Most carpet cleaning companies provide both commercial and residential service. They generally however specialize in one or the other and add the second service to supplement their income. For this reason, I generally suggest that if you are needing a commercial carpet cleaning, you look for carpet cleaning company that specializes in commercial work. This is your best option for a variety of reasons.
The main reason to choose a company that specializes in commercial work is that you are much more likely to get the work done when you need it. Because the bulk of their work is commercial work, they have crews that are more capable of working during off hours. In most cases, commercial buildings will need to be cleaned at night or on the weekends and if you hire a company that mainly does residential work, they will have to coordinate schedules to get this accomplished. Commercial cleaners however will have crews who are accustomed to working nights and weekends exclusively.
Another reason to hire a commercial company is that they will have methods that are more appropriate for commercial work. Residential cleaners might adapt their systems to do commercial cleaning but rarely have the specialized equipment that many commercial buildings need. An example of this is that many commercial cleaners love systems such as the Cimex which is an encapsulation machine that can clean thousands of square feet in hour. This can get bids down to a reasonable price which will allow for more often cleaning of commercial carpeting. Commercial cleaners are also more likely to have equipment that can be used in a locked down environment such as in a bank or other building were the doors cannot be left open.
Finally, companies that specialize in doing commercial work will often carry higher insurance coverage. This is important if the worst were to happen and something became damaged. Residential cleaner will generally carry a lower limits of liability coverage while a commercial cleaner will carry millions of dollars worth of insurance.
As you can see, there are many reasons to choose a company that specializes in commercial carpet and upholstery cleaning. So next time you need your carpet, upholstery or cubicles cleaned, call the company that specializes in this type of work.