Stuck! replacemente window installation

Old 08-18-05, 05:15 PM
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Stuck! replacemente window installation

I'm installing american craftsman replacemnt windows. I've already removed the old window.

My question is on something called "sill angle". Do I have to screw it down to the sill? or just place where it needs to be and caulk it?

I understand that sill angle will be placed over the sill near the exterior of the replacement window. Should it go towards inside of the window's exterior edge or inside? Or does the window rest over it? I'm a bit puzzled. Please help.

Old 08-18-05, 08:25 PM
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Sill expanders come in different styles. How it is installed depends on the style. If it is shaped like an "L", then the bottom of your window likely has a "notch" on the bottom of the window on the outer edge that this sill expander fits into when you set the window in the opening. If this is the style you have, you run a bead of caulk where the sill expander goes, then set the sill expander in the caulking, and tack it down with 2 or 3 small nails, making sure it is the right distance away from the window stool (usually 3 1/8") . You place a small amount of fiberglass insulation under the window and run a bead of caulk where the sill meets the stool before setting the window in place. When you go to tip the window in, set the bottom in first, tip it up a ways, then open the window and look out to see if it is binding at all as you push the window in. If it is, you can usually wiggle the bottom of the window and get it to drop down on the sill expander. Then push it the rest of the way in.

Other styles of windows don't actually have a notch, although they work in the same manner. Some brands I have seen require the installer to create a notch, which is really dumb.

Most vinyl windows I have seen lately have a snap in sill expander that goes on after the window is installed. They get cut to the correct size and get snapped onto the front of the window, into the notch provided.

So I don't know if any of that helped, but maybe it will get you going in the right direction. You probably already have the window in by now anyway.
Old 08-19-05, 05:38 PM
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American Craftsman

On american craftsman windows the sill expander goes on the inside then put a bead of caulking to seal out the water.


Last edited by majakdragon; 09-07-05 at 08:57 PM. Reason: AD

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