Report Drying lumber in The Wood Posted December 25, 2018 Moving green lumber directly indoors, especially in the winter is not the best move. Wood needs to dry slowly or it will check/crack/split if there is too great a moisture differential between the interior and exterior of the board. Best to sticker green lumber outdoors, covered, with good air circulation until it reaches equilibrium (varies by locale). At least a year per inch of thickness. Then move indoors to acclimate. I normally move it into the shop an let it sit another year or more. Need to plan ahead!