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Proformance Manufacturing, Inc. is a leading supplier of high-quality fiberglass window products that provide comfort, beauty, energy efficiency, and durability. Our ECOSTAR TM and ProStar TM windows are designed with future generations in mind, offering ultra-low maintenance, excellent insulation properties, and superior contraction/expansion properties. We are committed to sustainability, using locally sourced materials and employing local talent. Our windows are perfect for homeowners and contractors seeking premium products that meet their energy-efficient and sustainable goals.