Types of Roof Flashing

Posted on: May 11th, 2014 by cinc1234

Copper flashing is one of the most durable of roof flashing materials. Copper is one of the best metal materials to use for exterior flashing because it is durable and malleable. Aluminum flashing is one of the most common types of flashing. The type of metal used for flashing depends on where you live. Materials used for flashing can include composite materials, plastic and large sheets of metal, with benefits for each type varying. Flashing is usually made of sheets of aluminum or steel.

metal roof flashingThe proper installation of flashing at the point where the roof meets wall is to use metal step flashing. Depending on the slope of the roof, each step will jump up one or two mortar joints and should lap over the previous piece of flashing at least 4 in. An apron flashing is the first piece of flashing installed along the bottom side of the chimney. All step flashing is installed where the roof meets the wall so the instructions below assume that you are installing step flashing somewhere along the roof to wall connection. Most roof leaks can occur where water is channelled off the roof or where the roof abuts a vertical wall or chimney. The vertical end of the flashing is mostly just tucked under the capped or siding secondary counter flashing, caulked along the skylight or mortared right into a chimney.

The underlayment should be installed on top of the drip edge at the downhill side of the roof. One side of the flashing fits along the vertical wall and the other side fits flat along the roof plane. A specially designed masonry block having a slot or opening into which the top edge of the roof flashing can be inserted and anchored. Fasteners must be driven horizontally through the skirting of the flashing which extends down each side of the parapet wall. A trim characterized as the lowest part of the roof, lining the attached gutter edge. Galvanized nails hold the Z-flashing in place and should be inserted only in the top fold of the flashing, as close to the top edge as possible.

The purpose of the fascia board is to prevent water and wind from damaging the interior of the house and the roof. To direct water away from the home, the flashing must be high enough and wide enough to guide water out of vulnerable areas. Without properly placed roof flashing, water can seep through the roof and cause major water damage to your home. The roof of your home is exposed to the elements more than any other area. Internal roof flashing is used underneath your roofing material to prevent water from leaking into your roof or home. The expansion joint allows the roof to expand without physical damage to the roof or the building.

A quick but fairly long-term fix is to simply slip new flashing under the old rusted stuff. The upstand is finished by the application of suitable flashing. Good application is crucial to the long-term success of a roof. Proper flashing is going to be incredibly important over the life of the roof. Check out Cincinnati Roofing Contractors for more information about repair or new installation.

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