This will allow for expansion and contraction and prevent buckling.
How to install roof drip edge flashing.
The starter course is comprised of a shingle that s roughly half the width of the field shingles.
Slide the corner tight to the fascia.
Overlap two pieces of flashing that meet end to end by at least 1 inch.
Make sure the corner is tight and that the bottom edge is tight to the fascia before nailing off the drip edge.
While the vertical leg should be placed 1 4 1 2 away from the fascia.
The roof leg should extend a minimum of 2 back onto the roof sheathing.
Space the fasteners by about 12 inches.
Install the drip edge by fitting it on the roof eave pushing it tightly against the edge of the plywood and nailing or screwing it down.
At the eaves when installing the drip edge on top the underlayment a 4 inch wide layer of asphalt roof cement complying with the astm d4586 type i or type ii is required.
Install the starter course.
You may need to nail through the starter strip into the drip edge.
Using drip edge with a nailing edge approx.
Be sure to tuck the drip edge under the starter strip and felt paper.
4 deep nail the drip edge to the sheathing every 16 if installing multiple runs of drip edge lap them by 1 4 1 2 inch keeping the nail back from the lapped joint.
Make sure to support the long end of the cut if you let it fall after cutting it will bend down and kink the drip edge.
How to install drip edge flashing to a new roof.
The drip edge should be installed on top of the underlayment at all rakes and below or on top of the underlayment at the eaves.
To install a drip edge on a newly constructed roof or on a re roofing job attach the drip edge along the roof s eaves first.
Place a nail at one end then the other.