Cedar Fencing - Fence WorkshopAs a rule, any pine privacy fence can be upgraded with cedar pickets. ... cedar is not likely to warp. cedar lumber is much more dimensionally stable than pressure treated pine lumber. Whether used horizontally or vertically, cedar lumber excels at holding it's shape. 2. Decay resistant. western Red cedar has a life span of 800 ... Due to its underground weather-ability and lower cost, we suggest that pine posts still be used when constructing your cedar fence here in the Southeast.