roof-curb vibration and weather seal: keep both functions intact equipment connections: rtu, ahu, vav, fans & louvers roof curb vibration gasket weather seal rtu curb isolation verify the curb gasket, isolation, flashing, fasteners, and unit bearing surfaces work together without creating gaps or rigid vibration bridges. the curb must keep water out, support the unit, and avoid creating noise or vibration problems at the same time. rtu and curb submittals, roofing detail, vibration-control detail, manufacturer instructions can we verify the curb gasket, weather seal, and any isolation detail before the unit is fully secured?