Casey from SWISCO responded:
June 22, 2017
Thanks so much for your question. To better help you, can you please send us some photos of your original balances including the top and shoe? I need to know if you have a tilt or non-tilt window, plus the width of the channel and the length of the metal part of the balance.
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Paul from SWISCO responded:
June 26, 2017
It might not be the weight. Usually, when the spring strength is an issue, the window either droops when it's opened, or it creeps up when it's closed. When it stops short of closing, I find the issue is actually the length.
I would double check to make sure the length of the new and old balances are identical. Also check where you placed the bottom balance hook. Some window manufacturers punched out two holes on the side of the window track. The bottom hole is for the bottom sash and the top hole is for the top sash. I've personally installed the hook in the wrong hole, only to find the balance's travel reduced, but fortunately it's easy enough to fix by just putting the hook in the right hole. |