Available in many colors, textures, styles and sizes, tile is a popular choice for finishing an outdoor table. In addition to range in appearance, each type of tile has different attributes which make some suitable for exterior use in cold climates. For example, travertine tiles are porous and a less-popular outdoor choice in areas that freeze regularly. Ceramic tiles, on the other hand, are often tested to withstand freezing temperatures and a tile's rating level should be listed as passed or resistant on the data sheet.
In a location subject to freezing temperatures, tiles should not be set with mortar because the tile will pop the mortar joint when moisture enters the tile, freezes it and causes it to expand.
Quality distributors and retailers have a single page data sheet, showing the test results for every tile they sell. Investigate the product you are buying and consult a qualified salesperson. Ask for the single page International data sheet for every tile under consideration. Designers and industry experts should use the Water Absorption percentage (WA) of the tile as a guide when selecting tile for cold-climate outdoor conditions.