A. Materials: (See section 8-3-24, appendix A, of this chapter.)
1. Copper: 16 ounce soft (roofing temper).
2. Galvanized Sheet Metal: 26-gauge, 1.25 ounce (total weight both sides) zinc coating per square foot.
3. Lead: Hard lead, 2 pounds. Soft lead, 4 pounds.
4. Tin: 40 pound coating, painted both sides.
5. Aluminum: Of suitable weight.
6. Copper And Zinc: Copper and zinc flashings, gutters, and downspouts not to be used in conjunction with each other.
B. Openings Not Protected By Overhang:
1. Heads of openings, wood frame walls: Sheet metal extended behind finish siding material and turned down over outside edge of head trim, unless drip cap extends behind and above bottom of finished material or 3 ounce copper coated building paper may be used, provided flashing is not exposed to weather more than 2". Extend behind siding. Blind tack at outside edge of drip cap, 1" on center.
2. Heads and sills of openings, masonry veneered wood frame walls: Material: Sheet metal or membrane waterproofing material acceptable to building officer. Head flashing: Extend from front edge of lintel and up and over top of lintel and up on sheathing under building paper. Sill flashing: Extend under masonry sill, up on sheathing and under wood sill.
3. Heads and sills of openings, masonry walls: Material: Sheet metal or membrane waterproofing material acceptable to building officer. Head flashing: Extend from front edge of lintel, up and over top of lintel, through wall and run up 1" on inside surface. Sill flashing: Extend under and behind masonry sill.
4. Heads of openings, stuccoed wood frame walls: Material: Sheet metal. Drip: Form drip on front edge of drip cap and extend flashing up behind building paper underneath stucco.
C. Intersections:
1. Provide sheet metal flashing for all horizontal and vertical intersections of stucco with other materials.
2. All flashing in connection with masonry walls shall have flashing or counter flashing built into masonry not less than 1".
D. Valleys:
1. Rigid shingle roof covering: Flash with sheet metal. Flashing on roof slopes, less than 7 in 12: Width, 18". On roof slopes 7 in 12, or more: Width 12".
2. Asphalt shingle roof covering: Flash with sheet metal; or 2 thicknesses of mineral surfaced roll roofing material, cut from rolls weighing not less than 85 pounds per square. Bottom strip, 18" wide, top strip at least 12" wide. Single strip, 18" wide, may be used under closed valleys.
E. Roof And Wall Intersections:
1. Sloping roof: Sheet metal flashings.
2. Flat roof: Sheet metal or same material as roof covering. When sheet metal is not used, install 45° cant-strip at roof and wall intersection.
F. Terrace Or Porch Slabs:
1. Flashing material: Sheet metal.
2. Extend flashing at finish floors of terrace or porch from 14" outside exterior face of finish, turn up 4" behind exterior finish, then turn down and extend 4" below top of outside of foundation.
G. Chimneys:
1. All chimney and roof intersections, sheet metal flashing.
2. Cricket or saddle covering. Sheet metal. (Ord. 2008-09-01, 9-24-2008)