I am curious how much checking effects a timber? I have not been able to find much on the topic. I am under the impression that up to a 1/4" is ok, am I right on that? I have customers ask all the time but really don't know the answer to this one. I use mostly Douglas Fir, Pine or Larch. Also, is there a way to tell if the timber is going to check before it does, to try and cull out the trouble ones?

Thanks,

Tim