Which paving support system is best for porcelain tiles when used on roof terraces?
For porcelain, we always recommend a fixed head pedestal as opposed to a self-levelling head pedestal. The reason for this is that the tiles don’t always impose enough vertical load to prevent a small amount of movement, so when the surface is walked on, you may end up with a very slight difference in height between tiles. Fixed-head pedestals will overcome this. When used with a 2mm shim, they can be used on a gentle fall, too!
