ELI5: Explain Like I'm 5

Roof deck

Okay, so imagine your house is a little castle with walls and a roof on top. Now, the roof itself has different layers to protect your castle from rain, snow, and winds. One of those layers is called the roof deck.

It's like the floor of the roof, but not like the floor you have in your room. The roof deck is made of strong materials like wood, metal, or concrete that can hold up the weight of the roof and any objects that might sit on it (like a satellite dish or solar panels).

The roof deck is important because it serves as the base for other layers of the roof. Without a solid roof deck, your castle might end up with leaks, cracks, or even collapse during a storm. So, whenever your roof needs repairs or replacement, the roof deck is one of the first things people check to make sure everything is in place.

Remember that a roof deck is not a place to play or sit on, so always stay away from it for your own safety.