Repair or replace notched window sills?


Old 07-06-12, 03:33 PM
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Repair or replace notched window sills?

I'm not sure if this is the right sub forum, but I didn't see a more appropriate one. All of the window sills on my house were "notched" (had their corners cut off) by a previous owner or siding contractor, when metal siding was installed over the cedar clapboard. When I tore off the siding, and somewhat handy friend of mine tried to make corners pieces that we glued (maybe it was epoxy) into the corners. After 10 years, many of them look horrible, and I think it's time to replace the entire window sill on all of the windows, which I'm thinking will be a big project.

Has anybody else dealt with this? Is there any other good option, short of replacing all of the window sills? Here is a pic.

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Thanks for your thoughts!
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Old 07-06-12, 03:39 PM
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You can buy the entire sill piece and replace it. You will probably find 3 nail indentations ( you may only have one left) on the front of your sill. Cut the caulking across the top of the extension. Once the nails are removed, you can pull the sill off. You will note it will have ridges and grooves where it fits to the frame. Take your piece with you and match it to what the lumber yard has. Most all fit all. You will need to cut the sill extension to fit to the outside of your trim and once installed, drive finish nails to hold it in. Caulk where it meets the window frame.
Old 07-06-12, 04:14 PM
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Hmm you make it sound much easier than what I was thinking. Thought I'd have to remove the entire window casing / frame to get at the entire sill. Don't most sills run into the wall, under the window framing? As you can probably tell, I'm a complete novice at windows

Thanks for the response. I do have a professional coming to look at it on Monday, but was trying to get an idea of my options.

Old 07-06-12, 04:41 PM
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It may be that you have a 2 piece sill.....if so, replacing just the sill nose and a filler behind on the sides may be satisfactory.

Hmmm...I think that may have been what Larry was talking about. Different terminology I think.
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