【正文】 low Ufactor, the ultimate determinant of energy efficiency, helps lower building operating costs and increase occupant fort. Filling the fiberglass frames with foam insulation and glazing the windows with highefficiency insulating glass adds substantially to window performance and to energyefficient window strategies including passive heating and cooling and maximum daylighting to dramatically cut energy load and increase occupant fort. Decorative options. Fiberglass is eminently paintable, and takes paint easily with excellent adhesion. Fiberglass can acmodate liquid coatings such as water and solventbased acrylic enamels and polyurethanes as well as dry powder coatings。 Durable factoryapplied color options Fiberglass Used in marine and industrial applications for years, it is only recently that manufacturers have been able to produce the plex profiles required for window designs. As a window frame material, fiberglass is known for its strength, durability and performance. It is inherently chemicalresistant and impervious to water, cold, heat, insects, the corrosive effectives of salt air and pollutants and deterioration due to ultraviolet rays, moisture, rot, oxidation, rustall the traditional enemies of windows and doors. While wood, and to a lesser extent, vinyl and aluminum windows, can result in problems with warping, rotting, cracking, bowing and shrinking, fiberglass has a lack of brittleness, deterioration of surface finish and the highest resistance to warping and twisting. Throughout any climatic environment, fiberglass stays rigid, stable, and practically maintenancefree. Unlike wood, fiberglass frames won39。 Strong and durable Requires maintenance Strength. Fiberglass provides the strongest window material, with experts maintaining it is some threetimes stronger than aluminum and nine times strongerthan vinyl. According to the American ArchitecturalManufacturers Association (AAMA), fiberglass profiles have roughly the same strength as steel (based on tensile strength). Its strength enables fiberglass to be fabricated in large sizes, acmodating large expanses of glass without requiring added support or reinforcement, making large picture windows possible and energyefficient High strengthtoweight ratio. lts light weight gives fiberglass a high strengthtoweight ratio, adding to its suitability for large, plex profilesbenefits in both maximizing daylighting and enhancing historical accuracy m restoration projects. Aluminum Because of their rigidity, durability and narrow frames, aluminum windows can be configured into a wide variety of binations that maximize views. Aluminum windows are lowmaintenance options, and will not rust or rot. They are available with tough anodized or bakedon finishes. The downside of aluminum windows in the past was the lack of energy efficiency. Aluminum readily conducts heat and cold. In cold weather, a building39。 Noncorroding for example, titanium dioxide allows the product to weather better, thus preventing it from yellowing. Differences in the vinyl recipe used and how vinyl parts are formed will determine the structural strength and insulation performance. Vinyl39。 Providesexcellentinsulation Doors It used to be that wood windows werevirtually ubiquitous,but technological advances have generatedalternatives with added benefits. Developed in the late 1980s to meet demand for lower maintenance and higher performance,fiber glass windows are now gaining traction nationwide. The AAMA/WDMA 2020/2020 . Industry Market Studies show that while demand for all types of window units dropped a staggering percent during the 2020 to 2020 peaktotrough economic downturn, market share for fiberglass window units nearly doubled from percent to percent. That share is expected to reach percent in 2020 as the global green building movement spurs ever more demand f