The TuffStuff® Long Leg Angle Fillet is used to create a join between the roof deck and an adjoining wall or parapet that is of non-standard brickwork construction. The Angle Fillet should only be fixed to the roof deck. It must not be fixed to the wall. This allows for natural movement/expansion to take place without causing damage. Joins in the Angle fillet should be overlapped and sealed with trim adhesive. CSM Bandage should then be applied.