Greetings:

I have learned immense amounts from reading this forum.  Now it's my turn to ask a question.  My wife and I are going to be building, in Oregon, an updated version of a classic 1910 California bungalow: 1.5 stories, 3:12 pitch roof, with wide-spreading eaves.  We want ICF walls with SIPs on the roof.  To make this look right, we must have a good, healthy overhang (48") with exposed rafter tails.  (Overhang on the gable ends will be 30", that is, with the eaves at 48".)  Is this something that builders can do, and if so, how do they do it?  Obviously we don't want to have a 10" panel sticking out 48" on either side.  Please give me a reality check.  Thanks.

Not a problem. I would end the panel flush with exterior of the the outside wall. Then have the manufacturer embed 2x material within the panel that would extend out the 48". The 2x could then be cut and or fabricated to produce the desired affect. Sheathing could be installed on the top(of the 2x's) for your roof plane extension.

Good Luck!

Thanks!

BTW, How is this done?  Where is the 2X material attached within the panel when it is "embedded"?

Each manufacturer may do it differently, but it is a standard practice. Normally, the 2x would extend the thickness of the panel, and be affixed through the skins. In your case they would probably be 2x10's, and you could trim them to size on the bottoms of the panels.