Can I put fastener-sealing eave protection over the decking (sheathing) before applying the shingles?
Fastener-sealing eave protection is very helpful at the eaves and the valleys. If Type 30 roofing felt is installed on the remainder of the roof with a continuous ventilation product on top of the felt and eave protection you will have a great roof. If using a Certi-Last® or shake felt system product you only need the felt and eave protection.