Nail the fabric in place with 2 roofing nails one high and one low.
Smart vents roofing.
At the location of the shingle course where the smartvent is to be located measure up from the bottom of the shingle the weather edge 6 to 7 before installing the actual shingle.
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Do not cut the rafters.
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Smartvent tapered end caps sold separately are available for terminating an installation prior to an obstruction such as a wall chimney hip valley or pipe.
They can also be used on the top of structures as outtake vents almost like a ridge vent would work but in applications where there is no ridge.
In fact the smart vent team is certified to instruct and provide learning credits to architects builders certified floodplain managers code officials engineers insurance agents realtors and surveyors in many states.
Step 3 lay the 3 piece of smartvent even with the drip edge and at the roof rake drip edges.
It allows air to flow freely through the 1 roof decking slit providing more than adequate soffit ventilation to maximize ridge vent effectiveness.
Step 3 make lines at the 6 and 7 marks and cut through the top of the previously installed shingle and the plywood only.