4 Steps To Prevent Roof Collapse On Homes

4 Steps To Prevent Roof Collapse On Homes

It’s important to understand your risk of roof collapse due to the weight of snow on the roof. How much weight can a roof support? How can I prevent snow roof collapse? Should I use a snow roof rake or call a professional for roof snow removal? Get these answers and more to help prevent a roof collapse.

1 – Evaluate Your Risk

Melting snow tends to more quickly run off of steep sloped roofs with slopes greater than 3 inches of slope in 12 inches of horizontal distance, particularly the steeper ones that are typically found on houses in northern climates.
Ice and snow tend to more readily accumulate on low slope and flat roofs over porches, lanais, or parts of a home that are next to a taller section of the house, especially during high winds.

2 – Estimate How Much Weight Your Roof Can Support

Unless the roof structure is damaged or decayed, most residential roofs, regardless of the location of the house, should be able to support 20 lb per square foot of snow before they become stressed.

3 – Estimate How Much the Snow on Your Roof Weighs

Fresh snow: 10–12 inches of new snow is equal to one inch of water, or about 5 lb per square foot of roof space, so you could have up to 4 feet of new snow before the roof will become stressed.
Packed snow: 3–5 inches of old snow is equal to one inch of water, or about 5 lb per square foot of roof space, so anything more than 2 feet of old snow could be too much for your roof to handle.
Total accumulated weight: 2 feet of old snow and 2 feet of new snow could weigh as much as 60 lb per square foot of roof space, which is beyond the typical snow load capacity of most roofs.
Ice: 1 inch of ice equals 1 foot of of fresh snow.


4 – Snow Removal May be Necessary to Avoid Roof Collapse

Most homeowners know it is time to re-roof when water spots appear on their ceiling or they have dripping at the foot of the bed during and after a rainstorm. Unfortunately, many leaks begin long before they start to show. As asphalt shingles curl, lose granules and age, they begin to detach from the roof. When regular wind and rainstorms hit, water can blow up underneath the shingle and find its way to nail holes or through the protective felt paper underneath.

The signals that indicate your roof is overloaded of snow:

– Difficulty to open doors or windows
– Sudden Crunches
– Sagging roof parts
– Cracks in the wood, walls or masonry


If you do not want to have to remove snow every winter, Kasselwood metal roofing System offers unparalleled peace of mind. With our metal roofs, snow evacuates naturally. For more information, visit our web site’s page “10 good reasons to choose a Kasselwood roof “.

For more information about Kasselwood Permanent Metal Roofing System or for a free estimate! Contact Us !