"Or have half in steel plate on trackrollers to seal the second floor from first"

"Panic room doors are usually only 1/4" thick with half inch thick supports around the door. A 1/4 inch will do ya pretty fine, unless they have a plasma cutter."

"If you wanted to get into the subject of a Molotov-proof house I would stick to a flame proof house in general: The reason being is the easiest way to defend against a Molotov Cocktail is with active defense (guards). Bullets go much farther than most people could throw any sort of incendiary.

Keeping a perimeter clear is important too. Fortifications rarely ever have trees or cover around them. Withholding cover from your enemy and keeping the high ground is critical."

"True, but flame proof in general also protects you from wildfires, prevents your home from burning should your neighbor experience a house fire, minimizes structural damage should you have a fire of your own INSIDE the house, and so on. Bullets alone can't stop any of those things, no?"

"Yup that is awesome but how would it do against a raider with a crowbar "

"I don't know. I think it depends on how far you're willing to go with it. Once you armor or fortify your home beyond a certain point, the average thief just ain't getting in, even if only because forcing their way in would at the very least require tools or equipment that they are highly unlikely to have at all, much less have with them."