We live in a three-year-old home in Fargo, ND. We have four bathroom exhaust fans that vent through our roof. Each of them, to some degree, "chatter" and clatter when the wind blows. Even more of a problem is that snow blows in during periods of heavy snow/wind, eventually blocking the duct and/or fan itself. This does not appear to be condensation building up on an inadequately insulated duct. The ducts appear to be properly insulated and installed. When I remove the interior fan cover, one can readily see snow packed in around the fan which ultimately melts and drips down in the bathrooms and damages the ceiling sheetrock. Is my theory of snow infiltration rationale? Does anyone have a recommended solution? Can one purchase some sort of roof vent cover that provides some resistance to opening so it isn't so easily and improperly opened by wind?
RedRiver
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