TILT & TURN CASEMENT WINDOW Apartment 1 - 612mm x 1220mm - 0.747 SQM Apartment 2 - 612mm x 1220mm - 0.747 SQM Windows builds to UK specifications: Frames: Aluminum thermal break profile in grey. The interior and exterior wood door is of solid core composite wood material in paint finish Hardware: China brand hardware Glazing: Triple tempered impact and insulated glazing 5mm+0.76pvb+5mm+12A+5mm in LowE, this is for hurricane regions. Screen: Without screen Sealing Materials: High-quality USA brand silicon Thermal Performance ISO standards for thermal performance specify methods for calculating and measuring heat loss (U-values) and solar heat gain.