I will be reroofing a rental building that I own. I would like to know if I should be installing ridge vents. Currently no ridge vents are being used. For a better roofing system, should I install them? What would be the best leakproof, longest lasting,lowest maintenance ridge vent available? What are some requirements as far as pitch and proper soffit venting? Current pitch is 4:12 We will be re sheathing 4'x8'x1/2" Planning on using OSB Would you recommend using a radiant barrier lined osb board? Some of these buildings do not have any attic insulation installed. Total roof is 288 Squares 1 of 6 buildings that have to get reroofed
I would recommend installing ridge vents when you reroof the buildings. For a ridge vent to work properly, it needs to pull the flow from soffit venting. I would recommend using a ridge vent recommended by the manufacture of the shingle you decide to use.
Soffit venting or Low roof venting (intake) needs to be equal in sq in. to the ridge venting (exhaust). 1/300 is the normal calculation some areas 1/150 is recommended or required. Check with your local build department. Your pitch of 4:12 is good for a shingle system.