Outie door detail for 4″ exterior rigid foam
I’m designing an addition with “outie” windows and doors that will have 4″ rigid foam on the exterior in climate zone 5 (Boston area.) I understand that all my “outie” boxes need to extend 4″ + 0.75″ for 1×4 furring strips so that they will all be flush with the back plane of the siding. The structure will use ZIP system structural sheathing + WRB. I plan to flash from the base sheathing all the way to the inside of the boxes, using liquid flash if necessary.
I’ve read all of the posts on this site I can about outie windows and doors, so I’m comfortable with the weatherization of this drawing. My question is whether this detail will be structurally sound. Will the extra wide king studs plus the bolted-on sill extension be strong enough to support the weight of the door? Will the “jamb box” I’ve drawn be sturdy enough for the hinge side of the door?Is it ok to put the header on the inside face of the framing?