In that installation the lower edge of the felt must be on top of not underneath the drip edge.
Roof underlayment flashing install.
Using your staple gun secure the felt to the roof.
Then install shingles on the other side.
Install underlayment a minimum of 6 inches up roof protrusions or vertical abutments.
Apply an approximately 3 inch.
Install an underlayment centered in the roof valley.
Nail metal drip edge flashing which bends over the roof and down the edge of the facing board on all roof edges.
To make corner flashing take your tin snips and cut a 45 degree line from an outside corner to the center fold.
You ll have to overlap shingles as you go much like weaving.
Do not drive nails into the flashing.
With underlayment and flashing installed apply shingles up to one side of the flashing.
Pry away the siding and slip the felt under the siding.
Fold the top over the roof ridge and cut the bottom along the drip edge metal.
Installing roof felt is a two person job.
That is the drip edge flashing is the first item installed onto the roof sheathing or atop old shingles in a multi layer shingle re roof job.
Cap staples are recommended on this underlayment every 12 inches along the bottom and every 24 inches in the middle.
With a clean valley you can lay down some peel and stick roofing membrane.
Now it s time to install the underlayment and flashing.
Install final flashing material.
But first we re going to flash the eave with metal drip edge flashing and install the roofing membrane over it along the bottom edge of the roof.
Again do not drive nails through flashing.
Lap successive sheets of metal flashing a minimum of 12 inches and seal laps.
Then install a non corrosive metal valley flashing of 24 minimum width.
Where the roof meets a wall lap the felt up 4 inches if possible.
Fasten drip edge on eaves with.
Recommended procedures of basic valley flashing installation.
In some situations you may have to temporarily remove the siding and replace it after installing the underlayment shingles and flashing.
Seal with adhesive sealant or tape as described in section 6.
Install your underlayment completely and your shingles up to where the wall begins so that the first piece of flashing or the corner flashing will rest on a shingle.