Where are my carpenters? Window sill replacement...

630 Views | 3 Replies | Last: 23 days ago by Dogdoc
Jason_Roofer
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I have a couple of window sills like this. I may have asked before, but I can't recall. These are original to the main house. Yes, they look bad, yes, they have been worked on by a couple of generations. These are cypress and well over 100 years old. They held up OK. But, they need to be fixed now. I can re-point when I am done, but I am not quite sure how to fix this. From all of my research on historical restoration, it seems the accepted practice is to simply cut it out to good wood, and mill a new piece. Then seal well, and attach to the good wood of the original. The stone underneath is hand hewn and sourced on the property and is about 20" thick. So, there is no removing the old sill, I don't see a way around that.

Has anyone done anything like this? Am I one the right track? Questions:

1.) Should I surgically cut out the rot, mill a new piece of wood?
2.) If so, what wood should I try to find? And...cutting down a cypress tree, and shaping it with a draw knife seems a bit extreme, so I'd like to just get what i need somewhere.
3.) What about epoxy products that 'fill' instead? I saw it on This Old House, you dig out the rot, fill with epoxy, shape it, paint it, etc. I'm not convinced it's a good way to do it, but technology is ahead of me.
ABATTBQ11
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AG
Post a lot more pictures of what's around this area and how this sill is put in place. That looks like quite a bit of rot, and it's really hard to tell how deep it goes or how this might come out or be replaced.
BenTheGoodAg
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AG
If I was in your shoes I'd probably try to replace the whole sill. The rot looks pretty deep. Not sure I'm convinced I could cut it down to good wood cleanly enough to attach new lumber properly. There's several videos on cutting out a sill with a multi tool.

I'd try to stay with cypress. Though it's not strictly a hardwood, your best bet is a lumberyard that specializes in hardwoods. Not sure how thick that is, but given the age, it probably doesn't match typical dimensional lumber and you might have to plane it down to the right thickness. I'd figure out how to procure and plane down the lumber before I did any cutting.
Dogdoc
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AG
Elder hardwoods specializes in cypress. They are located close to Fredericksburg.

https://elderhardwoodsinc.com/
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