New'ish' home massive water intrusion.
This is a cross-post from the home disasters forum. http://ths.gardenweb.com/forums/load/disaster/msg0811574213565.html?6
It was suggested that I post this information here. Bottom line is, don't for a second skimp on proper water drainage and flashing!
I'm not going to post pictures yet, but be advised I can put my head through the holes in the rotten OSB! Pictures don't do it justice.