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Oak woodworm damage

5K views 8 replies 6 participants last post by  Tennessee 
#1 · (Edited by Moderator)
Hello, folks. Sorry for the long-winded first post, but it's a long and painful story. There are a lot of "could've / should've" comments to be made here, but this is the situation I'm in…

Purchased enough 16/4 kiln dried (supposedly) clear and kiln-dried oak for the purpose of making a replacement window frame for our ca.1773 house. Material was purchased rough, milled and finished to size, and then mortise & tennoned to make the frame. During the milling process, I noticed a good bit of woodworm damage (powder post beetle?), and I arranged the milling of the various components such that it would be hidden back inside the wall when complete.

However, I was not able to hide all of the damage, and so exposed areas do have many smaller worm holes. All holes (in both the extensive and lightly damaged areas) are currently filled with what I assume to be the feces of whatever bug was formerly present.

I also assumed there was no active infestation, but while trying to research what to fill these tunnels with, I found several bits of information cautioning me that this is not a safe assumption. My wife found a product called Bora Care, with which she is suggesting I paint the timbers, which will obviously delay my install another week! Her reasoning is a few statements we've read, stating that sometimes kiln drying does not kill all, and that infestation often happens at the dealer after kiln-drying.

Questions:

1. Is it normal to see this damage in clear oak? Should I expect any recourse with the lumber dealer? I know of only one dealer in my area who sells kiln-dried oak in 16/4, so I'm sort of relying on these guys.

2. Should I delay the project long enough to treat the lumber?

3. What to do about the powder-filled holes? Must I gouge them clean and fill, simply prime over them, what?

Thank you!

Overall frame construction:
Wood Wood stain Hardwood Flooring Gas


Construction detail (prior to draw-boring):
Table Wood Floor Hardwood Wood stain


Light damage on exposed part of sill:
Brown Wood Wood stain Natural material Hardwood


Heavy damage on portion of stile to be hidden inside wall:
Wood Trunk Wood stain Woody plant Hardwood
 

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#3 ·
If you bought clear high grade oak you didn't get what you paid for. I would talk to the dealer. When I buy rustic grade lumber that is what I would expect.

If it is kiln dried most better lumber dealers run the kiln in a bug kill cycle. If that is the case you should ok.

Good luck
 
#4 ·
Powderpost beetles. If the wood was kiln dried and then stored in a shed, barn, etc, the powderpost beetles could have infested the wood after it came out of the kiln. They love oak.
 
#5 ·
The coloring of this timber was dark when I bought it. Not sure if that happens in the kiln, or if it's a sign it had been sitting around at the dealer for a long time. The darkness didn't go deep, and was gone with a pass or two over the jointer and planer.

I think I'll avoid this dealer in the future, and seek out another source for 16/4 KD oak. I know of two other dealers in the area that will mill oak 16/4, but they only sell green.

If anyone knows a dealer carrying 16/4 in northern Bucks or Montgomery County (PA), I'm all ears!
 
#6 ·
Before the adults mature in the wood and bore out leaving the frass filled holes, you cannot tell if the wood is infested. I spray all green oak with a Disodium octaborate tetrahydrate solution (a borate salt much like borax) immediately after sawing the lumber on my sawmill. This prevents any infestation from every occurring.
 
#7 ·
So you should spray with BoraCare when the wood is still moist? I am using green pine in a shed now. Can you stain with oil base, while wood is still moist as well, or wait till wood dries to apply the stain?
I hate to tag this comment on another post, but am having trouble posting here, new to site forum
Thanks
 
#8 ·
The chemicals in BoraCare, the borate and the other ingredients are water soluble and should be OK to use on the green wood if you let it soak in good. I would not put an oil stain on wood that is green or not reasonable dry.
 
#9 ·
I agree with rrww. Plain and simple, you did not get what you paid for. Some of that wood is beyond use. I've pulled old oak out of barns for free in better shape than that one piece. As for the beetles, posts above tell how to control them, but I would have a hard time even using that wood. Just an opinion.
 
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