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Dry vs. Wet Toilet Installation Methods: Pros, Cons, and Cost Breakdown




 

Dry vs. Wet Toilet Installation: How to Choose the Right Method + Cost Breakdown

When installing a new toilet, one of the key decisions is whether to opt for a dry installation method or a wet (cement-based) method. Each has unique advantages and drawbacks depending on the bathroom environment, flooring condition, and long-term maintenance needs.

1. Dry Toilet Installation Method

This method relies on screws and silicone sealant instead of cement. It is commonly used in modern or dry-separated bathrooms.

Installation steps:

  1. Determine the installation spot → Drill mounting holes → Apply sealant (e.g., putty) around the outlet pipe

  2. Secure the toilet using screws

  3. Apply silicone or rubber seal to complete the edge

Best suited for:

  • One-piece toilets with wide bases

  • Dry-separation bathrooms (to prevent mold)

Pros:

  • Fast installation, can be used immediately

  • Aesthetic finish with matching silicone

  • Easy to dismantle for future relocation

  • No cement expansion risks

Cons:

  • Prone to wobbling on uneven floors

  • May grow mold if installed in wet zones

  • Risk of damaging waterproof layers during drilling

Cost estimate: Starts at NT$2,000 (excludes old toilet disposal)

2. Wet Toilet Installation Method

The traditional method involves using cement mortar to fix the toilet in place, offering robust durability.

Installation steps:

  1. Identify pipe location → Apply mortar (never pure cement)

  2. Place and level the toilet

  3. Smooth the surrounding mortar for sealing

Best suited for:

  • Older apartments with irregular pipe designs

  • Non-separated wet bathrooms

Pros:

  • Strong fixation, better sealing

  • No drilling required, preserves waterproofing

  • Mold-resistant and easier to clean

Cons:

  • Permanent fixing; removal is difficult

  • Requires 1–2 days to set before use

  • May absorb odor if ventilation is poor

Cost estimate: Starts at NT$2,000 (additional repair costs may apply)

3. Final Recommendations

Choosing the right method should depend on:

  • Bathroom environment (wet vs. dry separation)

  • Toilet design

  • Existing piping and flooring
    Consult a licensed plumber or technician before making the final decision to avoid issues such as leakage or instability.

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