Two story house. Upstairs bedroom has a deck (9*9). Below that is the (bigger) first story deck. I wanted to create a screened in area on my lower deck by framing walls up to the upper deck's rim joists.
However, this would not give me enough room so I decided to expand the footprint by building a small, low-pitched shed roof attached to one of the upper deck's rim joists. It's great, just enough room. But in my haste to finish the project I didn't consider the effect of using a single top plate for the new supporting wall.
The new wall is 2*4, 16" oc. The rafters are 2*4, 5 ft long 24" oc. The total roof area is 50 sqft. 10' * 5'. I sheathed the roof with 5/16 plywood.
I don't think that this is enough load to really cause the top plate to sag but now I've got to thinking about it. One thing that I have to do anyway is to install 2*4 horizontal blocking between each rafter, resting on the top plate. The initial reason for this was to block off mosquitoes etc.
The question is, would this blocking be enough to stiffen up the top plate for such a small roof? Or should I also screw in some 2*4 blocking in between each stud and attach those to the top plate?
Thank you and I apologize if it's long winded. I wanted to be as thorough as possible.