On a room that I am removing paneling I ran across something odd. First the room appears to be a converted garage/expansion. It is about 20 or so feet wide, half the floor is concrete and half is a normal subfloor (I'm hoping) about 8 inches above the ground. Over the concrete it has a sole plate with the studs attached to it. Over the regular floor there is no sole plate at floor level the studs just go down into the floor. I am assuming there is a sole plate down there, couldn't see. Seemed kind of odd to just have it open to the underside. Seems like animals could get into the walls, although I see no evidence of this. I was thinking about nailing a 2x4 shorts between the studs at floor level to cover the opening.
Are there any issues/concerns with the current design or with my idea of closing the openings?
I don't see any reason why you cant install the blocking. It sounds as tho they installed the floor joists along side the wall studs. The blocking would act as your bottom plate ,which would aid in support of you wall board and base moulding, and help on cutting down drafts. BOB