Sash too heavy after rope replacement?
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mkothe



Joined: 29 Aug 2008
Posts: 2

PostPosted: Fri Aug 29, 2008 10:43 pm    Post subject: Sash too heavy after rope replacement? Reply with quote

OK, so I finally started working on my windows, and noticed something funny: After I replace the rope with chain, the top sash keeps sliding down, when it was just fine with the rope. I have added more than 3oz of nuts to the weights and the sash still slides down. The same ting happened on the first two windows I worked on. The chain is about twice as heavy as the rope, so if anything, the sash should stay in place if it is up and all the chain is in the pocket... Could it be that there is less friction with the chain? The bottom sash is fine and stays put when the chain is in place. I would like to understand this, so I don't have the same problem with all my windows.

Any help is greatly appreciated!
Michael
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johnleeke
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Joined: 20 Aug 2004
Posts: 2975
Location: Portland, Maine, USA

PostPosted: Sat Aug 30, 2008 5:05 pm    Post subject: Reply with quote

Does the upper sash have the same glass? If you put in new glass that is thicker than the old it would weight more.
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mkothe



Joined: 29 Aug 2008
Posts: 2

PostPosted: Sat Aug 30, 2008 5:12 pm    Post subject: Reply with quote

No changes have been made except for replacing the rope. I also cleaned the windows, so the sash should weigh less now :-)

Another thing I noticed is that the sash sags a little bit at first after beig pushed all the way up, then barely stys put, but with the slightest touch it continues to slide downward. I checked that the chain is not too long and the weights do not touch the bottom of the pocket, so I don't know why the window would drop...
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johnleeke
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Location: Portland, Maine, USA

PostPosted: Sat Aug 30, 2008 6:21 pm    Post subject: Reply with quote

hmmm...it must be that the chain has less friction than the cord.

See this discussion about add-on weights for a solution:

http://historichomeworks.com/forum/viewtopic.php?t=1180

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sswiat



Joined: 01 Sep 2004
Posts: 231
Location: Cambria, New York

PostPosted: Tue Nov 18, 2008 10:04 pm    Post subject: Reply with quote

A bit late on a reply post but for the future, any chance the upper and lower sash weights were mixed up? Sometimes (especially on different size upper and lowers) the weights can be slightly different.

The best way is to weigh the sash and see if your weights are for the correct sash.
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