Roof Chimney Flashing Details

Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing.

Roof chimney flashing details.

Chimney flashing flat roof copper base flashing is attached to the roof deck before installation of the roofing. Press the flashing into the urethane to achieve a positive seal. The minimum depth of the reglet should be 1 in but 1 in. In addition to the saddle you ll need the following sheet metal parts see figure a.

Mc14a chimney flashing step type. Mc14 chimney flashing pan type. Mc12a pan flashing roof to sidewall 2. In any case the roof deck.

Mc12b metal flashing options. Bottom before the base. You ll need one for. Chimneys have a foundation which may be independent from the house.

Chimney flashing kits are normally composed by 3 parts. Prebent step flashing 8 x 8 in. This section of the primary flashing extends across the face of the chimney to divert runoff around the chimney. Copper cap flashing then covers the upper edge.

The front and back are custom fabricated to order for an exact fit. Some lumberyards stock a dormer flashing. On a chimney flashing. Counterflashing will cover the tops of the step flashing.

Flashing is installed to surround roof features such as vents chimneys and skylights. One common method is to lay the edge metal under the eaves membrane and over the rake. Mc15 chimney cricket flashing pan type. Here is a specific side view of the primary flashing head flashing detail with a shingle roof covering the base of the head flashing.

Details roofing wrb flashing. The base of the counterflashing should include a hemmed drip edge to manage the water figure 12. As you roof along a chimney alternate shingles and l shaped pieces of step flashing. Order about 12 in.

Mc15a chimney cricket flashing step type. It extends at least 8 up the wall and at least 4 onto the roof on all sides of the chimney. Aluminum generally is not used since it is not compatible with masonry mortar. More than the width of the chimney.

The flashing should extend away from the chimney past the base or step flashing before taking a sharp bend downward to create a capillary break an air space that will not allow capillary suction of water from below. Mc16 skylight underlayment detail. For extra protection run a bead of urethane between the step flashing and the chimney. Kits made from copper lead coated copper freedom gray and tcsii are always soldered while aluminum parts are riveted and can be sealed before installation.

Masonry chimneys allowing for movement. Two ways to flash roof edges.