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Friday, October 23, 2020 - What causes ice build up on homes?

If a portion of your roof becomes warm enough to melt some of the snow and ice on top of it, an ice dam can form. That melted snow or ice will trickle down the roof as water, reaching the eaves or gutter and encountering much colder materials where it will freeze again. This process continues until there is a buildup of ice at the very edge of the roof, with liquid water attempting to flow underneath it. The ice can overflow onto your gutters, while the water forces its way under the shingles and possibly through other materials until it freezes and expands. The longer the ice dam continues this process, the thicker it becomes and the more damage it can do.

Other Forms of Ice

Ice sheets and icicles also present dangers during the winter. Icicles form when liquid water gradually drips at the same spot over time, freezing more and more until it grows large enough to potentially break free and fall to the ground. Ice sheets form similarly to ice dams, but instead of melting entirely the heat of the roof only melts a small portion of the ice sitting on it. The remaining ice is able to shift under its own weight due to the thin layer of water underneath it, and in some cases may slide down the roof and fall to the ground.

Removing Ice Build-Up

Care should be taken when trying to remove any form of ice build-up. Don’t use any sharp implement as it can damage your roof, gutters or walls. Instead, tap away at the ice with a blunt mallet or pole. Work in small sections, making sure that there is someone with you to brace your ladder in case the ice shifts. Apply a calcium chloride ice melter to the ice beforehand, if possible, to melt as much of it as you can (but don’t use rock salt or other chemicals that can damage your home.) Take every precaution you can before you start trying to remove the ice, because even when you’re prepared, it can be dangerous.
[ice dam pic]

Preventing Build-Up

To prevent ice build-up, work on improving ventilation in your attic to ensure even heating and consult an energy efficiency expert to see if there are other steps you can take. Use a snow rake to remove snow and ice buildup from the roof before it can become a problem, and clean your gutters thoroughly before winter weather sets in. If you have a continuing problem with build-up, you might also consider replacing some or all of your existing roof with a standing-seam metal roof with a water-repellant membrane underneath it.

Playing It Safe

Removing built-up ice dams and sheet ice can be dangerous. If you’re not careful, you can also damage your roof in the process. Hire a professional if in doubt.

Source Westhawk property management Sep. 2020

posted in home tips at Fri, 23 Oct 2020 21:00:17 +0000

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