I bought some certainteed Bryn Mar II vinyl double hung replacement
windows.... they have a inch wide/deep slot that runs the outside
perimeter of the window. It looks like it was meant to receive the
siding, is this correct?
In any case, does the whole window sit inside the wooden frame, or do
you slide the window out so the siding butts up against the window/J
channel.... and so the drain holes in the outside sill hang out away
from the house(so they drain away from the house)?
...When I removed the original window, I had nothing left except the 2x4
studs that make up the frame. Then of course, you have a half inch of
plywood, and the siding.
The original window butted right up againt the aluminum siding. So when
I removed the original window, I needed to do something with the
siding, like put a j-channel all around the perimeter.
If I have the window sit entirely on the frame stud, then the sill of
the new window, with it's drain holes, hangs over the plywood -not
You might not have bought the right window.
The frames come in many profiles and depths.
Is the new frame as "thick" (inside to outside) as the old one ?
But you have to get it out farther, so water is not going behind the
Or make up a vinyl or aluminum sill extension.
Then you may have to build up the frame inside, level with the
Check again where you bought it, they are the ones who are going to know.
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