Would welcome some advice - I'm planning to replace my fibreglass flat roof drip edge and around 12'' of OSB board as over the last 10 years water has started to pool and not completely drain into the gutter. It looks like the OSB board has warped and curled upwards at the drip edge causing pooling. Is it feasible to replace around 12'' of OSB board by cutting the old board away then replacing with new 12'' board then adding fibreglass with a join to the old fibreglass at the 12'' joint line?