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Gutter guards (also called gutter covers, gutter protection or leaf guards) are primarily aimed at preventing damage caused from clogged gutters and reducing the need for regular gutter cleaning. They are a common add-on or included as an option for custom-built homes .
For this edition of the Scrub Hub, we are looking at ice dams: What are they, what causes them, and what problems are they making worse?
An ice belt—a band of metal roofing—installed at the eaves helps prevent the formation of ices dams by placing a low-friction surface where ice dams are likely to form. If an ice dam does form, the ice belt may reduce the penetration of standing water. Metal roofs with adequate roof pitch and minimal valleys are effective at shedding snow. [1]
Many shingle installations benefit from being placed on top of an underlayment material such as asphalt felt paper to prevent leaks even from wind driven rain and snow and ice dams in cold climates. At the ridge the shingles on one side of the roof simply extend past the ridge or there is a ridge cap consisting of boards, copper, or lead sheeting.
Some individual buildings may melt snow and ice with electric heating elements buried in the pavement, or even on a roof to prevent ice dams on the shingles, or to keep massive chunks of snow and dangerous icicles from collapsing on anyone below. Small areas of pavement can be kept ice-free by circulating heated liquids in embedded piping systems.
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The underlayment also sheds any water which penetrates the roof covering from an ordinary leak, a leak from wind-driven rain or snow, wind damage to the roof covering, or ice dams. However, the application of underlays may increase the roof temperature, which is the leading cause of ageing of asphalt shingles. Not installing an underlay may ...
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