Galvanized Metal Roof Vs Aluminum
Both metals can be used for roofing.
Galvanized metal roof vs aluminum. Galvanized and galvalume steel roofing. Steel can be used for structural roofing and architectural roofing. 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.
You might also notice a slight patina common to ageing aluminum. Aluminum is primarily used for architectural roofing. Architectural roofing does not require structural integrity in the construction assembly. Galvalume roofing material combines three of the most important metals used in roofing today steel aluminum and zinc.
Aluminum is also lighter than steel if weight is a critical factor in determining the roofing material for your project. Many factors will weigh in on the total cost to install your new roof. Exposure testing however has proven that galvalume is up to three times more effective in preventing rust than galvanized steel material. Metal roof installation costs are about the same price or slightly more than your metal panels or shingles.
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. 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. Galvalume also comes with a 25 year warranty something that cannot be provided with galvanized metal projects. The galvanized steel roofing will start showing its age.
Galvanized steel has a porous and rough surface which is difficult to clean. 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. 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. 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.
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.