Patternfor Ice Dams On A Metal Roof

So the ice dams still build just higher on the roof.

Patternfor ice dams on a metal roof. The snow melts into water and t. Why ice dams are dangerous. If you do not want to install an entire new metal roof you can put metal only where it is really needed to prevent ice dams along the eaves. Ice belt metal panels are typically short 3 4 and wide 2 5 3 and are made of thin gauge aluminum.

In regards to the idea of a hot edge system on a metal roof it can be helpful. An ice dam forms when the roof over the attic gets warm enough to melt the bottom layer of snow. The major issue with ice dams on the roof is that they trap the melting water running down from the top of the roof and thereby cause it the melted water to rise up underneath the roofing shingles and eventually seep through the boards and walls inside our homes. 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.

Ice dams can be frustrating. This is called ice belt metal panels. Improper attic ventilation should also be assessed and taken into account. Metal roofing can help but is not an ice dam panacea.

A metal roof will generally shed snow better but snow running down the roof will still freeze on the unheated overhangs creating an ice dam. If an ice dam does form an ice belt will reduce the penetration of standing water. Heat tape installed at the eaves melts channels for the water to flow through. It s possible the ice can get a grip on the raised metal screws commonly used to attach the metal sheets to the roof deck.

The hot edge systems i am familiar with do not retrofit well onto an existing metal roof. Metal roofs ward off ice dams pretty well to begin with but a steeply pitched metal roof is kryptonite to an ice dam.