We have recently purchased a 1979 brick home that was a foreclosure. We removed the drywall on the exterior walls inside the house to see what was there. What we found is where squirels or rats? have come in around the roof line and chewed through the walls and built nests. How can we repair this and stop future visits. Also we live in North Florida what is the best thing to put back in the studded walls beside insulation (i.e. vapor barrier). Thanks