How Much Does Snow Weight On Roof

Two feet of old snow and two feet of new snow could weigh as much as 60 lbs.

How much does snow weight on roof.

Please remember that the numbers given by this calculator are just an approximation and are by no means 100 accurate. Evaluate your risk of roof top snow ice accumulation snow usually melts off of steep sloped roofs slopes greater than 3 inches of slope in 12 inches of horizontal distance more quickly than flatter roofs. Snow loading is the downward force exerted on structures by the weight of accumulated snow. A roof in an older building may be underbuilt and therefore more vulnerable to structural problems.

Snow which is just frozen ice crystals varies in weight by its volume and density. 1 foot of snow on the roof 8 000 lbs 4 tons 7 psf 2 feet of snow on the roof 16 000 lbs 8 tons 14 psf 3 feet of snow on the roof 24 000 lbs 12 tons 21 psf. Wet snow can be nearly three times heavier than dry. Unsurprisingly wet snow is the heavy stuff.

How much does snow weigh. 28 40 light fluffy snow. There is a calculation for this too. The weight of the snow.

All numbers are approximate. Calculate the weight of the snow on your roof. If it snows 5 of wet snow it will weigh about 12 5 pounds. Per square foot of roof space so anything more than 2 feet of snow could be too much for your roof to handle.

Before the snow starts to fall and build up on the roof of your house take the time to know how much snow your roof can support. Calculating snow load on roof. 3 5 inches of old snow is equal to one inch of water or about 5 lbs. Here are a few examples of the weight of snow on a roof.

How much snow a roof can hold depends on the type of snow roofline and material among other considerations. For any rafter the portion of the roof deck that transfers this load is the tributary area. Calculating the weight of snow is useful when you need to know the total weight it adds for example to calculate the weight on a roof. Ten inches of fresh snow equates to about five pounds per square foot which means your roof likely can support four feet of fresh snow.

The roof deck collects the snow load and transfers the weight to the rafters. Fresh light and fluffy snow will weight much less than the dense packed or wet variety. Psf pounds per square foot. Our snow load calculator helps you to make the decision when to remove the snow from your roof by comparing the weight of snow with the load carrying capacity of the roof.

How much does snow weigh on a roof. Calculating snow load on your roof depends on two factors.