Zinc Roof Flashing Coastal Areas

Despite these flaws steel roofs in general are popular on the coast for their weather resistance and energy efficiency.

Zinc roof flashing coastal areas.

In coastal areas high winds and the hazards that often accompany high winds such as windborne debris and wind driven rain can prove particularly problematic as this is not specifically addressed by the. Since dissimilar metals in contact with each other in the presence of oxygen and moisture will result in the less noble metal being corroded or eaten away the more noble one contact between dissimilar. However the rest of the roof is badly stained. Had zincshield been installed on the entire roof these roofs would have remained stain free.

Most residential wall flashing today is made from light gauge aluminum coil stock because it is low cost easy to bend and holds paint well. Architectural grade shingles rated to withstand wind gusts up 130 mph are your best bet for high wind areas. From severe winds to torrential downpours there are many factors to keep in mind when choosing a building material that offers adequate protection and durability. While coastal homes come with unbeatable views and easy ocean access they also take quite a beating from the elements.

This coastal home has a 5 v galvalume roof. For roof decks underlayment flashing structural performance and materials and testing criteria. Electropotential of various metals. Listed high to low aluminum 1 30 zinc 0 76 chromium 0 60 iron 0 44 nickel 0 22 tin 0 13 lead 0 12 copper 0 34 silver 0 80 platinum 0 86 gold 1 10.

Zinc coated galvanized flashing installed around the chimney dormer released zinc ions which protected these roofs below the chimney dormer from stains. As with most metal roofs galvanized steel roofs can be installed in standing seam panels or v crimp panels. This coastal roofing material is made of alloyed steel with a zinc coating which will protect your roof from rust strong winds and rain. With all that said if we were to rank the roofing materials from best to worst for coastal living it would go like this.

Don t use zinc on protected areas of a roof for example where the zinc is sheltered by overhangs or a corner which will restrict rainfall. Don t use zinc on fascia and soffits in a coastal location stick to the washed roof surfaces and use alternative metals or other materials for fascia and soffits. And zinc a common alloying metal is a potential biocide so you may need to collect and purify runoff water. The 3 tab 60 mph to 70 mph wind uplift rated roof covering shingles will be ripped off and leaks will be inevitable.

V acceptable open link in same page flashings for penetrations are shown in open link in same page figure 3 5 1 8. The zinc coating needs to be reapplied every 20 years or so.