A minimum of what thickness should the mortar bed be for ceramic tiles installed through the wet set method?

The minimum thickness for a mortar bed when installing ceramic tiles using the wet set method is 1 1/2 inches. This thickness is essential because it provides adequate support and stability for the tiles, ensuring they adhere properly and withstand the weight and stresses of regular use. A mortar bed that is too thin may lead to cracking or unevenness, which can result in tile damage or failure over time.

In the context of the wet set method, where tiles are pressed directly into freshly placed mortar, the minimum thickness helps to create a solid base that allows for proper bonding and facilitates effective water drainage. This is particularly important in wet areas, where moisture exposure is prevalent. By adhering to this thickness standard, installers can ensure that the completed tile surface will be durable and capable of lasting under the intended use conditions.