Firstly, let me thank all who contribute here. Reading these forums has been tremendously educational! We moved into a new house about a year ago and are in the process of cleaning up the property. The previous owners had obviously cleared some trees a while back as there are several wood piles on the property with most of the wood gone seriously to rot. I've come across some rounds in one of the piles that I'm not sure are worth splitting and burning. Right now we use one of the fireplaces in the house for "decorative" fires (my wife likes a nice fire) though I'd like to install a wood burning insert to supplement our furnace (natural gas/hot water radiator. Are these rounds worth splitting? And if so, do I just scrape off the growth on the sides? Thanks again for all of the insights & experience that people share here.