Graphical Construction Glossary >> Roofs and roofing. >> fascia stiffener
On overhanging eaves the very last (sometimes two) jack rafters have very little support. They sit only a small amount inboard of the wall plate. As a result they do little to add support to the roofing battens, roof sheeting and the fascia.
The solution is to fix stiffeners between the end of the hip rafter and the last well supported jack rafters.
The tops of the stiffeners are fixed at the same height as the top of the rafters, (the same plane or surface) so that the battens alongside the hips can fix directly to them.
I have actually seen roofs / fascias fixed without them so that they had "a droop on them like the wings of a B52 bomber." They looked OK until the weight of the cement tiles came into force.
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