The following is an excerpt from the article “Preventing Roof Collapse on Homes.” For more information please visit disastersafety.org.
Guidance for understanding how much snow is too much for your home’s roof to handle.
EVALUATE YOUR RISK OF ROOF TOP SNOW/ICE ACCUMULATION
- Melting snow tends to more quickly run off of steep sloped roofs with slopes greater than 3 in. of slope in 12 in. 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.