I've installed the vents from soffit to ridge, and I've installed Insulation. But there is still a serious gap between the vent and the rim joist, that Insulation is just not going to take care of... I had, blocked this area with a block of foam board insulation, and some expanding foam. But when they put the soffit and trim on the house my blocking moved and cold air is pouring in, and keeping the new room very cool... What ideas do you guy's have?? I had seen a product that was called wind block ? but it was for 24" oc roof joists, I need something for 16".