In our rented house there are old Jalousie windows (the kind with glass slats). When I was looking for ways to seal them better (it's getting cold here), I came across this:


However, the product matches 3/16" thick glass, whereas our windows are 1/4". Any chance it will fit anyway since it's Vinyl?

Any other suggestions for sealing Jalousie windows?


At the cheap end, I've seen a combination of duct tape and Visqueen used effectively. Interior storm windows are more costly but offer a different aesthetic. For long term thermal performance, replacement is probably the best course but comes at the expense of what jallosies provide during open window season.

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Shrink film - works irrespective of window type. Apply doublestick tape around window frame, apply shrink film, heat with hairdryer or heat gun to shrink, remove in spring. Quite clear, quite effective, not very easy to remove/replace if you decide to open the windows in January, though it can be removed/replaced with care if you don't trim all the excess film when installing. "Shrink film window kit" will find a vast array in a search, or try your hardware store.

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I believe that if you purchased the 3/16" style of the vinyl strip and tried using it on 1/4" thick glass that you would be extremely disappointed with the result. The strip will likely not stay in position trying to pull it over the edge of the thicker glass. And even if it did a half-baked job of staying in place the flap that is to seal against the opposite slat will be cocked at a strange angle and may not even allow the slats to close properly.

I would search out a similar product made specifically for 1/4" glass slats.

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