There are two generic types of metal roofing
systems for residential use: concealed fastener
systems and exposed fastener systems. Generally,
exposed fastener systems cost less than
concealed fastener systems. Depending on the
aesthetic look you are tying to achieve, your
trained professional contractor at Roofing by
McCallister can help you choose the system right
for you and your roof design.
Galvanized steel is coated with zinc for
corrosion resistance. Galvalume steel is coated
with a predominantly aluminum alloy, also to
achieve corrosion resistance. Both galvanized
and Galvalume are available in various grades.
The grade is determined by the thickness of the
zinc or aluminum coating applied to both sides
of the steel. G-60 is the recommended minimum
grade of galvanized steel and AZ50 is the
recommended minimum grade of Galvalume if it is
to be painted. AZ55 is recommended for Galvalume
if it is to be mill-finished or have a clear
Other metals being used include aluminum,
copper, zinc, stainless steel and terne.
Aluminum is used for its corrosion resistance
and malleability -- such as its ability to be
formed into detailed wood shake profiles.
Aluminum roofing always has a paint finish or
anodization applied to it for color and extra
durability. Copper, zinc and stainless steel
more commonly are used without additional
Copper is used for its durability and
characteristic patina. Zinc also is used for its
corrosion resistance, malleability and low-gloss
gray look. Stainless steel is used to achieve a
lasting, bright, silver metallic look or to meet
the demands of an exceptionally corrosive
Check out our Thumbtack profile. You may learn new things about us. We will bid on your job. And if you find us to be the best supplier of your needs, you can contact us to go over your construction plans, narrow down all the details, have us come out with a full estimate, and have your work done to success!