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Debunked: Metal Roofs Can be Used in Coastal Communities

Metal Sales Coastal Roof
March 9, 2023 at 6:00 a.m.

By Metal Sales. 

It is a common misconception that metal roofs will erode and rust on the coast. Metal roofs will actually perform effectively in most coastal areas. 

Editor’s note: Share this guide to metal roofing on the coast with your customers. 

Demand for metal is through the roof! But if you’re anywhere on the coast, you might have some concerns about metal’s ability to withstand the elements. Whether you want a metal roof or metal siding, it’s normal to ponder if it’s suitable for your area's environment. The coast definitely has its geographical difficulties to navigate, but Metal Sales has an in-depth guide for you to decide if metal is right for you. 

Can metal panels be used on the coast? 

Yes! Metal panels, contrary to popular belief, are an excellent choice for coastal communities. While most metal roofing and siding systems will perform admirably in the harsh environments of these regions, there are some options that will provide better protection, durability and cost savings than others. 

Simply put, if you’re more than 1,500 feet away from the coast or salt water, standard metal roofing will suffice; however, if you’re closer to the coast, special paint options or finishes will be required for the product to withstand the coastal environment. 

Materials and profiles 

When selecting a metal roof panel for a project in a coastal environment, decisions must be made on the type of substrate, paint system and other factors. 

When building in a coastal area, the substrate type, paint system, accessories and design are all very important. 

Concealed fastener profiles are strongly recommended because they reduce the exposure of exposed penetrations, edges and fasteners to the corrosive environment. 

Once a substrate material has been selected, it is critical to ensure that the panel profile allows for good water drainage, as standing water can be harmful, and standing salt water can cause panel failure. 

Roof slopes 

While all roof slopes and shapes may be appropriate in coastal areas, having the roof system designed by a professional engineer to determine which panel profile would work best based on roof slope, roof type, wind speed, eave height and substrate. 

A professional engineer can also assist in determining the proper spacing and material thickness for the framing and substructure of a metal roof. 

Coatings 

The performance of various paint systems in coastal environments can vary greatly. When selecting metal panel coatings, it is critical to consult with manufacturers about performance and warranties. 

Once again, if your building is within 1,500 feet of a body of salt water, a special coastal finish should be specified. 

Weather 

Coastal areas are vulnerable to severe weather. When a hurricane hits an area, all structures can sustain significant damage. 

Metal’s strength provides protection during violent storms. Metal roofing and siding panels can withstand wind gusts of up to 140 mph. 

Standing seam metal roofing panels (which we recommend for coastal areas) have maximum weathertightness, which helps prevent water seeping through and causing leaking and water damage. 

Benefits of a metal roof 

Durability 
A metal roof typically will last as long as the house, with an expected lifespan of 40 to 70 years and, often, a 30- to 50-year manufacturer’s warranty. A traditional asphalt roof typically lasts 10 to 20 years. 

Style 
Metal roofs are available in a wide variety of styles and colors. They can make a bold architectural statement or complement any home. A shingle roof has very limited style options. They typically do not account for pitch, run or water run-off. 

Eco-friendly roofing 
Metal is the most environmentally friendly and sustainable roofing material available. Metal roofs are virtually 100% recyclable and are made with a minimum of 25% recycled material, depending on the specific metal. Traditional asphalt shingles require replacement every 15 to 20 years, which means that nearly 20 billion pounds of old asphalt shingles are sent to U.S. landfills every year, according to the Environmental Protection Agency. 

Resale value 
Homeowners who renovate their home with metal roofing are typically able to recoup an extremely high rate of the roof’s cost, 85.9% according to national averages, with homes in the Eastern states recouping up to 95.5%! Homes with a metal roof see, on average, up to 6% resale value gain over homes roofed with asphalt. 

Learn more about Metal Sales in their MetalCoffeeShop™ Directory or visit metalsales.us.com.  

Original article source: Metal Sales



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