Ice Dam Prevention

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Preventing Ice Dams

It’s that time of year when ice dams can form on a house. Preventing ice dams is important for maintaining the structural integrity of your roof. In order to do this, we need to understand how and why they occur.

Heat in the Attic

There are several ways an attic can heat up in the winter. Most often it is from air leaks in the ceiling and walls. This allows the heat from the inside of the house to escape up into the attic. When that happens the snow at the top of the roof starts to melt and travel down to the edges of the roof where the temperature is much cooler. Then the water refreezes causing an ice dam.

Blocked soffit vents also contribute to poor attic ventilation. Sometimes this was done deliberately in attempt to heat up the attic. This definitely will cause ice dams and should never be done.

Temperature Fluctuations

The temperature during winter time can fluctuate. This causes the snow to melt and then refreezes. During the day the temperature rises and then at night the temperature falls again. When this happens, the water can seep under the roof and when it refreezes can cause the roof to separate.

The Sun

The radiant heat from the sun can also play a factor in ice dams. Even if the temperature during the day is below freezing, the sun’s radiant heat can cause the snow to melt. There is really no way to predict how much the sun will radiate on any given day.

Ice dams are a problem this time of year. Contact Davis Roofing and Construction for any of your ice dam needs. Remember, please don’t go up on the roof especially if there is a chance of having ice on it. Leave it to the professionals and we are here to help you out.

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