What room RH = 4%MC?

[Farrell]

Wood MC depends on BOTH the temperature and the RH. Although for shimming, 
I'm not sure it really matters. I think the target is to dry it down enough 
so that the cracks enlarge - then shim to your heart's content.

Terry Farrell

----- Original Message ----- 
> I'm doing my board work/refinishing in a little
> aluminum "Handi-House", in the backyard, with
> dehumidifier installed. Is 4% MC good for crack
> shimming ? What RH would that be, or what would you
> recommend?
>     Thanks!
>     G