1:5:10:365 EcoTip Blog

November 13, 2008

:318 Predict Ice Dams

Take the 1:5:10:365 challenge: Do one thing – for 5 to 10 minutes – 365 days a year to make our home and planet environment better.

1:5:10:318 EcoTip: Thermal imaging can be used to predict locations on the roof where ice dams are likely to form. The thermal imaging camera is used to locate hot spots. These represent the areas where snow will melt. If the melted snow has to run down an area of roof where the water will refreeze, then the formation of an ice dam becomes more likely.

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Courtesy of MoistureView.com

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 Additional Information:

Suggested Review: :313, :317

The large blue area in the thermal image above represents a cold area with missing insulation where the attic eave vent is located. The heat from the house will escape upwards warming the underside of the roof. If snow is present the extra warmth may cause it to melt and run down the roof onto the cold overhang. If conditions are right the water will refreeze and form a dam that prevents subsequent water flowing downward from draining off the roof. This water can then migrate into the home. This thermal image can be used to predict that water from any ice dam that forms from this missing insulation is more likely to drain down into the wall cavity causing damage.

Tomorrow’s 1:5:10:365 EcoTip will show how this eave area could be insulated and ventilated at the same time.

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November 12, 2008

:317 Prevent Ice Dams

Filed under: :317 Prevent Ice Dams — Tags: , , , , , , , , , , , , , — John Banta @ 12:50 am

Take the 1:5:10:365 challenge: Do one thing – for 5 to 10 minutes – 365 days a year to make our home and planet environment better.

1:5:10:317 EcoTip: Ice dams occur when roof snow melts over warm areas of a roof then refreezes as it runs down into colder areas. The frozen blockage creates a dam that prevents the water from draining from the roof. The water that becomes trapped can then migrate up under the roof shingles and drain into the house causing water damage. This can be especially expensive when the water drains into the wall cavities and isn’t discovered and dried quickly.

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 Additional Information:

Tomorrow’s 1:5:10:365 EcoTip shows you how to predict areas where ice dams are likely to occur.

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