One of the most common questions I get during shower tile consultations is: what size tile should I use on the walls? There is no universal right answer, but there is a clear framework for getting to the right answer for a specific shower. It comes down to the shower dimensions, the design direction of the bathroom, and what the installation correctly requires at that format. This post explains the framework.
Frequently Asked Questions
Q1: What is the best tile size for a walk-in shower floor?
Answer: Small-format tiles—typically ranging from 1×1 inch to 2×2 inch mosaics—are best for walk-in shower floors. Smaller tiles easily conform to the compound slope required for proper water drainage toward the shower drain. Additionally, the extra grout lines between smaller tiles significantly increase traction underfoot, improving slip resistance on wet surfaces.
Q2: Can I use large format tiles on my walk-in shower walls?
Answer: Yes, large format tiles (such as 12×24 inches or larger) are an excellent choice for walk-in shower walls. They create a clean, modern aesthetic with fewer grout lines, which makes cleaning easier and helps small bathrooms feel more spacious. However, they should generally be reserved for the walls rather than standard sloped shower floors.
Q3: Why are large tiles bad for a sloped shower floor?
Answer: Large tiles cannot bend or conform smoothly to the multi-directional slope (envelope cut) required for center shower drains without awkward cuts. Using large tiles on a shower pan can cause water pooling, poor drainage, and an uneven surface underfoot. If you want large tiles on the floor, a linear drain system is typically required.
Q4: How does tile size affect slip resistance in a walk-in shower?
Answer: Tile size directly impacts safety because grout lines provide natural friction underfoot. Smaller mosaic shower floor tiles create a higher grid density of grout lines, which prevents slipping when the floor is soapy and wet. Large tiles offer smooth, continuous surfaces with fewer grout joints, reducing natural traction.
Q5: What factors should I consider when deciding on tile size for a shower remodel?
Answer: The three key factors are drainage contouring, slip safety, and maintenance/aesthetic preferences. You must ensure the floor tile can contour to your drain slope safely while selecting wall tiles that balance your visual preferences with how much grout maintenance you want to manage.
