From: Schluter Systems
Schluter-Systems recognizes the challenge exterior tile installations may pose for installers, so it designed its Schluter-TROBA-LEVEL specifically for use with thick porcelain tiles rated for exterior use. The paver support system, or pedestals, supports the tiles above the substrate with no bonding system required, which provides the advantage of simple installation, natural drainage and ventilation. Several accessories are available to manage sloped substrates and different thicknesses of tile. Because tiles are not bonded in place, the system allows quick and easy access to waterproofing, drainage systems or utilities beneath a finished patio, but the paver support system does need to be properly contained and restrained around the full perimeter for a durable, long-lasting installation.