Coppola Brothers LLC is a member of the National Association of Home Builders (NAHB). The NAHB is one of the largest trade associations in the United States, representing the interest of home builders, developers, contractors, remodelers, and associated industries. They periodically publish updates to a book called the Residential Construction Performance Guidelines (RCPG) that a quality contractor would adhere to. This booklet is the most widely-used reference guide in the home building and remodeling industry for the performance of homes during the warranty period. If you are interested in learning more about them, the NAHB makes this available to the consumer to look at, if you are interested in purchasing this booklet, please click on this link to obtain a copy of this booklet.