If the tile is sitting in water due to poor drainage conditions or typical winter icing, will these frost resistant/frost proof tiles perform adequately?
It is very common for frost resistant tiles (including tiles that can cycle more than 2000 times through freeze/thaw conditions) to be damaged by water and ice that sits on the tile, when the water can get in the grout joints or in voids left in the setting bed. What is the TCNA Handbook detail for exterior tile application over a concrete substrate? Method F101 and F102 are both used for exterior walkways. Typically, it is important to have better than 95% mortar contact between the tile and the substrate and for the thinset or mortar to be rated for exterior applications. The grout joints should be full, compacted, and preferably sealed with a vapor permeable sealer. Is porcelain tile the only tile rated for exterior applications? Absolutely not. Many non-porcelain quarry tiles and others are rated for exterior applications. Always check with the manufacturer for “area of use” for a specific product.
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