If you know about the different types of blinds before you contact blind installation companies, it will be easy to know if a company is trying to overcharge you. Also, knowing which blinds you want will save time that you would have spent in consultation. Keep in mind that the U.S. Department of Energy recommends highly reflective blinds since they reduce cooling costs in the summer.
While most states don't require blind installers to be licensed, some states may require that installers have general contractor licenses to perform this service. Become acquainted with the local regulations in your state, and make sure that you only select companies that are fully in line with the mandated requirements. The chance of injury or property damage when installing blinds is low, but it's also important to make sure that blind installation companies are fully insured.
Look up any companies you might work with online and read their reviews. Then, reach out to the companies by phone and ask for customer referrals. Be wary of companies that refuse to provide referrals.