Instructions / Assembly

When snow blows and drifts on roadways or driveways, the end result often includes a
reduction in driver safety, degradation of road quality, and significant removal costs for drifted
snow. Snow fences are also used to trap snow in dugouts for water storage. The value of a
snow fence is clear; however, exactly how one works is commonly misunderstood.
Snow fence is designed to CREATE drifts rather than to prevent them. Snow drifts form
wherever the wind slows down, so the basics of drift control are (1) keep a blizzard wind
moving, or (2) slow it down where you want the snowdrift. Snow fences act as windbreaks,
causing blowing snow to be deposited as drifts where it is stored.
Proper installation is critical. Snow fence should be positioned upwind of the desired drift area,
noting the prevailing wind direction. Posts should be strong as they will be the weakest link
where tensile strength is concerned (metal U-posts should not be used). Bury posts 1/3 their
height and place no more than 8 feet apart. The fence should be pulled taught, and support
wires should stabilize end posts to prevent sagging. Fence should be attached to the upwind
side of the post to minimize tearing. There should be a 5" minimum gap at the bottom of the
fence to prevent burying. The higher the fence from the ground, the further away the drift will
start.