By Ken Jorgustin – Modern Survival Blog
You might be very surprised to discover how much snow weighs up on your roof, and the stress and potential danger your home or building might be to roof collapse after heavy accumulation…
A cubic foot of snow can weigh about 7 pounds if it’s dry and fluffy, and it could weigh over 20 pounds if it’s wet and compacted!
Two feet of snow over a roof with a footprint of say, 28×40 feet, could weigh 45,000 pounds! That’s more than 22 tons!
Even just one foot of the light fluffy snow will still weigh 3 tons on that same roof!
Flat roofs are especially vulnerable to roof collapse while pitched roofs can also accumulate snow.
In addition to roof integrity, watch out for snow slides off of a roof – just like an avalanche. If you’re in the wrong place at the wrong time, you could be seriously injured if caught underneath an ‘avalanche’ of snow sliding off your roof.
Here are a few examples of the potential weight of snow on a roof: