Fixed height rubber pedestals are a great way to install porcelain pavers over balconies, roof tops and any waterproofed surface. We call this a shim system as each pedestal can be shimmed to the desired height with rubber pads or 1/16th rubber shims. Available in 1/2 and 1/8th thickness'. In addition these fixed height pedestals are stack-able so you can increase heights as needed very easily.
One of the most efficient ways to install porcelain pavers.