This is a major NO-NO. Laying the foil on the grates can restrict the intended air flow inside the grill, which could lead to damage of the internal components, not to mention create a dangerous situation.
Similarly, can you cook with aluminum foil on a gas grill?
Yes! Aluminum foil is a very convenient gas grill accessory. Aluminum foil can be used to cook food on or in. It also serves as a drip pan and heat deflector.
Besides, can you grill hamburgers on aluminum foil? Poke a few holes in the foil along the outer section. Allow the foil to heat for a few minutes. Place your hamburger patties on the foil and grill until done to your liking. The foil keeps the burger fat from flaring up the grill flame and also keeps the burgers cooking in their own juices so you get moist burgers.