The coiled balance springs on the upper sash of one of my
CertainTeed windows needs to be replaced. The number stamped
on the spring is 335.
However, following the formula in your
DIY guide, "Choose the Appropriate Coil Balance", the result
calls for a 6 lb. spring (336 coil balance spring).
Which
one should I use?
Using The Correct Coiled Balance Spring

Home Owner from Passaic Park,NJ
Apr 4, 2012 11:24 am
2 Replies

Paul from SWISCO
Apr 4, 2012 2:19 pm


Thanks for posting! We always recommend that you order the original spring number the window manufacturer used, unless the spring was too weak to hold up the window sash.
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