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Setting tile on vertical surfaces and ceilings brings extra challenges like deflection and gravity into consideration on a project. CUSTOM has compiled some of the most commonly asked questions about how to successfully install tile on walls and ceilings.

The guide addresses what can be installed and where it can be installed. One of the most common questions is “what is the maximum tile size and weight that can be installed on walls?” For direct bond installation on commercial projects, International Building Code limits tile on exterior walls to less than 24” on one side, less than 3 square feet total area and less than 9 lbs. per square foot. There are no restrictions for interior walls, but some recommend that the maximum weight should not exceed 15 lbs. per square foot. Larger and heavier tiles also require anchoring with mechanical fasteners. It is important to remember to consult your local building code for tile weight and size limits on your project.

CUSTOM then details which substrates are suitable and not suitable including:

- gypsum drywall

- wood surfaces

- foam

- painted surfaces

Installers should always consider wall flatness, as well as movement joints. Ceilings in both dry and wet environments have their own consideration.

The Wall Installation FAQ contains information on which installation products to use. Non slip mortars like ProLite and waterproofing membranes like RedGard Waterproofing and Crack Prevention Membrane are a must.

For more information on installing tile on walls, read our detailed FAQ.

Installing Tile on Walls FAQ

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