Many windows, maybe many different parts, but let's start here

Question

Of the dozen or so windows at our church, only about four will now stay open. They may be of different types, but can we start with one? I know nothing about these, so will need some guidance on both parts and procedures.

Really appreciate your help.

Tom · Accepted Answer

Hello! I think we can help with this project, yes. Looking at this photo it appears that you have a tilt window. Can you verify?

If so, then I'm highly confident we have parts that you can use to repair this window. The main two options for the balance would be either the 3/8" diameter Series 900 or 9/16" diameter Series 600. These are the only sizes used on tilt windows, so your next step should be to measure the diameter of the outer tube to determine the better match. This tube will be either metal or plastic and will be covering the spring; don't measure the spring itself.

It also looks like you need a pivot shoe, which connects the balance to the sash and allows for the tilt action. I'm afraid it's too obscured for me to ID, though, and there are many, many possible matches. If possible I would like to see a photo of your shoe out of the window and shown without obstruction. An undamaged version would be best. I will also need to know its width and thickness.

Finally, please disregard the above advice if your windows are non-tilt. Just let me know if that's the case and we can switch tracks.