Galvanized Metal Roof Vs Aluminum

Galvalume roofing material combines three of the most important metals used in roofing today steel aluminum and zinc.

Galvanized metal roof vs aluminum. Aluminum is a silvery white soft nonmagnetic ductile metal. 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. Galvalume also comes with a 25 year warranty something that cannot be provided with galvanized metal projects. Exposure testing however has proven that galvalume is up to three times more effective in preventing rust than galvanized steel material.

Galvanized steel has a porous and rough surface which is difficult to clean. 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. You might also notice a slight patina common to ageing aluminum. 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.

Many factors will weigh in on the total cost to install your new roof. Aluminum is a metal whereas galvanized steel is obtained by a hot dipping process in which carbon steel is dipped into zinc. Corrosion has continued to spread outward from its starting point. Aluminum is primarily used for architectural roofing.

Steel can be used for structural roofing and architectural roofing. Architectural roofing does not require structural integrity in the construction assembly. 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. Aluminum is also lighter than steel if weight is a critical factor in determining the roofing material for your project.

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. Galvanized and galvalume steel 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. 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.

In reality when you hear reference of a tin roof in modern times this is normally referring to either a galvanized steel or aluminum material.