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Old 08-19-2010
jedlls jedlls is offline
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Wet balsa core

How much moisture in Balsa core can be tolerated?
How do you evaluate moisture content and do as little cosmetic damage as possible?

I got a moisture meter, found 2 wet areas on the cabin top, what's next?
Drill a few 3/16" holes in the outer skin and see what's in there?
If it's not black and rotting or empty in the core persue the drill holes and to dry out the core?
If it is rotten then:
1 cut off the outer skin, grind out the rotten stuff; re-core; replace skin as per Don Casey's book?
or
2 Can the hole drilling to dry out core method be used over anti skid?
or
3 If the area of rot is small; forgo the grinding and just rasp out the rotten core area (6" x 12"); flush with acetone then 202; pack the space back up with structural putty; and have a lot less cosmetic work. I can access the damage from the improper fitting holes that allowed the water in.

Can anyone give me advice? Could you also relate your experience?
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