Home Inspectors Generally View Tile Decks as Likely Moisture-Control Problems If there is no sealed membrane below the deck, this seepage gains access to the framing, and moisture-control problems begin. Thick, unevenly dimensioned tile can hold moisture longer than flat smooth tile. On the latter, there is the propensity for the tile grout joints to expand and contract from weather or deflection, eventually allowing seepage to occur. Tile can be set on a concrete surface or on a framed deck substructure. None of this critical preparation work is visible to a home inspector. Like all tile installations, the reliability of the system depends almost entirely on what the product was mounted with and what it was mounted on top of. Sadly, many tiled deck installations do not include a subsurface membrane or they are installed on top of a poorly executed membrane. Lack of A Membrane Below Can Cause Serious Problems
#Tiled deck cracked
If the membrane below the tile is intact and performing its function of keeping the water out, replacing a cracked (or erupted) tile or grout joint is relatively easy and inexpensive. However, a failure in the tile installation does not mean a failure in the waterproofing system. If the deck is in a cold climate, the moisture freezes, expands, and causes tiles to erupt. The water most likely entered through cracked grout joints or on the perimeters. Not only does the structure need repair or replacement work, but the tile application must also be removed to access it. The resulting leaks can occur undiscovered for years, eventually causing rot that requires major renovations.
Many residential and light commercial building owners seem to believe a tile installation is waterproof, and fail to pay enough attention (or money) to the proper treatment underneath.
There are also systems designed for dry-laid pavers to be installed on decks, providing a similar look to a tile floor. These systems allow for movement and drainage.
#Tiled deck install
Some systems employ special tiles designed to install without grout in a grid system. There are a few products on the market that allow for a finished tile look on an elevated wood framed deck. For a deck that is partially enclosed, under a roof, and protected from heavy precipitation, a conventional tile floor could possibly be achieved, but otherwise, proprietary systems designed for deck applications should be considered. The combination of tile, grout, wood, and water in an environment with temperature and moisture fluctuations makes it nearly impossible to get the long-term performance that most homeowners expect.
Installing tile over a standard deck frame in an exterior environment is a recipe for trouble. Tile Decking – Elevated And Over Living Spaces
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