Measure for posts large 8 x 8 posts are necessary for the use of supporting a porch roof.
How to support roof overhang.
Slide your first sheet of flashing under the first layer of shingles.
Get up on your roof or scaffolding.
While many like to use.
If you are thinking about replacing old rotted porch posts the first thing you ll need to know is how to jack up and support the roof structure properly and.
Take the longer flat side of the flashing and gently slide it in between the first row of shingles and the roof.
Slide the flashing in and line it up so that the bent angle runs parallel to the overhang.
How to support a porch roof step 1.