We've had about 6 snow storms in 6 weeks, the last three pretty close together. I'm a bit nervous because there is about 2 feet of snow in the back yard so I am wondering about the pressure/stress on the flat roof of my house. Well, almost flat, it is about a 4 inch pitch. The roof is fairly new. We stripped down to the rafters (air) about 6 years ago and put new plywood and roofing membrane down.