We’re in the process of building an all-SIPs home, but have received a bid that runs the roof panels to the bearing wall. The roof splines will be carried out to the spec’d overhang length, so that framing lumber can be attached to construct the overhangs.

The quote for extending the SIPs panels to the overhang length is an additional $4,000.

I’m wondering what folks think is the best strategy, structurally: Carry the SIPs out or use the spines to attach framing to construct the overhangs?

Thanks,
Claire