Re: Re: Insulating old windows

On the matter of overhauling the existing steel frames, you could do a lot of this preparation work yourself (wire-brushing and the like) before passing them on to a galvanizing company.
This is assuming that the frames are indeed redeemable, something one can’t take for granted – especially if your house is near the coast where salty air would disrupt the process of passive oxide fim formation on the steel.

Could you gingerly take out one typical window, strip out a pane or two of glass, examine the grooves and edges ? Then maybe you could post on to this thread some photos, preferably including a ruler in the photos so we can judge the dimensions.