... Energy 3.20 years' Window experience Aluminium, UPVC Casement Windows specification:1.45 degree connection for outer frame ,aesthetic ... ,highly water resistant.2.High performance windows designed for high-rise buildings.3.EPDM sealing , maximizing ... Insulation 35dBThermal Insulation 2.8W/(M2.K) Item:Aluminum windows & doorsCertificate:ISO:2008,ISO14001 & CE&AS2047-1999,AS4420 ...