This is the astonishing moment the roof of a house is blown off in a gas explosion at a newly built property. https://filedn.eu/lhVNGNsizwl5t7THnzzJ2c8/New%20public/Newsflash-HouseBlown-01.mp4 Footage obtained by Newsflash from the security camera of another house across the street documents how the roof framing of the single-family home is hurled several feet…