Galvanized Metal Roof Vs Aluminum

Aluminum is a metal whereas galvanized steel is obtained by a hot dipping process in which carbon steel is dipped into zinc.

Galvanized metal roof vs aluminum.

Manufacturers begin with a carbon steel base sheet that is then continuously hot dipped with aluminum and zinc alloys until it reaches a coating consisting of 55 aluminum 43 4 zinc and 1 6 silicone. Galvanized steel has a porous and rough surface which is difficult to clean. You might also notice a slight patina common to ageing aluminum. Galvalume also comes with a 25 year warranty something that cannot be provided with galvanized metal projects.

Today s metal roofs are a far cry from the corrugated tin barns of the bucolic past indeed now you can choose from tin zinc aluminum copper or galvanized steel in a dizzying array of. Architectural roofing does not require structural integrity in the construction assembly. The zinc and aluminum mixture rather than just zinc as galvanized steel uses protects the metal panels against rusting and corrosion better in certain environments when compared to galvanized making galvalume metal last much longer than galvanized steel. For its diy use in the 19 th century and its ability to remain a part of our vernacular long after it left tin could be fondly considered the willy s jeep of roofing.

Exposure testing however has proven that galvalume is up to three times more effective in preventing rust than galvanized steel material. Galvanized and galvalume steel roofing. Galvalume roofing material combines three of the most important metals used in roofing today steel aluminum and zinc. Aluminum is primarily used for architectural roofing.

Steel can be used for structural roofing and architectural roofing. Corrosion has continued to spread outward from its starting point. Because it is harder than aluminum metal roofing stainless steel roof panels will be more resistant to impact damage from hail and the metal also has less thermal expansion contraction movement than either aluminum or copper roofs. The changes in the galvalume roofing are slow and imperceptible though if you compared a picture of the new roof to its current state the nicks and scratches would be visible.

Aluminum is also lighter than steel if weight is a critical factor in determining the roofing material for your project. Aluminum is a silvery white soft nonmagnetic ductile metal. Both metals can be used for roofing. For example aluminum roof shingles cost about 4 60 per square foot and 10 per square foot installed while galvanized steel roof panels cost 3 35 per square foot and 7 75 per square foot installed.

Metal roof installation costs are about the same price or slightly more than your metal panels or shingles.