Feb 19, 2015 4:08 PM
Roof collapses are becoming more common as winter continues to strike New Hampshire hard.
With this latest storm, some parts of our region are seeing six inches or more fresh snow. That means more weight on some roofs that are already stressed.
Just two feet of snow on a 1000 sq. ft. roof could, conservatively speaking, equal 10,000 lbs. of weight. That's equivalent to 10 moose, and that's if it's light snow weighing just 5 lbs. per cubic foot. Snow can easily weigh up to four times more - 20 or more pounds per cubic foot depending on its density.
Here's how you can test to see how much the snow on your roof weighs. Use a piece of PVC pipe with a cap, push it down to the base of the snow, then turn it upright and let the captured snow melt.
Each inch of water equals roughly 5.2 pounds per sq. ft. Say you have 8 inches of water in the PVC pipe. That would equals 41 lbs. per sq. ft.
All roofs and how much weight they can withstand are different, but roofers say a good rule of thumb is two feet or more of snow and it needs to come off.
Roofs are designed to have the snow load spread out equally. Sometimes wind causes drifts that can imbalance the load on the roof. That can make it more susceptible to collapse.
4 hours 35 minutes agoRepublican Congressman Frank Guinta and former Democratic Congresswoman Carol Shea-Porter litigated old arguments and fought over new issues as they faced off for the...
7 hours 19 minutes agoThe Nashua community is mourning the loss of Jacob Goulet, who officials believe died after he was swept into a storm drain on Friday....
7 hours 43 minutes agoPolice say they've arrested a man dressed as a tree for blocking traffic in Maine. (More)
11 hours 19 minutes agoPremiums will go up sharply next year under President Barack Obama's health care law, and many consumers will be down to just one insurer....
12 hours 23 minutes agoPublic Works were unable to determine how the cover of a sewer drain became ajar, allowing for a 16-year-old to be swept down the...
13 hours 12 minutes agoRochester Police launched an investigation after a woman found pills inside a vending machine filled with candy and toys for children. (More)