I'm working on a house where the roof will be exposed glulam beams with tongue and groove car decking as the finished surface. The car decking will extend continuously beyond the wall and become the soffit for the overhang. I'm concerned about air-sealing between the car decking and the top plate. I was thinking that some kind of compressible gasket or foam would be able to compress into the chamfered "v" shaped sections of the car decking. Is there a specific product that would work for this?