Interlock and Secure Panels

What happens here

Following the first panel, additional under-deck ceiling panels are installed by interlocking them with the previously placed panels. This is achieved by aligning one edge of the new panel with the exposed interlocking edge of the installed panel and pushing it firmly upwards. The panels typically feature a tongue-and-groove or overlapping lip design that creates a tight, continuous, and watertight seal when fully engaged. The installer applies pressure to ensure each panel is snugly fitted and secured across the width of the deck.

Goal: Create a continuous, watertight ceiling surface under the deck