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Leaving a significant amount of snow on your roof can be risky. Most roofs are designed to handle about 20 pounds per square foot of snow, but exceeding this limit can lead to a roof collapse. A collapse can cause severe damage to your home and belongings and poses a physical danger to anyone inside. Furthermore, heavy snow accumulation increases the risk of ice dams, which can cause leaks and water damage to your roof, attic, and interior walls.

When starting the engine, you typically leave the choke on a snowblower in the "choke" or "closed" position. After starting, let the engine run for a few minutes to warm up. Then, gradually open the choke, moving it to the "open" or "run" position, allowing more air into the engine and transitioning to a normal fuel-air mixture. The exact duration varies based on the snowblower model and ambient temperature, but as a general rule, you should open the choke once the engine has stabilized and runs smoothly, typically within a few minutes.

Some commercial services use sand when clearing ice, but that’s to add instant traction, not to melt the ice. While you can scatter kitty litter, sand, or similar substances on steps, paths, or porches to improve safety during icy conditions, they won’t help melt hardened ice. Rely on salt or other de-icing methods to fully melt away stubborn ice.

While removing every snowflake from your roof is unnecessary, you should remove a significant buildup of snow. Since snow is wet and heavy, it can easily cause damage to your roof, which can lead to needing costly repairs. 

Additionally, when the snow melts but has nowhere to go and refreezes, it can create an ice dam, causing mold concerns due to water leaking into your attic and ceiling. For these reasons, it’s best to hire a snow removal professional to clear heavy snowfall from your roof as soon as possible.