Mine was built in 1975 (we bought it in May 1998) and it was the builder's first house. Some things weren't done quite right. The V-match pine floors were face-nailed rather than toenailed on the tongue edge, and we had nails working up and snagging socks until we had laminate installed on much of the area. The plywood sheathing only reaches within 3/4" of the top plate on the back wall - why they didn't add the 4-inch strip to close off the opening I don't know, but that left a wide come-hither to small rodents. Th back bedroom (now our computer room) had an unpleasant aroma on warm days when the sun was shining on it, and when we re-did the room in fall 2018, we found the fiberglass insulation was chewed into small bits. Also, the bottom 3-4" of the cavities were accumulated mouse pee/poop with a reek that was staggering. We found a spray designed to kill the stench, and multiple applications followed by baking soda took away nearly all of the smell. We replaced the fiberglass with Rocksil, which is supposed to deter mice. No smell so far but only 3 summers. Our location in the woods is hard to beat, however.