snow fence

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Related to Snowfence: Lowes

snow fence

[′snō ‚fens]
(civil engineering)
An open-slatted board fence usually 4 to 10 feet (1.2 to 3.0 meters) high, placed about 50 feet (15 meters) on the windward side of a railroad track or highway; the fence serves to disrupt the flow of the wind so that the snow is deposited close to the fence on the leeward side, leaving a comparatively clear, protected strip parallel to the fence and slightly farther downwind.

snow guard

snow guards (two types)
Any device intended to prevent snow from sliding off a sloping roof.