I am trying to repair a broken window pane but all the do it yourself
info applies to wooden windows that use glazier points and putty. My
windows are aluminum and the pane has what appears to be snap-on
plastic molding around it. Most folks say that all you do is use
silicone caulk around the frame of the window pane, set the glass in
the frame on the caulk bead, and then snap in the plastic molding
(after cutting it with miter corners). All the scuttlebutt is that
this is an easy repair but I have a few questions about the details,
and as we all know, the devil is in the details?
What I am unclear about are the following items:
1. How much clearance around the pane is required for the plastic
molding to fit properly? Is it the same as recommended for wooden
windows (i.e. cut the pane 1/8 inch shorter in length and width)
2. Is silicone caulk the proper sealant to use between the window pane
frame and the glass? The existing material, although nearly 20 years
old, seems to have a tarry consistency and is black in color.
3. What actually holds the pane in place--is it the caulk or the
molding or both?
Thanks for any help.