We have a SW Florida (Cape Coral) house built in 2005. The house is block construction, high ceilings (10-14'), about 3100 sq ft, and concrete tile steep hip roof (by eye at least 12 in 12). The locality has reasonably strict building inspections, and has also been through a pre-purchase inspection and two insurance inspections. We bought it new.
But it has no attic vents other than soffit vents along the edge. The edge has continuous vents, and the insulation is spaced nicely below them so there is a lot of air that can flow from the soffits all around. But nothing on any ridge. Nothing anywhere above the soffit. The soffit is all at the same level.
I frankly did not notice for a number of years. I have no idea if this meets code; I would expect it to, given the levels of inspection. I am hesitant to ask the city inspector for fear of opening up an enforcement issue of some sort.
We have one (of two) air handlers in the attic, as well as all AC vents.
It is hot down here. Very hot in the attic 10 or so months of the years, and just slightly miserable in the "winter".
My question is whether it is bad. Would a ridge vent(s) help our AC costs significantly, and/or the reliability of systems up there?
I am hesitant to just add vents, because we have had bad luck with roofers - every problem has required 2-3 visits, and no one seems to have a very good reputation for quality work. At present we have a nice dry roof, all leaks fixed. I hate to open a can of worms for no real point, plus there is cost.
Is there any chance the house should NOT have a vent for some reason? (How can I tell?)
Assuming it might benefit from one, is there any practical way to estimate how much benefit we get? For example, how much less cooling cost (% or whatever)? To see if it is worth the trouble at this point?
Does anyone know if it is code?