How the estimate works
Snow weight depends far more on density than depth. This estimator uses rough averages: about 0.5 pounds per square foot (psf) for each inch of fresh, fluffy snow, about 1.5 psf per inch of settled or wet snow and about 4.8 psf per inch of ice. It multiplies the result by the roof’s flat footprint and compares it with the design load you enter.
Why it matters for claims
Collapse and damage from the weight of ice and snow is a named or covered cause in many Pennsylvania homeowner policies, while gradual leaks and wear are usually excluded. If a storm like the February 2010 snowstorms or Erie’s Christmas 2017 lake-effect event damages your roof, photographs of the snow depth, the date and the damage help separate the covered event from old conditions.
Related help
See our ice dam and frozen pipe claim appraisal service and the guide to ice dam and frozen pipe claims.
Questions about this calculator
What design snow load does my roof have?
It depends on where and when the building was built and the code that applied. A builder, engineer or local code office can tell you; this tool only compares against the number you enter.
Should I shovel my own roof?
Roof snow removal is dangerous. Many owners use a roof rake from the ground or hire insured professionals rather than climbing on an icy roof.