Frequently Asked Questions
Are there any problems with the glass inside? Having steam or going foggy?
Usually, we use 5mm+6A+5mm double glass. Our double glass is made professionally, so there is no steam or fogging between the panes.
Do all these doors and windows come with frames to mount on walls?
Yes, all doors and windows include frames. They are designed for easy installation onto walls.
Can I use 6mm single glass instead of 5mm double glass?
It is better to use 5mm double glass because it is safer, more soundproof, and fits the door profile perfectly without requiring excessive silicon filling.
What is the difference between 90-degree and 45-degree connecting?
90-degree windows are connected by screws, while 45-degree windows are assembled by corner braces. The 45-degree corner connection is a newer style that is easier to overhaul.
What type of fly screens can you supply?
We offer three styles: roller style for casement windows, sliding style for sliding doors/windows, and folding style for casement doors. Materials include nylon, steel, and Kingkong net.
PVC and aluminum, which is better?
Both have advantages. PVC is excellent for insulation and is more economical. Aluminum offers superior hardness, durability, and security.
Fortress Windows
