Flashings and copings, Copper in Architecture Design Handbook, Copper Development Association Inc., http://www.copper.org/applications/architecture/arch_dhb/flashings_copings/intro.html

Galvanized steel is much stronger than aluminum. Steel is more popular for projects that need more strength and durability. This strength isn’t ideal for all consumers and tasks as it’s a heavier much denser quality than aluminum. In builders books, by 1832 Loudons An Encyclopædia of Cottage, Farm, and Villa Architecture and Furniture... gives instruction on installing lead flashing and 1875 Notes on Building Construction gives detailed instruction and is well illustrated with methods still used today. [6] Aluminum is more conductive than galvanized steel. In fact, it’s over four times more conductive for transferring heat effectively. In fact, aluminum is one of the best materials for conducting heat, therefore, this makes aluminum popular for transmission lines. PERM-A-BARRIER Aluminum Flashing should not be used in applications such as roofing applications and open joint wall panels where it will be left permanently exposed to UV. Health and Safety Materials used for flashing include copper, galvanized steel, lead, aluminum, stainless steel, bituminous sheet material, and plastics.

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Let’s begin looking at the difference between aluminum and galvanized steel by analyzing the features and uses of both materials. Below, we’ve outlined some of the most popular uses of both. – Aluminum uses Whenever the continuity of a roof covering system is penetrated, flashing is required to prevent water infiltration through the opening. Loudon, J. C.. An encyclopædia of cottage, farm, and villa architecture and furniture; containing numerous designs for dwelling … each design accompanied by analytical and critical remarks .... London: Longman, Rees, Orme, Brown, Green, & Longman, 1833. 126. Print. Gravel stop flashing typically has a raised perimeter lip to contain gravel on a flat roof. The drip edge at the bottom of the face directs water away from the structure. Flashing at Openings

Another popular reason to use aluminum is for its stunning appearance. This material boasts a variety of finishes and colors, including anodizing or coating, that ensures it matches high aesthetic demands. You can use galvanized steel for exterior design purposes, because it possesses a vintage look. Is aluminum better than galvanized steel?Schmid, Karl F. "Flashing". Concise Encyclopedia of Construction Terms and Phrases. New York: Momentum, 2013. Print. Roof flashing is an important finishing touch on any roofing project, to help direct water away from chimneys, vents and roof tiles during rain. Lead flashing roll is easy to apply, with fixings, clips and sealants for an even more reliable water-resistant roof surface. Typical components used in chimney flashing include an underlayment, a metal saddle, step flashing, counter flashings, mortar, and solder to bond the metal workpieces. Masonry Parapets