air/vapor barrier systems must be compatible with flashings not only from a material standpoint but...
TRANSCRIPT
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 METALS ADVANTAGES DISADVANTAGES
Stainless Steel Durable, Impervious, Hard Difficult to bend High installation costs Must be preformed at factoryNot easily field-adaptedUsually requires steelworkers for installation
Cold-rolled Copper, Durable, flexible, impervious, Cold-rolled stains surfacesLead-coated Copper easier to form and solder than where water runs off; damaged
stainless; Lead-coated does by excessive flexing; Copper not stain corrodes and leads to gradual
change in surface color
COST: $ 9.00 -$ 10.00 PER SQ. FT
COST: $ 9.00 - $ 10.00 PER SQ. FT
COMPOSITES ADVANTAGES DISADVANTAGES
Copper Laminations Easier to form and join More easily torn than metal, than metals. asphalt degrades in sunlight
and can ooze under extreme heatCOST: $ 7.00 - $ 8.00 PER SQ. FT
COMPOSITES ADVANTAGES DISADVANTAGES
EPDM Not susceptible to UV rays, Requires adhesives to bondCorrosion resistant, Good to substrate and requires double Tear and puncture resistance sided tape to seal laps, More
difficult to work with thanrubberized asphalt, resultingin higher labor costs
Rubberized Flexible at low temperatures Affected by UV raysAsphalt Flashing Excellent tear/puncture Cannot form 45 System resistance; self seals around degree drip edge;
stainless steel drip edge; loses adhesive properties
easy to install below 40 degrees;Rubberized-asphalt componentcan ooze out to the exteriorof the building in warmtemperatures.
PVC Not recommended for masonry (Polyvinyl Chloride) flashing applications
COST: $1.00 - $1.50 PER SQ. FT.
COST: $ 4.00 - $ 5.00 PER SQ. FT (including drip edge)
COST: $ 3.00 - $ 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: $4.00 - $5.00 PER SQ. FT (with drip edge)
$3.00 - $4.00 PER SQ. FT (w/o drip edge)
Flashing LocationsShelf 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 11788
p: 800-645-0616f: 631-234-0683e: [email protected]
www.h-b.comwww.h-b-edu.comwww.h-b.com/greenwww.homes.h-b.com
CHRIS BUPPp: [email protected]