Ibc 2015 s table 1506 2 9 2 provides minimum metal thicknesses for open valleys lined with metal for asphalt shingle roof systems.
Sheet metal flashing thickness.
Steel flashing is typically 26 or 28 gauge or about 1 64 in.
Aluminum 0 025 0 032 0 040 0 050 0 063 0 080 1 8 0 125 and 1 4 0 25.
Single pieces less than 2400 mm 8 feet long may be used to connect to factory fabricated inside and outside corners and at ends of runs.
For reglet style counter flashings the wall reglet shall be straight of uniform width ranging between 12 7mm 1 2 and 19 0mm 3 4 wide and not less than 19 0mm 3 4 deep.
For sheet metal products.
Do not store sheet metal flashing and trim materials in contact with other materials.
Furnish sheet metal items in 2400 to 3000 mm 8 to 10 foot lengths.
Where flashing is of metal the metal shall be corrosion resistant with a thickness of not less than 0 019 inch 0 483 mm no.
Stack materials on platforms or pallets covered with suitable weathertight and ventilated covering.
Factory fabricate corner pieces with minimum 300 mm 12 inch legs.
Thickness for metal flashings.
Commonly used metals for manufacturing at our shop are.
However it comes in 10 foot sections with a water control rib.
This is much better suited to be used as roofing valley metal than a flat stock metal.
24 inch 26 guage valley pan flashing can be purchased from you local roofing materials supplier.
Unload store and install sheet metal flashing materials and fabrications in a manner to prevent bending warping twisting and surface damage.
Below you will find a chart for metal thicknesses and weights.
26 galvanized steel an identical statement is made in the international residential code 2015 edition irc 2015 section r903 2 flashing.