They measured one day...it took about an hour. Then they ordered the style of tub surround we chose. About 2 weeks or so later they called to tell us that the tub surround was ready. Then we scheduled a date for the installation. On that day, early in the morning, the installer arrived and began the work. A couple of hours later their plumber arrived to do his part of the job (install new bath and shower controls, etc). By mid to late afternoon, the job was completed, and it turned out great! I would highly recommend this company.