Water Tightness -350 Pa
1. IWIN-S Aluminum Sliding Door/Window features a Step Sill Structure which is a Patented technology by YKK AP.
YKK AP ‘s Patented Step System Structure uses a raised two rail design to ensure superior drainage which ensures a stable Water Tightness of 350Pa.
2. IWIN-S Aluminum Doors and Windows features 90 Degree Corner Joints
IWIN-S Aluminum Doors and Windows features 90 Degree joints with a Sealer Pad, which ensures a stable water tightness of 350 Pa