Old Pella Windows with interior sash


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Old 09-11-21, 10:56 AM
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Old Pella Windows with interior sash

I have old Pella windows with the removable interior sash. Rather than replace the windows I want to remove the exterior single lites and replace them with double glazed sealed units. Frames are all in great shape, would just need to replace the interior wood stop. Frames are all in great shape, would be cheaper than replacing the windows. Anyone out there ever done this type of conversion to this type of frame?
 
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Old 09-11-21, 11:10 AM
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I've worked with windows for most of my 30 years in carpentry. I vaguely recall replacing the glass once in an old wooden Pella sash that "looked like" it simply had a removable interior stop around the perimeter. Turned out it was not a removable stop it was simply shaped into the frame with a shaper. It had to be scored with a utility knife and then carefully chiseled off... And the glass and stop were set in the worst, stickiest chewing gum type of sealant you had ever seen. It was a nightmare. The sash must have been assembled in the factory by putting the 4 individual pieces of the sash onto the glass perimeter.

In short, I would not recommend trying it. You could easily end up ruining the sash.

But I don't know if what I am describing is what you have. If you could upload a photo of the window and a closeup of the interior trim, maybe that would clarify what window you have.
 
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Old 09-12-21, 05:01 AM
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In the years I worked on windows I replaced a glass in a Pella window once and if I remember the stop was may have been glued to the sash and I had to carefully score it with a utility knife. Don't do it!!
 
 

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