1,Heat Insulation:Excellent insulation that works well in extreme climatic conditions. 2,Sound proofing:Well-designed efficient

1,Heat Insulation:Excellent insulation that works well in extreme climatic conditions.2,Sound proofing:Well-designed for effective sound proofing up to 30db meeting relevant standard.3,Impact: Aluminum alloys are stronger than UPVC structures.4,Water-tightness:Well-designed rain protection structures.Water-tightness properties meeting relevant national standard.5,Security: Strong structure protects against break-ins.