Although the bathroom is small, it’s one of the most frequently used spaces in any home—and also the easiest to go wrong.Water leaks, odors, mold, poor drainage… A single mistake during renovation can cause years of frustration.
Here are 10 common bathroom renovation mistakes and how to avoid them 👇

1️⃣ Poor Waterproofing

Waterproofing isn’t just for the floor—the walls (up to 1.8m high) need protection too.
💡 Tips:

• Use premium waterproof coatings and apply two cross layers.

• Always perform a 48-hour water test before tiling.

2️⃣ Wrong Drain Position

If your floor doesn’t slope correctly toward the drain, you’ll end up with standing water and bad smells.
💡 Tips:

• Maintain a 1–2% slope toward the drain.

• Use separate drains for the shower and dry areas.

• Choose a drain with a built-in odor trap.

3️⃣ No Wet & Dry Separation

Without separation, humidity spreads everywhere, causing slippery floors and moldy walls.
💡 Tips:

• Use glass partitions or shower curtains in small bathrooms.

• For larger bathrooms, design independent dry and wet zones.

• Add a good ventilation fan to reduce moisture.

4️⃣ Poor Lighting Design

One ceiling light isn’t enough!
💡 Tips:

• Combine ceiling light + mirror light for even brightness.

• Use waterproof fixtures (IP44 or above).

• Keep light color temperature around 4000K for comfort.

5️⃣ Unsafe or Messy Wiring

Bad electrical work in a wet environment can be dangerous.
💡 Tips:

• Use waterproof conduits and splash-proof outlets.

• Separate hot and cold water lines.

• Reserve power sockets for heater, toilet, or washing machine.

6️⃣ Not Enough Storage

A tidy bathroom needs smart storage.
💡 Tips:

• Use wall-mounted cabinets or recessed shelves.

• Opt for PVC or aluminum cabinets—moisture-resistant and durable.

7️⃣ Poor Ventilation

Without airflow, bathrooms smell bad and mold quickly.
💡 Tips:

• Install a high-power exhaust fan or smart dehumidifier.

• If your bathroom has no window, keep the exhaust on regularly.

8️⃣ Bad Toilet Placement

Improper positioning leads to inconvenience and even sewage problems.
💡 Tips:

• Keep at least 30 cm from the wall and 50 cm from the vanity.

• Avoid moving drain pipes too far from the original outlet.

9️⃣ Wrong Materials

Pretty tiles don’t always perform well in humid environments.
💡 Tips:

• Use anti-slip floor tiles (matte finish).

• Easy-to-clean glazed wall tiles.

• Quartz or sintered stone for vanity tops.

🔟 Poor Finishing & Sealing

Messy edges and moldy joints ruin the look of your bathroom.
💡 Tips:

• Use anti-fungal neutral silicone.

• Metal or stone trims for a more elegant look.

✅ Final Advice:

Waterproof thoroughly.
Drain precisely.
Design smartly.

A well-designed bathroom is more than a space it’s a reflection of your lifestyle and taste.

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