I want to add another glass to my existing windows to make it a storm window with a 1/4 space.?

Answer 1

If your window frames are wood this is easy and practical. I have done it in construction projects overseas where thermal panes are unavailable.
1. Get quarter inch furring strips, a roll of quarter inch felt stripping, and some double headed nails.
2. Tack furring strips with felt under them snugly against your old pane.
3. Tack the new pane snugly up against the old pane.
4. One side at a time simply tack furring strips tightly against the new pane.

This allow the "storm window" to breath and not fog as well as stopping any existing drafts. Make sure the felt and furring strips have no gaps around the perimeter of the pane. If you use a sealant on the strips do it before you tack them in or your window may not be able to breath and will collect moisture from condesation. Good luck.

Answer 2

Not sure that would work. Thermal pane windows have 2 or more panes but they also have an inert gas in between each pane so that condensation doesn't form. It would be a major project to take out each window, disassemble it, cut a cerf for a new pane, reassemble and re-install in your house. It would be almost impossible to do all of that plus suck out all of the oxygen and add one of the inert gasses. I would opt to save my pennies and change out your windows with double or triple panes as you can afford to.
D

Answer 3

Hmmmm. I think I would just change my windows out or have storm windows put over the existing windows.

Answer 4

that doesn't sound very practical.