Bathroom Tile Calculator
Bathrooms have multiple zones: shower floors, shower walls, and main room floors. Calculate tile needs for each area separately in one go.
Mastering Bathroom Tile Projects
Bathrooms are the most technically demanding room to tile due to water, slopes, and drains. Using the right tile in the right place is critical for safety and longevity.
Tile Zones & Requirements
- Shower Floor: MUST be slip-resistant (small tiles like 2x2" mosaics). Large tiles cannot slope properly to the drain without uncomfortable sharp angles.
- Shower Walls: Glazed ceramic or porcelain. Waterproofing happens behind the tile (RedGard, Kerdi, etc.). Tile itself is just a water-shedding surface.
- Main Floor: Larger tiles (12x12, 12x24) work well. Ensure they are rated for floor use to prevent cracking.
Waterproofing Is Key
Never install tile directly on drywall in a shower. Use Cement Board (Durock/HardieBacker) and coat it with a liquid membrane, or use a foam board system like Schluter-Kerdi. Failed waterproofing leads to mold and framing rot within 2-3 years.
Frequently Asked Questions
Can I use marble in a shower?
Yes, but it requires high maintenance. Marble is porous and absorbs water/soap scum. It must be sealed before grouting and resealed every 6 months. Porcelain that looks like marble is a zero-maintenance alternative.
How high should I tile shower walls?
Ideally to the ceiling. This prevents moisture from damaging the drywall above the showerhead and makes the room feel taller and more luxurious.