Restore or replace vintage windows?
I’m considering three options to improve the performance of the 10 double-hung windows that remain in my 100-year-old house in Zone 4C: replacement with inserts; retrofitted weatherstripping; storm windows.
My understanding is that replacement windows cannot be rationalized on the basis of reduced heating bills. Rather, the argument for replacement windows turns on comfort — the reduction of air movement and of radiation makes it more pleasant to be near them. Questions: How much more comfortable is a replacement window than a well weatherstripped vintage window? How much help is a storm window? How does one measure and predict “comfort?”
A couple of specific questions about window restoration:
In a FHB article, the author claims that, with the use of weatherstripping from Conservation Technologies, a restored old double-hung can be rendered “as weathertight as anything being made today.” Has anyone installed these products? Are they as effective as the author claims?
The weight pocket of a double-hung must allow a lot of air to move. What if I removed the weights, filled the pocket with foam, and installed a Pullman spring balance to operate the sash? Has anyone used this method?
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