GR85 Fiberglass Reinforced Polyurethane Casement Doors

The GR85 casement door is built with a high-performance 4-chamber FRPU thermal break profile, delivering unmatched strength and thermal insulation. The premium glazing features double Low-E coatings, argon gas filling, and double-silver technology, achieving an industry-leading U-value as low as 0.8—this translates to maximum energy efficiency and drastically reduced utility bills. Equipped with German ROTO hardware and a full EPDM sealing system, it ensures smooth, whisper-quiet operation and superior airtightness against wind and rain. The eco-friendly waterborne finish resists UV fading and maintains a pristine look for years. For luxury villas, hotels, and passive-house projects, the GR85 means ultimate silent comfort, stable indoor temperatures, and unparalleled energy savings—a door that truly defines premium quality.