All of this refers to shingle roofs, which we don't see much of. We mostly deal with concrete and corrugated steel/galvalume, the latter being a nightmare. Does anyone have good ideas for dealing with corrugated? There's no way to flash it, the blocks are fine when you hit a beam on the ridge but half the time your penetration has to be on the trough of the corrugated steel.
<div>Other than lots of goop, I don't know how else to seal it.</div>