Metal Roof Chimney Flashing Details

Flashing is installed to surround roof features such as vents chimneys and skylights.

Metal roof chimney flashing details.

A do it yourself video detailing step by step how to flash a chimney with our metal roofing chimney kit. Dealing with dips and making clean overlaps metal drip edge flashing is installed on the perimeter of a roof to direct water away from the fascia into the gutters and to keep wind blown rain. Bend legs up the chimney sides about 1 inch. Order about 12 in.

A metal cap flashing does this see figure 1 8. Trim panels to fit around the chimney. In addition to the saddle you ll need the following sheet metal parts see figure a. The wall side of the flashing can be covered with siding or counter flashing and outside closures are used to seal between the flashing and the panel.

At the gable edge use a gable or sidewall flashing. 1 8 cap flashing exterior walls require a cap to prevent water from penetrating from the top of the wall. The bottom base flashing is made of a single piece of metal extending 3 to 6 inches down over the shingles that already have been installed and 12 inches some say less up the bottom face of the chimney. To provide a drip edge allow an overhang of 1 to 2 inches at the eave.

This flashing wraps a few inches around the sides of the chimney. Roofers call these shingle tins. The trim and roofing sheet should be fastened every 12 to 24 inches along the gable edge. This will keep weather out prevent lifting in high winds and provide a neat finished appearance.

Videos roofing wrb flashing. 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. Some lumberyards stock a dormer flashing. Prebent step flashing 8 x 8 in.

Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley. Drip edge installation on an existing roof. Panels above the chimney should be removed. You ll need one for.

Cut two opposing 45 degree notches into z closure to allow a 90 degree bend.