Do your homework and do some researches. A contractor who has referrals should be considered. You have to ask your family members or friends who have repaired their homes or built new homes in recent times. So you will know what to expect and you will also be able to make the list of the contractors shorter in this way. Another helpful tip is to search online for the review sites where you can get the reviews of the builders. . There are some websites where the service providers post reviews about themselves and most them are fake so you should be careful while checking the online sites and should only get info from a good website. Photovoltaic