SLIDING GLASS DOORS The Learning Center Aluminum doors have been losing favor because of their poor energy performance. Vinyl doors are low maintenance and energy efficient. The tough vinyl frames are easy to maintain and they look new for years. The color goes completely through the frame, so it looks good even with small scratches. Look for fusion-welded corners, metal reinforcement inside the frame, and ball-bearing steel or nylon rollers. Most vinyl patio doors offer Low-E insulated glass and factory installed weather- stripping for maximum energy efficiency. Wood sliding doors are normally the highest quality and the most expensive patio doors. Wood patio doors offer the same natural aesthetic qualities as traditional wood doors with the added bonus of a full view through the large pane. Unless they are clad with aluminum or vinyl, wood doors can be a continual maintenance problem.     2. What types of sliding glass doors are available? < back to list of questions about sliding glass doors 3245 Miracle Drive Murrysville, PA 15668 724-387-2991 PA Contractor ID PA001856