Although control joints will help with cracking in most cases, it is not uncommon for concrete to crack in places other than the control joints. Concrete shrinkage, frost upheaval, and settling can all be culprits. Any micro-cracks can be exacerbated by the expansion and contraction of water and ice due to Alberta’s rapid freeze-thaw cycle. Cracks can also be caused by tree roots under the driveway, or by excessive load-bearing items.