Retrofit window - void between vinyl and alum frame?? - DIY Chatroom

pcl586 · 11-03-2009, 02:26 PM

hello everyone

Got a quick question in regards to the void left in between the new vinyl frame and the old alum frame. Not within the alum tracks, but the space left between the old frame and the flush fin/stucco fin. I attempted to depict the area in question with the follow image (red area). Do you insulate that void or leave it "empty" to allow water/moisture to escape??

Also, I wanted to "build" a better "foundation" for the new windows to sit. I was thinking about using low exp foam to fill the alum tracks and square off any excess foam (any foam above the highest tracks, all four sides) and then setting, shimming the retro window in place. So the window would be supported by the highest parts of the track and foam. My thought was to allow the foam to cure without the window in place to avoid any over expansion and bowing of the new windows (since I'm not a pro at foaming). This wouldn't give the window the best "seal" but could help avoid breaking my new windows from the start. Any opinion on this??

Really leaning toward the Simonton Impressions 7300 BUT I cant find someone who will sell them to me...the search continues...Thanks!

Ron6519 · 11-03-2009, 04:17 PM

The replacement window should have been measured so that the window would be seated on the two sides and top. The actual window should project past these stops. There should be no space on front of the vinyl window and the aluminum frame. If you have space on the sides of the window, this is normal. There should be 1/4-3/8" on the sides for adjustment. This area should be shimmed and then insulated. If you like foam, use the low expanding product made for doors and windows.
Ron

pcl586 · 11-03-2009, 06:28 PM

Thanks Ron for the feedback...the new vinyl window would be resting on top of the alum tracks (back away from the outer frame) and thus leave a void between the outer track wall and the outer vinyl fin. wouldn't it??

Ron6519 · 11-03-2009, 09:12 PM

Quote:

Originally Posted by pcl586

Thanks Ron for the feedback...the new vinyl window would be resting on top of the alum tracks (back away from the outer frame) and thus leave a void between the outer track wall and the outer vinyl fin. wouldn't it??

This is not the way to install these windows. There is no way to keep the water out by, "filling in the space".
The window needs to be installed in a way that seals the window from water intrusion. Using a replacement window that sits in the aluminum frame might work, it depends on how you could seal it and cap the top.
You can't just get a window close in size and make it work.
Ron