My double-hung window bottom sash drops down and does not stay up. The balance assembly are broken.
The parts needed look similar to this post:
https://www.swisco.com/discussions/New-window-coil-balances-for-Certainteed-window-77-257431
The plastic cover says: Certain Teed.
The two coils say: 407 U.
And the bottom sash weighs about 15 lbs.
Please provide a price quote for replacement of a complete set of parts, for both left and right sides.
Thanks,
Gregory