Who is responsible for stress cracks in foundation and in garage floor in center unit of a 4 unit condo? We have a new 18 unit sub-division of private homes being built quite near us. The ledge had to be blasted out and the drilling company came and inspected our units, took pictures etc. In case there were any claims. One of the owners was away for a month and when they came home they said that their were cracks in floor and in foundation. Blasting company did not take pictures of foundation or garage floor and said they are not responsible for stress cracks. Could this be true? And who is responsible for stress cracks? The owner or the condo association under common area. Thanks in advance.