Design and Measure: Determine the window style and take precise measurements of the opening.

Cut and Assemble Frame: Cut aluminum profiles to size using a miter saw and assemble them using corner brackets or screws, ensuring airtight joints with silicone or gaskets.

Install Glass Panels: Insert glass panels into the frame, using rubber seals or glazing tape for secure fitting.

Install and Seal: Secure the window frame into the opening with screws or brackets, use a level to ensure proper alignment, and apply caulk around the edges for sealing.