I inspected a new build, it is ~50% complete and the contractor walked.
Anyways, a standing seam metal roof is installed (poorly, which is another story), rough plumbing is complete except all plumbing/ vents terminate inside the structure and penetrations in the new roof have yet to be made.
Is it typical in new construction to install vents after a metal roof is installed? I would think not but haven’t been able to find anything to back that up.
Shingle roof have venting installed prior to roofing as far as I understand. Thanks for any help
Yes. It is better so the hole in the roof will miss any ribs in the metal roof. You can make a swing joint in the vent piping to move it where you want it also.
Roof shingles, the VTR is always installed first typically.