Every building has a lifespan. Our current house is feeling very tired and has come to the end of its life. Built in the 1920s in two pieces it leaves much to be desired from many perspectives. It is poorly insulated (4 inches of fiberglass batts in the ceiling) and the walls are leaning outward. Half the house does not have a foundation, just a dirt crawlspace we have to heat to keep the water lines from freezing. The plumbing is crazy and the wiring is scary. One outlet recently started to smoke when we had the microwave on for more than a minute...
It isn't, however, without its redeeming qualities. Beautiful wood trim and floors give the home a lot of character and it is has been very functional for our family and several families before us. In spite of this, we decided it was time to rebuild.