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Tom from SWISCO responded:
November 18, 2016
I'm not sure what it is you have, so I can't say for sure. Is there a specific SWISCO Series balance you were looking at? Also, a balance stamped with 28D should have a different length than a balance stamped with 29D. Your issue sounds like the spring is too strong, which wouldn't be fixed by installing a longer balance. Keep in mind that these stamps are not part numbers, or identification numbers, and should not be considered as such. They just indicate a few physical aspects of a balance, but there is much more that goes into identifying a replacement balance than just going off of the stamp.
I think at this point it would be best if you show me a picture of your balance so that I have a better idea of what you're working with. Without anything to go off of as a reference, I cannot make a confident suggestion. |
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Tom from SWISCO responded:
November 21, 2016
Did they only just start pulling up like you describe, or has this always been an issue? Also, what is the weight of your sash?
Most channel balances have a lifespan of 5-10 years, depending on how often they're used. If yours are 16 years old, then it could be they're just old and the springs don't work like they used to. |
