All entry doors including those from basement or garage entrances should be solid core wood that is at least 1-3/4″ thick, or metal.
Doors should fit tightly, with 1/S” maximum clearance.
Doors with glass panels should have a break resistant plastic panel or a metal grill.
Sliding doors require a special lock or wooden strip in the track to block the door from opening. Do not install any door hinges on the outside where they can be easily unscrewed. Use dead-bolt door locks with a strike plate attached by 3″ screws. A rim-mounted lock, attached to the door with long screws, when combined with a dead-bolt provides good protection. Reinforced locks should be used on all doors.