41. Liability of builders and contractors.

A builder who is not the owner of premises is liable to a tenant or a member of his family who is injured in consequence of negligent construction1. Whenever a contractor, or a landlord during the lease, installs appliances on the premises, or a contractor executes repairs, or a contractor or a landlord during the lease commits an act of misfeasance, whether or not in the course of a dangerous operation, he owes a duty to those on the premises to take reasonable care for their safety