What should I pay attention to when ordering aluminum joinery?

If you have criteria for thermal insulation in aluminum joinery, you should specify whether the profile is thermally insulated or uninsulated.
According to your project, you need to specify the appropriate aluminum thickness to us. (50mm, 60mm, 70mm….etc)
You must specify the color of the profile to be used.
You must specify the color of the glass to be used.
You must send a drawing that specifies the opening shapes and dimensions of the joinery.
If a special hardware use is required, you must specify.
If your project has a special technical specification, please send it.