Do hot summer temperatures cause foundation cracks. In a word, yes. Or at least the hot weather often does. We had a call recently from an old client, saying he had some cracks down the side of the hose where the new extension butted the house. A structural engineer visited the house to determine the issue. It was put down to the hot weather we’ve recently had causing the soil to shrink and pull away from the foundations. The shrinkage can cause foundations to move, making cracks even bigger.
