About two weeks ago, Ezriel Green installed a 12-foot-diameter vinyl “igloo” on his back deck. Purchased for $999 and inspired by a rooftop tent he once saw at a New York bar, it has a door opening and window flaps for air ventilation.
Mr. Green, who is 29 and works from home in Toms River, N.J., is using it as a cold-weather outdoor workspace…
