Heavy snow accumulation can pose a threat to your home or business -- both as it builds up and as it melts. The three most important things to do are:

• Watch for snow accumulation on the leeward (downwind) side of a higher-level roof, where blowing snow will collect. For safe removal that won't endanger you or damage your roof, consult a roofing contractor for a referral.

• Remove snow from basement stairwells, window wells and all walls. Melting snow can lead to water damage and moisture intrusion.

• Keep your attic well ventilated to maintain a temperature close to that of the outdoors to minimize the risk of ice dams forming. A warm attic melts snow on the roof, causing water to run down and refreeze at the roof's edge, where it's much cooler. If ice builds up and blocks water from draining, water is forced under the roof covering and into your attic or down the inside walls of your house.