Sheathing overlap

[central1ny]

Should a wall be placed so that the sheathing overlaps the foundation or is flush with the foundation? If the sheathing overlaps the foundation, it seems like this would cause a couple of issues. First, I would need to order my trusses to account for this difference. Second, when I install door trim, there will be a space between the trim and the foundation the width of the sheathing. What is the general practice?

 

[southernfriedcj]

We always run the edge of the wall framing to the edge of the slab so the osb sticks out 1/2" past the edge of the slab.
Basically frame the house per the plan and then add the sheathing. The trusses are ordered by the plan as well so the sheathing goes over the (floor)trusses as well.
The first floor walls are sheathed after raising them the second floor walls are squared up on the floor, sheathed and then raised.

 

[kbs2244]

You don't want the very outside surface of the wall to be flush with the foundation.
You want the drip edge to be at least 1/2 inch outside.
In termite country they use a metal flashing to stop them from getting to the wood, but it also serves as a drip edge.

 

[central1ny]

So if the OSB overhangs by 1/2", how do you finish door trim? Seems like there would be a gap between the trim and the foundation

 

[blkhonda1991]

hopefully this clears up your questions

 

[georgiadave]

Thats good advice on the flashing. There are purpose made flashing pieces for the bottom edge of the siding.