In January we were called to build a roof deck on #TwinPeaks The system is called #BisonDeckingSystem. It consisting of many different sized shims, disks and pedestals to prop each 2'x2' IPE (ironwood) tile. Since all roofs are sloped for drainage, you use these different shims, disks and pedestals to level all the tiles.

The first step is to survey the roof with a later and take elevation measurements in a grid 2'x2' to