Rather than retyping it all, here is an older thread where this was discussed:http://www.doityourself.com/forum/ho...w-fixable.html You could also find more threads on this topic by typing broken pivot shoes into the search query at the top of the page. Your pivot shoes are broken, so that is the part of the thread you would want to focus on, since there is a trick to getting them out and putting them back in without irreparably damaging the jambs.

Have you ever considered that the difference/problem may lie in the installation of the window (a.k.a. hole in the wall)? You may have leakage/infiltration around the window and the window may not be much of a factor since no matter what kind of panel structure and gas filling the heat loss through the glass portion is. Radiation losses can be decreased dramatically with just a thin paper shade. The window in the cold bedroom may just not be installed proper as about 65% of the windows also fall into that category. It may not be a problem with the window, but with the installation and air loss around it.

interesting replies. thanks. i never looked at a 3m window kit so i'll have to do that to see whats in it etc. The room has actually been 'storage' for a long time but i'm working diligently at cleaning it out and after i get the pool table cleaned off, i would like to use it someday again. I also forgot to mention throughout the house i removed all of the wood at the bottom of every window (there is no wood anywhere else around any window) and used the foam in the blue can after seeing totally open cavities under all the windows. this foam made a very noticable difference in airflow even under my brand new 13x5 window in my living room. Of course this is proof that new windows wont solve every issue! That blower test sure was an eye opener since i never would have known what was under my windows air - wise. imagine when that 13x5 ft window was aluminum how much air got thru that! candles would blow even if you never moved....best 2500 i ever spent lol. but since i only have wood at the bottom of the bedroom windows there's really nothing else to do but i guess try caulking, which i admit i never did around those windows (thanks for the idea), and shop for that kit you mentioned. It's time for new plastic around the windows anyway, the old stuff is getting rather 'old'. plus while i was working in the room i swear i heard the plastic move because of the wind. or maybe it was just me cleaning too fast heck at this point i'd give up all the light in the windows just to have them wind proof but instally styrofoam would be a last ditch effort. regarding the mold i'm actually fortunate in the spare room. it's not on my 'stuff' just on the one closet door and a small wooden cabinet. whereas in other rooms like the kitchen it was on some infrequently used pans etc. really gross. In one closet a coat had to be tossed because of the mold. Who knows, maybe the cold breeze in the room actually helped keep the room 'dry'. i think ill hold off at least until it gets bitter cold and i've done the inexpensive steps you've mentioned to see how they help out. also the thermostat is far from the bedrooms so even with the cold air, i dont mind that part of the house being colder than the other side. matter of fact i joked after i insulated that the darn boiler didnt fire up so often and the bedrooms were colder than the living room thanks again