Unpainted GalvalumeTM Steel
Fact Sheet
A Superior Building Material of equal coating thickness, shows that weathered roofs over three years of age,
Roofing Galvalume is a coated Galvalume has at least twice the service life the overall solar reflectance also exceeded
steel product that has proven its superior versus galvanized. the minimum U.S. EPA requirement of 0.50
performance as a building material in for maintenance reflectivity.
extended field testing in a diverse range Service Life (Years To First Red Rust)
of corrosive environments. Its unique 45 Enhanced Surface Treatment
Projected
combination of durability, edge protection, Surface treatments suited to specific
40
and resistance to corrosion is at least twice manufacturing and application needs.
that of galvanized steel. 35
Galvanize
30
Galvalume For unpainted applications, bare Galvalume
25 Plus™ is available. Galvalume Plus has a
clear, organic resin coating applied to both
Galvalume coating is an alloy composed 20
sides of Galvalume steel sheet, can be roll-
of 55% aluminum and approximately 45% 15 formed without lubricants, and is delivered
zinc by weight. It is applied on both sides to the job site with an oil-free surface. See
of cold-rolled steel sheet using a precise 10
our Fact Sheet on Galvalume Plus for more
continuous hot dip process. The result is 5 information.
a highly corrosion resistant coated steel
that combines the barrier protection and 0
Severe Marine Industrial Rural
Unpainted Galvalume can also be
extended durability of aluminum with the Marine passivated with a chemical treatment.
galvanic protection of zinc. Source: Bethlehem Steel Flat Coupons Exposures of equal With this treatment, Galvalume must be
coating thickness
oiled with either vanishing or slushing oil.
Galvalume also offers exceptional heat
reflectivity properties, resulting in a lower If color is specified, Galvalume steel
Superior Cut Edge Protection
energy load on buildings and improved sheet can be ordered as prepainted coil.
The aluminum and zinc in the coating This option offers an additional layer of
interior comfort.
combine to prevent corrosion at exposed paint protection in a wide assortment of
From an aesthetic perspective, the fine edges. The zinc component of the attractive colors and paint systems. See
spangle and gentle sheen of unpainted Galvalume coating provides galvanic cut our Fact Sheet on Prepainted Galvalume
Galvalume offers a very attractive edge protection, while the aluminum Steel for more information.
appearance. component remains as a continuing barrier
to corrosion.
Applications
Product Characteristics
Heat Reflectivity and Solar Reflectance Galvalume has many proven applications
Proven Superior Corrosion Resistance
(Energy Efficiency) in Commercial, Industrial, Institutional,
Galvalume steel sheet can be expected Agricultural, and Residential Construction.
to provide at least twice the service life Bare, unpainted Galvalume has undergone
of traditional zinc-coatings of similar extensive testing by the Oak Ridge National • Low-slope structural roofing
coating thickness under the same exposure Laboratory (ORNL), to determine its solar • High-slope architectural roofing
conditions. This has been proven by actual reflective performance. Test results have • Cladding and siding
exposure tests using flat coupon samples, qualified Galvalume as an approved roof • Quonset Buildings
conducted over 36 years in the USA and product by the U.S. EPA – ENERGY STAR • Pre-engineered Steel Buildings
15 years in Canada. Program, for both low-slope and high- • Building Accessories
slope applications. • Construction Tubular
The tests covered a variety of environments • Structural Steel Framing
ranging from rural to severe marine. On newly manufactured Galvalume, heat • Appliance Components
The following chart, comparing the reflectivity was rated above the minimum • Automotive Parts
performance of Galvalume and galvanized U.S. EPA requirement of 0.65. For
