1. Ability to resist external strong
wind.
2. Ability to prevent rain from penetrating into building.
3. Nice air seal on whole window system.
4. Maintain constant room temperature.
5. Prevent sound transmission from either inside or outside.
6. Prevent fire from spreading when building in on fire.
7. Prevent break in by strong force.
8. Various types are available.
9. Glass: single, double, clear, tempered, low-e and patterned.
2. Ability to prevent rain from penetrating into building.
3. Nice air seal on whole window system.
4. Maintain constant room temperature.
5. Prevent sound transmission from either inside or outside.
6. Prevent fire from spreading when building in on fire.
7. Prevent break in by strong force.
8. Various types are available.
9. Glass: single, double, clear, tempered, low-e and patterned.
