Irving, Texas-based Builders FirstSource, Inc. (BLDR) is the largest U.S. supplier of building products, prefabricated components, and value-added services for residential construction, repair, and remodeling. With a market cap of $22 billion, Builders FirstSource serves professional homebuilders, sub-contractors, remodelers, and consumers in the U.S. It is expected to release its Q3 earnings before the market opens on Tuesday, Nov. 5. Ahead of the event, analysts expect Builders FirstSource to report a profit of $3.10 per share, down 26.9% from $4.24 per share reported in the year-ago quarter…