My son bought a house that has a window like this one.
When I push in the center from the inside, there is some play of a quarter of an inch or so at the bottom (and the top I presume). Maybe more. What does this mean? Was it not installed properly? Is there some part that needs nailing in the center? How difficult is the fix?
There is no caulk around it but the window is original, I think.
EDIT: The rumors of how much play is there were greatly exaggerated. The amount of give at the bottom and top of the window is just about 1/16-inch in the center. Still, is this too much?
Best Answer
It's hard to tell exactly what the problem is, but it certainly doesn't sound right. It may be that you have a mulled window (here's a video about mulled windows), and perhaps the flanges were not nailed in or the nails missed the (rough) sill or header.
I think that the place to start would be to remove the siding under (and around) the window to get a better look at the problem. Here's a quick video about working with vinyl siding.