I've been told that getting my roof ventilated is probably the most
important thing to do for passive cooling. The ventilation is pretty
The basic building code asks for 1 sq foot of NFA (net free area) of
ventilation per 300 sq. feet of attic space. And 1/150 if you have
insulation in there without a vapor barrier, which i do.
Does more ventilation than that cool down the attic and the rest of the
house better? It's not really a lot of ventilation.
It seems like intake ventilation is easier to get than exhaust
ventilation. People have suggested ventilation plans to me that give far
more intake than exhaust ventilation. Do you get any extra cooling from
adding intake ventilation over the amount of exhaust ventilation?
For exhaust ventilation, people have suggested ridge vents and louvers.
I might need both to get enough ventilation, the ridge is very short.