Copper Flashing - 16 oz 24 Gauge 10' Rolls in Various Widths for Roofing, DIY, or Contractor use-Lead Free Copper - can be Used with Pressure Treated Lumber (2" Width)

Product Information

Description: Through-wall flashing is used to divert moisture, which has entered the wall, to the outside, before it can cause damage. This flashing method is considered the most satisfactory method of preventing leaks except in areas exposed to earthquakes.

FOLLOWING ARE EXAMPLES OF SEVERAL POSSIBLE CROSS REFERENCES WHICH MAY BE NECESSARY TO CLARIFY WHAT WORK IS SPECIFIED WHERE. Copper is an excellent material for flashing because of its malleability, strength, and high resistance to the caustic effects of mortars and hostile environments. Flashing, in general, is expensive to replace if it fails. The long life copper flashing offers, is a major asset in this application. General RequirementsIn builders books, by 1832 Loudons An Encyclopædia of Cottage, Farm, and Villa Architecture and Furniture... gives instruction on installing lead flashing and 1875 Notes on Building Construction gives detailed instruction and is well illustrated with methods still used today. [6] Metal flashing materials include lead, aluminium, copper, [1] stainless steel, zinc alloy, other architectural metals or a metal with a coating such as galvanized steel, lead-coated copper, anodized aluminium, terne-coated copper, galvalume (aluminium-zinc alloy coated sheet steel), and metals similar to stone-coated metal roofing. Metal flashing should be provided with expansion joints on long runs to prevent deformation of the metal sheets due to expansion and contraction, and should not stain or be stained by adjacent materials or react chemically with them. Continuous flashing– This is primarily used to provide waterproofing where the roof meets a vertical wall. Sometimes called ‘apron flashing’, it’s a single, long piece of flashing that acts like an apron. It carries water down to the shingles. Expansion joints should be provided for long runs of metal flashing to allow movement without causing deformation. Expansion joints typically use a drive cleat (see Basic Details) set in 2 beads of sealant, 1/4" to 3/8" wide on each side of the joint.

If valley length exceeds 12-feet (3600-mm), increase width of valley flashing by 1-inch (25-mm) on each side per 96 inches (2400-mm) of valley length.

INSERT SPECIFIC LISTING (BELOW) OF SEPARATIONS KNOWN TO BE REQUIRED FOR WORK AS DETAILED. ATTEMPT SHOULD BE MADE IN DETAILING TO AVOID THIS NEED.

Clean exposed metal surfaces of substances that would interfere with normal oxidation and weathering. The minimum recommended weight for copper through-wall flashing is 12 oz. using "High Yield", or 16 oz. using standard cold rolled copper.Step flashing– Sometimes called ‘stepped flashing’, it’s often the preferred alternative to continuous flashing for roof-to-side-wall flashing installations. It describes flashing that overlaps itself.