I always use i w at the rake and the drip edge is always installed before the i w is put down.
Roof drip edge pros and cons.
Drip edges are metal sheets usually shaped like an l installed at the edge of the roof.
It should reach 3 feet beyond the inside of the wall and cover any valleys to prevent ice dams and wind driven rain from reaching the sheathing.
So the i w is ran over the drip edge on the rakes and under the drip edge on the gable ends.
This can present a potential problem as a drip edge needs to be added to a roof.
Without a drip edge water may end up beneath the shingles and may cause damage to various parts of the home.
While it is possible to install a drip edge after the roof is complete it is far easier to just get one when you re getting your roof built.
Drip edge is one of the unsung heroes of preventing home damage.
Galvanized steel drip edge flashing.
Drip edge flashing.
If water penetrates the roof at any point and runs down the underlayment at the rake it will run right behind the drip edge fascia.
Galvalume has a coating of aluminum over the steel and will likely take more time for rust to occur at the exposed locations of the panel.
29 gauge galvalume ef3 eave flashing in gray.
Also called drip edge flashing or d metal they serve a vital function by directing water away from the fascia and into the gutter.
By oatey 17 13.
However wear occurring along the roof s drip edge where all the water and snow run off will eventually wear away the aluminum coating once the paint finish fails and rust will ensue.
To shed water away from the eave most roofers add a metal drip edge right to the roof deck covering it with the membrane.