properly).

Why Bathroom Wall Tiles Should Overlap Floor Tiles (“Wall Over Floor” Tiling)

1. Better Waterproofing
   When the wall tile overlaps the edge of the floor tile, it creates a natural slope for water to flow down into the drain, preventing water seepage and improving overall waterproof performance.

2. Prevents Dirt and Mold
   Floor-over-wall tiling often leaves gaps that trap dirt, moisture, and can lead to mold or odors. Wall-over-floor tiling results in tighter joints and easier cleaning.

3. Cleaner, More Seamless Look
   Visually, the wall tile covers the edge of the floor tile, creating smoother transitions and a more refined, finished appearance.

4. Aligns with Proper Construction Workflow
   Installing floor tiles first allows for better height control when tiling the walls, leading to more precise and professional alignment.

5. Reduces Risk of Cracks
   Since floor tiles bear more load, overlapping them with wall tiles adds stability and helps prevent edge cracking or tile lifting over time.

7.Arrange in advance for the factory to process the wall tile corners into curved (Haitang) edges.

（If processed on-site by the workers, the cost will be higher.）

Why Use a Curved Tile Corner (Haitang Corner)

1. Safer and Less Prone to Injury
   The curved edge design replaces sharp 90-degree corners, reducing the risk of accidental bumps or injuries—especially important for homes with children or elderly family members.

2. Softer and More Elegant Appearance
   The arc-shaped transition looks smoother and more natural than harsh right angles, creating a warmer and more harmonious atmosphere in the space.

3. Better Durability and Craftsmanship
   It avoids using metal trims that may deform or rust over time. The tiles fit together more tightly, making them less likely to chip or crack at the corners.

4. Enhanced Aesthetic Quality
   Haitang corners are often found in mid-to-high-end custom interiors, showcasing a higher level of craftsmanship and refined taste.

5. Easier to Clean
   The rounded corners eliminate hard-to-reach gaps, making daily cleaning simpler and more efficient.

8.Roughen the surface before installing wall tiles.

The reason for roughening the surface before installing wall tiles is mainly to enhance the adhesion between the tiles and the adhesive, ensuring the tiles are firmly fixed and preventing detachment. Specific reasons include:

1. Increase surface roughness
   Roughening creates more texture on the tile back, improving mechanical interlocking.

2. Improve bonding strength
   The adhesive can better penetrate the tiny pores on the roughened surface, forming a stronger bond.

3. Prevent hollowing and detachment
   Roughening helps avoid issues like hollow spots and tile falling caused by poor adhesion.

4. Enhance construction safety and durability
   Ensures long-term stability of wall finishes, reducing damage from time or external forces.

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