Install Prepared Siding Panel

What happens here

Finally, the worker demonstrates the installation of the prepared siding panel. The bottom lip of the cut panel is first hooked into the nailing hem of the siding panel directly below it. Then, the top edge, now equipped with the newly punched locking tabs, is pushed upwards into the receiving groove of the utility trim (or J-channel) installed along the bottom of the window. The tabs snap into place, securely holding the panel without visible fasteners and allowing for necessary thermal expansion and contraction of the vinyl siding.

Goal: Securely install the cut siding panel under the window