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Name: Julie A Carda

After studying dance in Europe, Julie returned to the United States and graduated from Creighton University. With a desire to expand her knowledge of the arts and spirituality, she graduated from St. John’s University in Collegeville with a Masters in Theology and Liturgical Studies. Over the past twenty years, she has taught high school and college courses, and facilitated workshops on the healing arts while occasionally writing for academic periodicals. Her quest to acknowledge world religions and the desire to expose the similarities of love and peaceful living, led her to travel, live, and study with shaman practitioners, herbal healers, Native American medicine women, Buddhist priests and other earth-based spiritual teachers. Through these experiences and experiences with global metaphysical teachings, she learned to honor the eternal Source of love in all people. Besides writing fiction, Julie is co-creating a Space of Love through advocacy for Kin Domains.

Wednesday, January 20, 2010

Ice Dam Cause

Segment One of Home Energy Magazine's Article on ice dams.

A
nyone who has lived in a snowy climate has seen ice dams. Thick bands of ice form along the eaves of homes, causing millions of dollars of structural damage every year. Water-stained ceilings, dislodged roof shingles, sagging gutters, peeling paint, and damaged plaster are familiar results of ice dams.

Ice dams are not the disease, but rather a symptom of a home's energy sickness. The cure is energy conservation: keep heat from leaking into the attic from the house.

Ice dams need three things to form: snow, heat to melt the snow, and cold to refreeze the melted snow into solid ice. As little as 1 or 2 inches of snow accumulation on a roof can cause ice dams to form. Snow on the upper part of the roof melts, runs down the roof under the blanket of snow to the roof's edge, and refreezes into a dam of ice. As more snowmelt runs down the roof, it pools against the ice dam. Eventually, water backs up under the shingles and leaks into the structure.

The reason ice dams form along the roof's edge, usually above the overhang, is straightforward. Heat and warm air leaking from living space below melts the snow, which trickles down to the colder edge of the roof (above the eaves) and refreezes. Every inch of snow that accumulates on the roof insulates the roof deck a little more (about R-1 per inch), keeping more heat from the living space in, which further heats the roof deck. Frigid outdoor temperatures ensure a fast and deep freeze at the eaves. The worst ice dams usually occur when a deep snow is followed by very cold weather.

1 Comments:

OpenID greenhomesamerica said...

Hey Julie,

I love that you're talking about this stuff! Ice dams? Ventilation? Ducts? You don't see many people spreading the word! I'd like to invite you to take a peek at our blog--I think you'll find kindred thoughts. http://greenhomesamerica.wordpress.com/. (And holler if you want more details on "Cash for Caulkers".)

Thanks!
Mike

January 30, 2010 8:23 PM  

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