Pry away the siding and slip the felt under the siding.
Roof underlayment flashing install.
Nail metal drip edge flashing which bends over the roof and down the edge of the facing board on all roof edges.
Fold the top over the roof ridge and cut the bottom along the drip edge metal.
To make corner flashing take your tin snips and cut a 45 degree line from an outside corner to the center fold.
Apply an approximately 3 inch.
Using your staple gun secure the felt to the roof.
Seal with adhesive sealant or tape as described in section 6.
Install underlayment a minimum of 6 inches up roof protrusions or vertical abutments.
Do not drive nails into the flashing.
Then install a non corrosive metal valley flashing of 24 minimum width.
Fasten drip edge on eaves with.
Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing.
Install final flashing material.
Cap staples are recommended on this underlayment every 12 inches along the bottom and every 24 inches in the middle.
Installing roof felt is a two person job.
Again do not drive nails through flashing.
These pieces act as a weather proofing and protective barrier between your house and the elements helping keep water and cold temperatures out.
You ll have to overlap shingles as you go much like weaving.
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.
Start by laying asphalt felt or other underlayment over the roof.
Now it s time to install the underlayment and flashing.
Install an underlayment centered in the roof valley.
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.
In that installation the lower edge of the felt must be on top of not underneath the drip edge.
With underlayment and flashing installed apply shingles up to one side of the flashing.
Then install shingles on the other side.
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.
With a clean valley you can lay down some peel and stick roofing membrane.
