Roof Chimney Flashing Details

In addition to the saddle you ll need the following sheet metal parts see figure a.

Roof chimney flashing details.

Two ways to flash roof edges. Mc12b metal flashing options. Mc14a chimney flashing step type. Mc15a chimney cricket flashing step type.

Roof flashing is a thin material usually galvanized steel that professional roofers use to direct water away from critical areas of the roof wherever the roof plane meets a vertical surface like a wall or a dormer. Bottom before the base. Flashing is installed to surround roof features such as vents chimneys and skylights. Order about 12 in.

Mc14 chimney flashing pan type. One common method is to lay the edge metal under the eaves membrane and over the rake. Prebent step flashing 8 x 8 in. For extra protection run a bead of urethane between the step flashing and the chimney.

This section of the primary flashing extends across the face of the chimney to divert runoff around the chimney. Press the flashing into the urethane to achieve a positive seal. In any case the roof deck. 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.

The minimum depth of the reglet should be 1 in but 1 in. You ll need one for. Here is a specific side view of the primary flashing head flashing detail with a shingle roof covering the base of the head flashing. The front and back are custom fabricated to order for an exact fit.

Aluminum generally is not used since it is not compatible with masonry mortar. Chimneys have a foundation which may be independent from the house. Masonry chimneys allowing for movement. The base of the counterflashing should include a hemmed drip edge to manage the water figure 12.

It extends at least 8 up the wall and at least 4 onto the roof on all sides of the chimney. Chimney flashing flat roof copper base flashing is attached to the roof deck before installation of the roofing. Mc15 chimney cricket flashing pan type. Mc12a pan flashing roof to sidewall 2.

Chimney flashing kits are normally composed by 3 parts. Mc16 skylight underlayment detail. Copper cap flashing then covers the upper edge. Details roofing wrb flashing.

On a chimney flashing. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing. Roofers call these shingle tins. Counterflashing will cover the tops of the step flashing.

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. More than the width of the chimney.