Wood windows
Several comments. First, there are three main ways to replace windows with new wood windows. One can replace the sashes only with new sashes and a pair of vinyl tracks. Like a previous poster mentioned, you must have an opening perfectly square for the replacement kit to properly function. This option is for double hung windows only. Sine this method does not include a screen, you would also have to purchase a separate screen or a storm/screen combination. The second type is also a double hung replacement kit, but it comes in a retrofit frame that fits into the existing frame, and it normally includes a built-in screen. Even if the opening is out of square, this retrofit replacement frame can be put in square to properly operate. Both of these options generally cost less for labor than the third option. The third option is to replace the entire window unit, which would include the sashes, frame, sill, and interior/exterior trim. It is available with a screen, a storm/screen combination, or neither. Although the most costly for both labor and materials, this method allows the installer to properly insulate around the window frame and seal any potential water leaks or air infiltration issues. The first way works good if done right but would be (potentially) the least effective of the three. The 2nd method is better than the 1st, and potentially the 3rd method is the best. However, all three are acceptable if done correctly. Storm windows, by the way, are not really needed with modern energy-efficient windows, but if you're looking for historical authenticity it might create the right look. Triple glazed is available on clad windows and vinyl windows; it's a bit more difficult to find it on wood-only windows.
As for sound reduction, buying a double glazed, gas filled replacement window might be "noisier" than your original windows. It disappoints me when I hear of salespeople or contractors promise that new windows will reduce outside noise. If you're replacing a double glazed window system (single glazed plus a storm) with a double or even triple glazed window in which all of the new panes are the same thickness, the respective panes of glass are all working to reduce the same noise frequencies and every extra layer of glass will add little benefit. It's a commonly misunderstood issue. To significantly reduce outside noise one pane must be thicker than the other (they would block a greater range of noise frequencies), or better yet one can use laminated glass, which is so far superior to any other noise-reducing glass system in any window.
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