If I hire someone from a hardware store such as Home Depot to do a home improvement work, will this hardware store be responsible for any mistake take place by this technician.
It has been my experience that these contractors are independent from the store. In such a case it is unlikely that Home Depot can be held liable. There should be a contract which lays out the relationship of the contractor.
That said, depending upon specific circumstances, there may be some liability if Home Depot endorses the specific contractor or acts as a general contractor. If addition, if the person is an employee of Home Depot then Home Depot is liable.