Copper Flashings - A Manual - 1925 - Page 40
(§ 74 continued)
(-3.) Where shown on the plans furnish and install 4-pound lead goosenecks of a length necessary for the sheet-metal contractor to make a proper connection to the outlet-box or roof drain, and with a brass ferrule or caulking ring for connecting to the drain pipe.
75. Expansion Joints. (-1.) Roofs. Where an expansion joint in the roof slab is shown on the drawings, this shall be flashed with a strip of 16-ounce copper bent around a piece of No. 14 band iron about 6 inches wide heavily coated with asphaltum. The flashing shall be set while the waterproofing is being laid and shall be built into it. When the roof covering is placed all the space around the flashing shall be filled with mastic or other waterproofing-compound. The contractor may submit for approval other methods of flashing expansion joints.
(-2.) Gutters. Where called for on the drawings provide sliding expansion joints, the full height of the gutters. The lining of the gutters shall be turned up and folded back to form flanges over which a cap shall be placed to form a water-tight joint. There shall be sufficient play between the cap and the flanges to allow for the full movement of the gutter and the building. The cap shall have soldered on its outer edge a V-shaped curb to turn water from the roof into the gutter.
76. Flashings for Stone Cornices. All stone cornices, band-courses projecting more than 12 inches, balconies, balustrades, etc., shall be flashed. Flashings shall be secured on the outer edge by reglets. The back edge shall be continuous at least 3 inches above the outer edge and in no case less than 4 inches high. Where stone facing on brick backing is used, cap flashings shall be set in and shall cover the base flashings.
Where stone balustrades occur on top of a cornice, etc., flashings shall be set in reglets under the balusters, or shall be continuous through the balustrade and either turn down over the interior roof base flashings as a cap flashing, or be connected thereto by a loose-locked joint. Dowels for fastening balustrade members together shall penetrate the flashing and shall be covered with a copper cap or thimble soldered to the flashing.
Flashings over 24 inches wide shall have a full-length longitudinal seam secured by cleats, and shall have a standing seam as close to the outside reglet as possible.
77. Flashings for Terra Cotta. Where indicated on the drawings terra cotta shall be flashed to make a water-tight job. The top surfaces of all projections such as the washes of cornices, where the wash is formed of more than one piece, shall be completely flashed, and where so shown on the drawings all single deck projections shall be so flashed.
Flashings shall be secured to the outer edge of terra-cotta projections by forming around a rolled nosing or bull-nose formed in the terra cotta, or by brass screws set with lead sleeves into holes formed in the terra cotta. The screws shall be set through washers and shall be soldered to the sheet. The sheet so secured shall extend down below the edge of the terra cotta not more than ⅜ of an inch to form a drip.
Cornices, band cornices, gutters, etc., formed in terra cotta, or masonry faced with terra cotta, shall have a continuous flashing running from the outside edge up to and behind the cap flashings.
Cap flashings shall be built in behind the terra-cotta facing above all cornices, etc. They shall extend up the wall at least one course of terra cotta and shall lap the cornice flashing 4 inches. Where the design does not permit a 4-inch lap of base and cap flashings the lap shall be soldered.
Balconies with balustrades shall have continuous flashings running from under the door or window sills through the balustrades and to the outside edge of the projection. Flashings shall be formed with flat-locked or lapped seams well-soldered.
All flashings over 24 inches wide shall have a full-length longitudinal flat or double-locked seam secured by cleats.
Around column bases, etc., flashings shall be turned up and into a reglet formed in the terra cotta, or into the first joint of the terra-cotta facing in such a manner as to make a water-stop.
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