My husband and I bought a commercial building that was built in 1895, and we've converted the top floor into a loft apartment. The windows are 9 feet high, double hung sash, and none of them still have the window weights. I'd like to convert the windows so each sash tilts for easier cleaning. It's located on a main downtown street, so traffic is often heavy, and dirty windows are a problem. Is this possible? My husband says no, but I'm hoping someone here can help me out! Thanks in advance!