Air/vapor barrier systems must be compatible with flashings not only from a material standpoint but also from an installation method.. An AIA Accredited Course

SHEET METALSADVANTAGESDISADVANTAGES Stainless SteelDurable, Impervious, HardDifficult to bend High installation costs Must be preformed at factory Not easily field-adapted Usually requires steel workers for installation Cold-rolled Copper,Durable, flexible, impervious,Cold-rolled stains surfaces Lead-coated Coppereasier to form and solder thanwhere water runs off; damaged stainless; Lead-coated doesby excessive flexing; Copper not staincorrodes and leads to gradual change in surface color COST: $ $ PER SQ. FT

COMPOSITESADVANTAGESDISADVANTAGES Copper LaminationsEasier to form and joinMore easily torn than metal, than metals.asphalt degrades in sunlight and can ooze under extreme heat COST: $ $ 8.00 PER SQ. FT

COMPOSITESADVANTAGESDISADVANTAGES EPDMNot susceptible to UV rays,Requires adhesives to bond Corrosion resistant, Goodto substrate and requires double Tear and puncture resistance sided tape to seal laps, More difficult to work with than rubberized asphalt, resulting in higher labor costs RubberizedFlexible at low temperaturesAffected by UV rays Asphalt FlashingExcellent tear/punctureCannot form 45 System resistance; self seals arounddegree drip edge; stainless steel drip edge;loses adhesive properties easy to installbelow 40 degrees; Rubberized-asphalt component can ooze out to the exterior of the building in warm temperatures. PVC Not recommended for masonry (Polyvinyl Chloride) flashing applications COST: $ $1.50 PER SQ. FT. COST: $ $ 5.00 PER SQ. FT (including drip edge) COST: $ $ 4.00 PER SQ. FT

*Elvaloy® is a registered trademark of the DuPont Company THERMOPLASTIC ADVANTAGESDISADVANTAGES Elvaloy ® Membrane Flexible at low temperatures.N/A Not susceptible to UV. Self-adhesive, easy to install, seamless preformed corners and end dams available. Extremely tough, with excellent impact and tear/puncture resistance. Highly resistance to oils and will repel most chemicals Compatible with most silicone and urethane sealants. Suitable for thru-wall or surface- mount construction. COST: $ $5.00 PER SQ. FT (with drip edge) $ $4.00 PER SQ. FT (w/o drip edge)

Flashing Locations Shelf Angle Outside Corner Cavity Wall Base Flashing Shelf Angle Close-Up Inside Corner

Flashing Summary  Flashing must work as a system and include all components such as termination bar, drip plates, mortar collection device, etc.  Determine most compatible flashing system with wall design.  Compatibility with sealants and adjacent materials is critical.  User-friendly flashing systems for field personnel are important

HOHMANN AND BARNARD, INC. 30 RASONS CT. HAUPPAUGE, NY p: f: e: CHRIS BUPP p: