I have a 16'x20' deck roof that is attached to my garage on one side and (3) 4"x4" posts on the other side.
The rise over the 16 feet is about 2 inches which is not enough for the water to get off the roof. It's pooling in certain spots. Probably because the 16 foot run is unsupported in the middle and it sags.
A friend is recommending that I jack up the roof, saw off 4 inches off the bottom of the posts to get the water to run off.
My concern is that this would rip the roof off the garage wall. Is this a practical way of introducing more pitch? Or is it better to just rip down the current structure and redo it with the appropriate pitch?