I am having an issue with ventilation in my shop building.
The taller building is 48x72 with a 12 foot ceiling and is insulated with blown in cellulose which is a little lite as my inspection shows.
Less than 4" in some spots and lite at the outside edges. So I am planning to put another 4" of blown in fiberglass.
As far as i can calculate not knowing exact brands the roof seems to have required ventilation with the ridge vent and the ventilated soffit running full length.
The shorter building is 30x50 with a 10 ft ceiling that somewhere along its lifespan has lost its roof vents which will be corrected, it has vented soffit full length.
I have been having issues with ice dams and and you can see have ripped off my gutters and fascia trim and soffits on one side.
Luckily i had 2 rows of ice guard when we had the building built so no evident sheathing damage from the underside inspection. This is the only addition that has any issues at all.
I was going to install a powered gable vent but as i researched more that seems to be inadvisable .
Anyone here have any suggestions other than the ones i mentioned?