Roof Flashing Gauge Thickness

The problem with metal roofing gauge is that there is a wide range of tolerances.

Roof flashing gauge thickness.

Further your step flashing pieces need to be 10 inches 254 mm long and at least 2 inches 50 mm wider than the exposure of the shingle you re using. 26 gauge 24 gauge 20 gauge 18 gauge 16 gauge 14 gauge 1 8 and 1 4. Imo valley flashing should be a minimum 26ga steel. Nrca recom mends metal counterflashings be a minimum 26 gauge galvanized prefinished galvanized or stainless steel.

Manufacturers in the united states use gauge to express the thickness of metal roof panels. 16 mil 016 inches thick 26 gauge. 0 016 of an inch for copper coated stainless steel. Typically 10 by 8 inch 253 mm x 203 mm flashing is chosen.

Manufacturers express the thickness of metal panels as their gauge with 22 gauge being the thickest and 29 gauge the thinnest of traditionally sold metal roof and wall panels. 2 6 maximum lengths of roofing the valleys or pans of roofing have to carry water to the gutters. In all cases cladding is fixed to a support of 1 0mm minimum base metal thickness bmt and minimum yield stress of 550 mpa. 22 gauge is the thickest while 29 gauge is the thinnest.

0 032 of an inch for aluminum or prefinished aluminum. Each gauge represents a nominal decimal range. 0 7 mm 0 8mm and 1 5 mm. And depending on the pitch of your roof a w style valley is recommended.

0 027 or 0 032 for seamless gutters and any other thickness for custom gutters. It would take approximately 62 5 sheets of 16 milstacked on top of each other to make an inch. For example 3 tab shingles usually have a 5 5 8 inch 143 mm exposure. Kynar galvalume steel for metal roofing and gutters.

The 16 mil is approximately 1 5 times thicker than the 10 mil. Or 16 ounces for copper or lead coated copper. Tar monkey november 19 2014 10 52pm 4 we only use 16oz copper but when i do have to work with aluminum product 026 is the minimum gauge. Kynar aluminum for metal roofing.

Metal flashing section of the nrca roofing manual figure 2 16 provides nrca s minimum thickness guidelines for weatherability for counterflashings used in low slope roof systems. It s important for you as a homeowner to know about the gauge thickness of a metal roof so you can select the best one for yourself. For asphalt shingle roof systems nrca recommends valley metal be a minimum of 26 gauge for galvanized prefinished galvanized galvalume or stainless steel.