Glasfëns ​Window Systems USA ​supplies high-performance windows, doors, and façade systems across North and South America. Our products are based on proven European systems, built in fiberglass and fitted with German hardware, with U-values approaching zero. We also offer thermally broken aluminum for hurricane and high-wind projects. From multi-family and prefab developments to Passivhaus-certified buildings, Glasfëns delivers energy efficiency, durability, and design at the highest standard.