so im about to replace the hopper/awuning style windows in my basement. I ripped out one of the old wooden frames and it would appear that im in for more than i bargined for. THe bottom was rotten so im glad i got that out but the window measures your standard 15x32. This is all fine and good but it would appear that there is a "cap" of concrete on the blocks to which the frame was set in. It is about an inch thick or more easy. Do i want to smash this out and lay my new windows right on the cinder block beneath? This cap is at a slight angle and from the inside of the house slants down at a 45 degree angle. Im not sure why this was done 50+ years ago but maybe that is how they set basement windows back then. If remove this troweled concrete wont i have access directy down into the holes of the cinder block? Id assme this cap is there for a reason. Mabe ill leave it and square it up as much as possible. No idea here.

With a stucco home, it really isn't practical to simply change out an entire window frame without having to do involved repair on the stucco. I would like to change from single pane glass to double and was wondering if there exist such a replacement where only the top and bottom window portion can be replaced from single to double without having to replace the frame. Does something like this exist or does the double pane throw off the entire window frame?