Photo above shows in the distance a louvered open ventilation on the east side of attic wall. The photo following shows one of the small round roof ventilation holes. There are three of these small cut holes. No matter what we've used over the years as a deterrent, birds still get to the mesh and plug these with nests or by making a roost. If possible, we will examine the cost of closing these off and creating a roof ridge vent. We definitely need better and consistent ventilation as we seal the house.