300mph winds are pretty severe - I wouldn't rely on anything less than poured concrete with rebar, and you can forget about windows or a normal roof.LoL do they really build such weak houses? I guess houses in my country would withstand 300mp - made of concrete & bricks only with LOT's of steel within the concrete frame (earthquake resistant - mandatory). The funny thing is we don't have Tornados over here.
We build roofs out of poured concrete too with steel running inside them - tiles are for decoration. Actually it is not Tornados that we are worried about over here - we have Earthquakes for this.300mph winds are pretty severe - I wouldn't rely on anything less than poured concrete with rebar, and you can forget about windows or a normal roof.