Barbecue rock grates sit directly above the burner and hold lava rock or ceramic briquettes. The purpose of rock grates is to keep grease and drippings off the burners and ensure even cooking temperatures across your grill. If your barbecue rock grate is damaged or rusted, it will need to be replaced to ensure barbecue is performing at its best!. Since barbeque rock grates come in many different shapes and sizes it is very important to select the grate that is designed to fit your brand and model of barbecue. BBQing.com by Capital BBQ offers the widest variety of Barbecue Grill Rock Grates in Canada. If you need help finding a part or accessory, just contact our BBQ experts. We're here to help!