Metal Roof vs Asphalt Shingles: Which Is Better for PNW Homes?

When it comes to a roof replacement in the Pacific Northwest, two of the most dominant material choices are metal and asphalt shingles. Both offer robust protection, but they cater to different priorities, budgets, and long-term goals. For homeowners in the rainy, moss-prone climates of the Portland metro and Vancouver metro areas, understanding the specific advantages of each is key to making a wise investment.

This comprehensive guide will break down the comparison between a metal roof and asphalt shingles to help you determine which is truly better for your PNW home.

Durability and Longevity: The 50-Year Question

This is where metal roofing truly shines. A properly installed standing seam metal roof can last 50 to 70 years or even longer. It is exceptionally resistant to the most common PNW roofing issues, including high winds, heavy rain, and rot. The non-porous surface is also highly effective at resisting moss and algae growth, a constant battle for PNW homeowners.

High-quality architectural asphalt shingles, by contrast, have a lifespan of 20 to 30 years. While this is a respectable duration, it is significantly shorter than that of metal. They are more susceptible to granule loss over time and can be more vulnerable to damage from wind-driven rain and falling debris.

Winner: Metal

Upfront Cost and Long-Term Value

Asphalt shingles are the undisputed winner in terms of upfront cost. Both the material and the installation are significantly less expensive than metal roofing, making it a more accessible option for many homeowners. This lower initial investment is a primary reason for its widespread popularity.

However, the long-term value proposition of metal is compelling. While the initial cost is higher, a metal roof could last two to three times as long as an asphalt shingle roof. This means you may have to replace an asphalt roof two or even three times in the same lifespan as a single metal roof. When you factor in the long-term replacement costs, a metal roof can be the more economical choice over the life of your home.

Winner: Asphalt (Upfront Cost), Metal (Long-Term Value)

Maintenance in the PNW Climate

Both materials are relatively low-maintenance, but metal has a distinct edge in the damp PNW.



• Metal Roofing: The smooth, non-porous surface of a metal roof is excellent at shedding rain, snow, and debris. It is naturally resistant to moss and algae, which means you won’t have to worry about the growth that plagues so many other roofing types in our region. An annual inspection and cleaning are typically all that is required.
• Asphalt Shingles: While many modern asphalt shingles come with algae-resistant granules, they are still more prone to moss growth than metal. Our rainy season roof maintenance checklist is a crucial resource for asphalt shingle homeowners. They require more diligent cleaning and inspection to ensure that moss does not take hold and compromise the integrity of the shingles.

Winner: Metal

Aesthetic and Style Options

Historically, asphalt shingles offered more versatility, but modern metal roofing has closed the gap significantly.



• Asphalt Shingles: Available in a vast array of colors and styles, architectural shingles can mimic the look of more expensive materials like slate or cedar shakes. This makes it easy to find an option that perfectly complements your home’s architectural style.
• Metal Roofing: Metal roofing is no longer limited to the industrial look of standing seam panels. It is now available in a variety of colors, finishes, and even shingle-style profiles that can offer a more traditional aesthetic. However, for a truly classic look, asphalt still provides more diverse options.

Winner: Asphalt

Energy Efficiency and Environmental Impact

Both materials have environmental considerations that are worth noting.

• Metal Roofing: Metal roofs are highly reflective, which means they can help reduce cooling costs in the summer by reflecting solar heat away from your home. Many metal roofing products are also made from a high percentage of recycled materials and are themselves fully recyclable at the end of their long lifespan.
• Asphalt Shingles: While asphalt is a petroleum-based product, the roofing industry has made significant strides in recycling old shingles into asphalt for roads and other applications. Many modern shingles also incorporate recycled content.

So, What’s The Right Choice for Your Home? 

The decision between a metal roof and asphalt shingles depends on your priorities and budget.

• Choose a Metal Roof if: Your primary goal is maximum longevity, superior durability, and minimal long-term maintenance. You have a larger upfront budget and plan to stay in your home for a long time to realize the long-term value.
• Choose Asphalt Shingles if: You are looking for a reliable, cost-effective, and aesthetically versatile option. Your budget is more focused on the upfront cost, and you are comfortable with the standard 20-30 year lifespan.

For many PNW homeowners, the combination of affordability and reliable performance makes architectural asphalt shingles the go-to choice. However, for those seeking the ultimate in long-term, worry-free protection, a metal roof is an investment that pays for itself over time.

Ready to get a personalized recommendation for your home?

At RedBird Roofing, we specialize in both metal and asphalt shingle installations. We can provide a detailed estimate for both options and help you make the best decision for your home and budget. Contact us today for a free, no-obligation consultation.

Read More on Our Blog:

• Your Ultimate Guide to Different Types of Roofing Materials
• Understanding Roofing Warranties: A Homeowner’s Guide
• Asphalt Shingles vs Cedar Shakes in the PNW