Warning signs of snow overload
FEMA P-957 lists these signs of an overstressed roof:[1]
- Sagging ceiling boards or roof members
- Popping, cracking and creaking noises
- Bowing truss chords
- Doors or windows that no longer open or close
- Cracked or split wood, or cracks in walls or masonry
- Severe roof leaks
- Water collecting where it should not on low-slope roofs
FEMA says to evacuate promptly and have a building authority or design professional inspect.[1]
What makes WNY loads spike
FEMA cites unbalanced loads from drifting and sliding snow, rain-on-snow, meltwater refreezing as ice dams at the eaves, and complex roof geometry (parapets, stepped roofs, chimneys and equipment).[1] The NWS says Buffalo winters bring frequent thaws and rain, and the snow belt south of the city gets much more lake-effect snow than the north.[2] New York's code sets ground snow loads by location for design.[3] That's why Boston, Orchard Park, Hamburg, East Aurora and Elma homes and outbuildings deserve extra attention after big storms.
Removing snow safely
- FEMA says removal should be done only by qualified people following safety protocols, and all removal should stop with an evacuation if collapse is a concern.[1]
- From the ground, a roof rake can clear the lower edge, but University of Minnesota Extension notes rakes may damage roofing.[4]
- Keep gutters and downspouts unblocked before the season; FEMA lists this as homeowner-level prevention.[1]
Metal roofs shed snow quickly; see our metal vs. shingles guide for snow guard advice. Find snow and ice dam contractors.