What's the proper way to flash an inside roofing corner, with self-stick membrane?
Tar Paper or Membrane underneath, I've never found a single drop make it through metal flashing...that was replaced or re-faced with every new roof. If we're not talking about the slope being parallel with the wall &amp; the slope is perpendicular throwing water at the wall, then definitely membrane as far &amp; wide as you can under very tall &amp; wide metal flashing.