Looking for slim and architectural design windows and doors? Look no further. Our GL Architectural Series has sleek and elegant slim frame, yet strong enough to hold large size windows and doors to bring maximising surrounding views. The material thickness reinforced to meet semi-commercial standard, the high performance thermally broken technology added into the series and carefully engineered and crafted to create a combination of style of high performance. The series has been tested to show astonishing ultimate strength of 3300PA, and meet N5 highest wind load requirement.