My Photo
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.

Thursday, January 21, 2010

Ice Dam Potential Damage

The Havoc Ice Dams Wreak by Paul Fisette

Contrary to popular belief, gutters do not cause ice dams. However, gutters do help to concentrate ice and water at the very vulnerable roof eaves area. As gutters fill with ice, they often bend and rip away from the house, bringing fascia, fasteners, and downspouts in tow.

Roof leaks wet attic insulation. In the short term, wet insulation doesn't work well. Over the long term, water-soaked insulation remains compressed, so that even after it dries, the insulation in the ceiling is not as thick. The lower R-values become part of a vicious cycle: heat loss-ice dams-leaks-insulation damage-more heat loss! Cellulose insulation is particularly vulnerable to the hazards of wetting.

Water often leaks down within the wall frame, where it wets wall insulation and causes it to sag, leaving uninsulated voids at the top of the wall. Again, energy dollars disappear, but more importantly, moisture gets trapped within the wall cavity between the exterior plywood sheathing and the interior vapor barrier, causing smelly, rotting wall cavities. Structural framing members can decay. Metal fasteners may corrode. Mold and mildew can form on wall surfaces as a result of elevated humidity levels. Both exterior and interior paint blister and peel. And people with allergies suffer.

Peeling wall paint deserves special attention because its cause may be difficult to recognize. It is unlikely that wall paint will blister or peel when ice dams are visible. Paint peels long after the ice and the roof leak itself have disappeared. Water from the leak infiltrates wall cavities. It dampens building materials and raises the relative humidity within wall frames. The moisture within the wall cavity eventually wets interior wall coverings and exterior claddings as it tries to escape (as either liquid or vapor). As a result, interior and exterior walls shed their skin of paint.


Anonymous Radiant Barrier said...

You mentioned that the fiberglass insulation was wet. You are correct, this type of insulation loses a large majority of its performance when wet. Foil insulation will still perform when wet, this should be added to the insulation package.

February 20, 2010 1:22 AM  

Post a Comment

Links to this post:

Create a Link

<< Home