If water from the thawed snow cant run down the roof and into the gutter, it will pool at the edge of the unthawed
snow on the roof.
The dreaded roof ice dams
Keep in mind that a light dusting of frost, ice or
snow on the roof can be very slippery, so if you do have to walk on the roof while you're doing this, please be very careful."
Win the Winter roofing war: how ice, snow and rain impact your roof and what you can do about it
Ice dams form when there is
snow on the roof and the roof's temperature is above freezing, but the outside temperature is below freezing.
Winter home prep: Chilly climates present extraordinary risks, from burst pipes to ice damming
“What they often forget about is the buildup of
snow on the roof,” he explained.
Ice Dams and Heavy Snow Accumulation Damages Roofs Says Roofing NH Contractor Adam Vaillancourt
Snow on the roof could fall onto windscreens and 'blind' drivers.
MOTORISTS WARNED OVER SNOW ON CAR ROOFS
From tomorrow police are stopping cars with
snow on the roof pounds 60 fine and three penalty points.
YOU COULD BE IN TROUBLE; Police warn motorists as we battle: through yet more of the white stuff
The drama happened in the southern city of Katowice, and it is thought the weight of
snow on the roof caused the cave-in.
50 injured in roof collapse
You already know that
snow on the roof of a tent can bring the tent down on top of you.
What we know about snow
I need Ice damming occurs because hot air from living spaces leaks into the roof space and melts the
snow on the roof. The water then refreezes when it reaches the eaves, which tend to be colder than the roof because they hang over the edge.
Ice damming: find and fix this costly energy thief
That came about when heat from inside melted
snow on the roof. When that very cold water encountered the uninsulated roof cave, it refroze in layer after layer.
Get ready for winter
Snow on the portion of the roof that's over the warm house is likely to melt more quickly than
snow on the roof's overhang.
The dreaded roof ice dams
One contributing factor may be a lack of attic insulation: Heat rises to the attic and begins to melt the
snow on the roof, leaving water nowhere to go beyond the ice dam.
Top worry at home; Conditions ripe for ice-dam damage
"Flat roofs may be more at risk, especially if the
snow on the roof is thawing but the drain that would normally carry it off is still frozen."
Impending thaw could create dreaded roof ice dams
The Insurance Institute for Business & Home Safety warns that it is important to understand the risk of roof collapse due to the weight of
snow on the roof. Roof structures that are in good condition can support roughly 20 pounds per square foot.
Safeguard roofs against snow damage
"Rain would be the worst, since the
snow on the roofs would act like a big sponge.''
Take it off the top; Cranes remove snow from Auburn Mall roof