Not only could the additional human weight cause the roof to collapse but the slippery and unstable roof could be very dangerous.
Rain on snow covered roof.
A 12 inch snow depth can weight from 10 lbs to 20 lbs a square foot.
Snowy rooftops pose risks ahead of heavy rain warming weather the snow will melt slide down and freeze when it gets to a lower spot.
The increase in weight can get dramatic.
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Snow followed by rain is one of the worst combinations for roofs.
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Leaving the snow to soak up all that rain could mean weighty trouble for your roof.
Snow and rain when snow piles on your roof that layer acts as an insulator which means the membrane is stuck between two layers of insulation.
This last storm probably added.
It is not advisable for a person to climb onto a snow or ice covered roof to remove accumulations.
Rain sleet and ice add to the weight of existing snow.
Even if the roof leak is caused by a windstorm or a tree.
Plus the weight of snow varies depending upon the temperature and moisture content.
It gets trapped in the snow.
1 the building or structure first sustains damage by a covered cause of loss to its roof or walls through which the rain snow sleet ice sand or dust enters.
The problem with rain or wet snow following a deep snowstorm is that the rainwater doesn t pour off of the roof.
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Or 2 the loss or damage is caused by or results from thawing of snow sleet or ice on the building or structure.
That s what causes the icicles and you can actually see the.
As a result as the heat from inside the building goes through it will be warmer than the exterior air and warmer than the melting point of ice or snow.
It s the rain on top of this that is the real problem.
A standard homeowners insurance policy will cover water damage and roof leaks unless they re the result of gross negligence on your part.
At greater risk are roofs that are flat or have only a low pitch.
Laconia the fire department is warning residents that there is a possibility some homes could be damaged later this week when rain weighs down snow covered roofs.
A standard homeowner s insurance policy will cover water damage from rain as long as the storm had opened up a hole in the roof causing the water to leak in.