We had the table saw outside today so we took the opportunity to slice the 2 by 4 inch timber diagonally down the length, to produce a sloping edge shaped piece, two of them. These will be used on the roof to create an edging right around the perimeter to form a dam to push the rain water down and into the rain drains. The rubber membrane will be glued up the slope and fix down with aluminium grip bars on top of these rhomboids we have made today!