Can your roof handle record-setting snow?

Record-setting snowfall could pose serious risks to homes.

With some parts of the Northeast predicted to get more than half their annual snowfall in just one day, the amount of snow needing to be removed will impact more than just the roads. Record-setting snowfall could pose serious risks to homes.

Up to 30 inches of snow is forecast for parts of Massachusetts, and meteorologists say that that amount could even be surpassed.

"The biggest impact is going to be eastern Massachusetts along the Interstate 95 corridor. Boston down to Providence and over towards even the upper Cape, where are you going to see 24 to 30 inches of snow. If those heavier bands set up just right, you could [have] some reports of over 30 inches come in," Alan Dunham, National Weather Service forecaster, said. 

Along with the snow, there will be strong winds that could lead to blowing and drifting snow, especially onto homes. The heavy snow could create roof damage and drainage concerns.

"Unless the roof structure is damaged or decayed, most residential roofs, regardless of the location of the house, should be able to support 20 pounds per square foot of snow before they become stressed," Disastersafety.org reports. 

You’ll need to know how much weight your roof can support. FEMA also says that many factors go into snow load effects on structures, like wind exposure to your roof, roof slope, roof shape and even the thermal condition of the building.

FEMA says, "The weight of 1 foot of fresh snow ranges from 3 pounds per square foot for light, dry snow to 21 pounds per square foot for wet, heavy snow."

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Packed snow is even heavier. Any new snow on top of old snow could jeopardize a load capacity.

And if at any point the snow were to melt and refreeze into ice, the frozen water would weigh significantly more than the heavy, wet snow.

With the strong winds and snowdrift, there will likely be an uneven rood snow load.

"Unbalanced snow load poses a greater risk to the roof structural system than a uniform snow load. Hence, the danger of drifting and sliding snow is that both create an unbalanced snow load," FEMA found.

But before you head onto your roof with your snow shovel, you should determine whether not it may be necessary. Older homes may not be structurally sound enough to handle the amount of snow forecasted.

And if you determine that your home can handle the weight of all the snow, make sure that your drainage systems are clear for when the snow melts.

"Snow melt may accumulate in low areas on roofs with poorly designed or blocked drainage systems. This condition is referred to as ponding," FEMA writes. "Ponding creates a concentrated load on the roof structural system and a potential hazard."

Make sure you have the FOX Weather app downloaded to stay up-to-date on the storm. 

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