Vertical joints should lap a minimum of 4 inches and be offset by at least 6 feet in successive rows see figure 2 2.
Roofing felt requirments in florida.
On roofs with a slope of 4 12 or greater use a single layer of 15 lb.
Asphalt saturated felt starting at the eaves and lapping upper courses over lower by a minimum of 2 inches.
For other applications builders and roofers must use d226 type ii roofing felt or a synthetic felt that has met florida building code approval.
On roofs with a slope of 4 12 or greater use a single layer of 15 lb.
Vertical joints should lap a minimum of 4 inches and be offset by at least 6 feet in successive rows see figure 2 2 at left.
Starting at the eave apply 36 inchwide 914 mm sheets of underlayment overlapping successive sheets 19 inches 483 mm end laps shall be 6 inches and shall be offset by 6 feet.