To install new windows in new construction, start by framing the rough opening and applying flashing to prevent moisture. Fit the new window into the frame, secure it with nails or screws, and seal the edges with flashing tape. Finish by installing the exterior siding or trim to complete the window installation and protect the window from the elements.

Installing new windows in new construction involves creating a rough opening, applying flashing tape for moisture protection, and securing the window in place. The final step is sealing the edges and adding siding or trim to protect the window and complete the installation.