Replies

1. 
   john_c2 | Feb 12, 2021 04:21am | #1

   Resaw a little oversize, because it likely will move, and you'll need to flatten.

   Resaw and stack, placing stickers between each row. Add an extra layer on top, preferably plywood. If you don't, the top piece will lose moisture from above faster than below, and cup.

   Finally, add clamps or heavy weights to the top to keep the whole thing flat while it dries.

   If you don't have a moisture meter, get one. Check the moisture after you resaw, and then when you eventually start building.

   Ideally, you can wait before building after resawing. I'd put it off for a year if I could, or until it stopped losing moisture.

2. 
   rob_ss | Feb 12, 2021 05:19am | #2

   I could not answer this myself so asked some FB friends in NZ...

   Janet McDonald
   from listening to a lot of Woodturners, swamp Kauri is very different from different areas of NZ and what minerals were in the swamp/soil.
   Personally I have cut into pieces that are very gummy and then some that are just dusty as hell. I turned this piece in the photo a week ago and it was beautiful. But just got another piece from another sauce yesterday and it is very gummy.
   My dad had planks of it 50 years old and milled 10cm thick and looked great. But once they were milled again thinner a couple of years ago they were dusty inside and not worth using for a thing.

   Comments

   David Mead
   I was given a small piece back in the 80's.I found that the hand acid reacted with the swamp acidity after I had planed it.That was my experience with it. [it left fingerprint marks on the wood]

   Thanks for using NZ products.

3. 
   _mj_ | Feb 12, 2021 08:15am | #3

   If it has been in your shop for 15 years is is well acclimated, moisture should not be an issue. Joint a face and take a slice to see what it does. No other way to find out.