A Web-based method for identifying matching or comparable siding materials for use in construction repair, remodeling and the like. The method employs an online computer network such as the Internet to provide access to a database of siding materials organized by siding profile and grain information--including such information not only for currently available products but for discontinued products--from different siding manufacturers. When performing a search for siding matching a given sample, a user accesses the database, selects a desired profile based on visual similarity between the sample and images of siding profiles stored in the database, and then selects a desired grain type based on visual similarity between the sample and images of siding of various grain types for the selected profile. The database preferably also contains a color specimen for each siding profile and grain type for visual comparison of color.