I did a recent home inspection and was shocked to see how a roofing contractor had just covered over the old roof vent holes in the 5/8’’ plywood sheathing of an 8/12-pitch roof with #15 felt and pieces of step-flashing tin-metal. He had removed all of the old RV-50 roof vents and subsequently installed a full-length ridge-vent. The home, located in the Cascade Mountain foothills, had adequately sized 2x6 roof trusses spaced 24" OC for snow load consideration. I argued to the roofing contractor that tin-metal spanning over the approx. 8"x8" cut-outs were inadequate for both maintenance concerns involving a person walking upon the roof, in addition to heavy snow load consideration.
To resolve the deficiency, I told him I would like to see solid 2x blocking nailed in from the attic with replacement 5/8" plywood filled in from topside. Of course, this would require him to remove newly installed architectural laminate roofing in order to do so. He balked. Alternatively, I told him he could then purchase new RV-50 roof vents and re-install them in the existing old cutouts. Yes, redundant high ventilation, but an easier and acceptable solution.
Who agrees with me and my remedial choices…and who agrees with the roofer position of simply using tin-metal to cover over the old roof vent cutouts? And why?