Roof Flashing Construction Methods

The edge of the roof has thin metal flashing that helps water drip off.

Roof flashing construction methods.

While some skylight manufacturers include flashing in their products sometimes roofing professionals. Take care not to place any fasteners in the exposed center area of the metal flashing. It s much easier to reseal the flashing than it is to patch a water stained wall or ceiling. Fasten loose nails and cover exposed nail heads with roofing cement.

Proper roof installation is achieved through experience and sound construction techniques thorough inspections and compliance with code requirements standards and manufacturer recommendations. Decks are commonly attached to a house using a ledger board. One of the details that varies between homes is the method of flashing the valley areas of the roof. Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic clip the top corner of shingles along valleys to keep water flow toward center of valley.

Before the availability of sheet products for flashing builders used creative methods to minimize water penetration such as angling roof shingles away from the joint placing chimneys at the ridge building steps into the sides of chimneys to throw off water and covering seams between roofing materials with mortar flaunching. Renew flashing seals by chipping out old caulking and mortar along the edges of the flashing. Closed valleys or open valleys. Details concrete masonry roofing wrb flashing.

Roof to wall and deck to wall flashing www fema gov technical fact sheet no. To understand what makes a valley either closed or open it is important to understand how a valley is constructed. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing. Flashing insures water running down the siding doesn t come into contact with the sill which provides support for your homes framework.

The extra kick at the bottom of the face directs run off away from the structure. Recaulk the joints between the roof and the flashing. There are two common methods for completing the flashing of a valley in a shingle roof system. This drip edge flashing provides protection from water damage along the eaves and rake of a roof.

Open valleys have metal flashing to protect this critical area of the roof. One common method is to lay the edge metal under the eaves membrane and over the rake. To emphasize the importance of proper roof and deck flashing and to provide typical and enhanced flashing techniques for coastal homes. Gibraltar drip edge flashing can be used with asphalt shingles or metal roofing panels.

As the deck interrupts the flow of water from above flashing that channels water around the ledger board is critical.