What is “plenty of soffit vents”?
I think I understand “Lstiburek’s Rules for Venting Roofs”. I need to contract for insulation and a new roof on a property (1950’s duplex) in the Pacific Northwest. The building has soffit vents – about 3 (approx 18” X 6”) per side, so 12 vents and NO other vents up top (has been like that for years and no moisture problems in the attic which does have insulation). Should I make the soffit vents continuous? Or, since it has been working well for all these years maybe just add a few more soffit vents and a ridge vent at the top (not to exceed in size the area of the soffit vents)? Would love some advice? I will be having all insulation removed, everything sealed, and new insulation installed.