Soffit closed up

I didn't want to spend about $40 on a roll of insulation to patch up just a couple of feet of empty joist space. So I spent about $18 on a sheet of 2 inch thick styrofoam. I cut 4 pieces to fit, wedged them in place and added a couple of nails underneath to hold them in place. Then I screwed the plywood soffit back in place.

That will keep the birds from building nests, but there is still a gap between the soffit and the brick. I am still trying to figure out how to fill that gap before reinstalling the vinyl soffit pieces. No hurry now, and I have a full can of RAID should I see any bugs flying around there.