[masraum]

Originally Posted by Bob Kontak

My house in Houston had zero soffit vents but several roof vents, including a spinny one.

Bought about $20 worth of sixty five cent (1996) rectangular soffit vents and went to town.

Main reason I'm posting this is when I cut the hole for the first one and the wood piece dropped out, the suction pulled the falling sawdust back into the attic.

Wow, interesting. I've heard that you have to have fairly balanced top/bottom venting (ridge/whirly to soffit), and it makes sense, but I think it's cool that your anecdotal experience backs that up in spades.

Our current home has 2 turbines and absolutely 0 soffit venting. Our soffits are 3/4" TnG wood. I have been assuming that I'd need to do something to fix the situation. I guess your experience is proof positive.