Do You Need Ice And Water Shield Under Metal Roofing

Get the real story about drip edge placement.

Do you need ice and water shield under metal roofing.

Penetrations such as chimneys skylights solar tubes and vent pipes need to be surrounded with ice and water shield as well. Roofing ice and water shield is a critically component to any new roofing system especially in cold weather climates. Ice dams are formed by the continuous melting and freezing of snow due to heat escaping from the house or from a backup of frozen slush from the rain gutters the melted water flows under the snow and freezes as it reaches the unheated soffit area at the eaves thus. Does the drip edge metal go under the tarpaper ice and water shield or underlayment on the eave.

So this spring i had a metal roof put on. Not all roofing underlayments are the same. The ice and water shield is an amazing roofing product that was first introduced in the 1980s. And the question was to what extent do you need ice and water shield on the roof.

I was wondering if i still need that with a metal roof. These categories are regular and what s known as high temp i never really thought too much about the difference until a customer of mine had a problem with a black substance oozing out between the metal. If you have a roof that you know to be older than 1980 it won t have this great product under the shingles. You re talking about not snow and ice.

As seen in m. Grace ice water shield is a versatile underlayment material that may be used on sloped roofs under mechanically attached roof coverings such as asphalt shingles slate tile cedar and standing seam metal in many climate and assembly conditions see limitations for additional information. If the roof slope is below 3 12 pitch see our previous post on how to determine a roof s pitch the entire roof should be covered but only if the roof is conventionally vented cold roof construction. Ice dams are a serious issue for homeowners and roofing professionals in cold climates or even where occasional snow may fall.

Many local building codes require ice and water shield and national building code states ice and water shield must start at the roofs eave edge and extend 2 ft inside heated wall space of a structure. And they were talking about putting on i guess ice and water shield. Most manufacturers of fully adhered roofing underlayment or ice and water shield offer their product in two major categories. Do you need to put it on the entire roof or and also do you need felt as well in addition to the ice and water shield.

You re talking about ice and water shield.