GAF Materials Corp., Wayne, N.J., has redesigned its Web site, making it more user-friendly for homeowners and property owners. For property owners, the Web site offers factual information, helpful maintenance instructions and tips on how to recognize potential problems with clear-cut, colorful illustrations. The site allows homeowners to understand how roofing systems work, find the best materials and safest warranties, and find the right contractor. Homeowners can also enter their zip code to find a list of Master Elite Contractors in their area, as well as request quotes online.