Do I need to shovel off my roof?
Also asked, how much snow on roof is dangerous?
Most roofs can withstand 20 pounds per square foot of snow. 2. Calculate the weight of the snow on your roof. Ten inches of fresh snow equates to about five pounds per square foot, which means your roof likely can support four feet of fresh snow.
Furthermore, does roof raking prevent ice dams? Using a long-handled roof rake to removing the snow from at least at lower 4 feet of roof edge can help prevent ice dams from forming. It is usually not necessary to remove the entire ice dam, since opening up a channel may be enough to allow additional meltwater to flow off the roof.
In respect to this, is roof raking necessary?
A Never, never use a roof rake or try to shovel snow off a slanted roof. It will do no good, will not cure ice dams, is extremely hazardous and can harm asphalt shingles and, in your case, slate shingles.
Are Icicles a sign of poor insulation?
That means there's heat loss likely due to poor insulation and/or ventilation in the attic. Also keep an eye out for icicles — another sign of heat loss. If your roof is warm enough to melt the snow but it's cold enough outside for snow to refreeze, your roof is losing heat.