This depends on the situation. If the external roof covering is at the same height on either side of the Dry Fix Bonding Gutter®, then the central upstand should be cut down at an angle to allow the ridge tile to pass over the joint in the roof.
If the external roof covering is higher on one side of the Dry Fix Bonding Gutter®, e.g. tiles on one side, slates on the other or flat tiles on one side and profiled tiles on the other, then the ridge tile cannot be carried over the joint in the roof. In this case the central upstand should be mitre cut on both sides of the roof so that the ridge tiles can butt against it.
In both situations, a saddle should be formed over the joint. This is most easily achieved using a good quality flexible, fully adhesive flashing product such as Fast Flash.
