How Long Do 50-Year Shingles Really Last in Seattle?

Do 50-year shingles actually last 50 years, or is that just overzealous marketing? Do you want a roof that lasts, but don’t want to overpay for something that underperforms?

At RoofSmart, we walk hundreds of customers per year through the pros and cons of different asphalt shingles to help them find the best fit for their roof. We believe that everyone should have access to honest, clear explanations about what to expect from each type of shingle. 

In this article, we’ll break down how long 50-year shingles really last in the Seattle area, what affects their performance, and how to decide whether they’re the right fit for your home. 

By the end, you’ll have a clear understanding of the trade-offs, what the warranties actually mean, and how to make a confident decision based on your long-term plans.

Want to know if 50-year shingles will fit your roof replacement budget? Get a ballpark estimate of installation costs using our Instant Estimate tool. 

Do 50-year shingles really last 50 years in Seattle weather?

I estimate that 50-year shingles will probably last around 30 to 40 years in the Seattle area. But if you’re super vigilant about maintenance and don’t live near trees, they might last even longer. 

After about 30 years, the shingles will lose most of their granule top layer, which is what protects the shingles from the sun. Once the UV rays start to hit the asphalt, it will speed up the deterioration process. 

Since there is more asphalt than on a 30-year shingle, it will take longer for the 50-year shingles to fully wear out. It probably won’t leak during this time (even if it looks like it will), but it will look worn down and ugly. 

Here’s an example of what a worn-out roof experiencing granule loss looks like:

Technically, nobody knows how long 50-year shingles actually last because they haven’t been around for 50 years yet. Here’s what we do know, though: Seattle weather is tough on shingles, and they usually don’t last as long as they would somewhere else. 

Why don’t shingles last as long in Seattle weather?

Asphalt shingles don’t do well with moisture. Here are all the problems they face due to excessive moisture from the constant Seattle rain:

• Algae: It’s pretty likely that your asphalt shingles will grow algae if you live in the Seattle area (unless they have algae-resistant technology). Not only does algae look bad, but it can also speed up how quickly your asphalt shingles break down.
• Moss: Moss is another common issue on Seattle area homes. Moss growth can actually damage the shingles as it grows, making it easy for water to leak into your roof and cause more expensive damage. 
• Damp debris wears down the roof faster: If you have trees near your roof, then you probably have leaves, pine needles, and other debris falling on the roof constantly. When this debris gets wet from the rain and sits on the asphalt shingles, it can trap the moisture in and cause the shingles to wear down faster. 

• Leaks: If your roof is worn down or the roofers did a poor job of installing it, then your roof is probably going to leak due to the constant rain in this area. This can cause a lot of internal damage to your roof and home before you even notice that it’s happening. Most of the time, we are replacing roofs on homes that had a bad installation job that led to leaks.

Why would I choose 50-year shingles if they don’t last 50 years?

Even if the 50-year shingles don’t last the full 50 years, they’ll still last longer than a typical 30-year shingle. Usually, those last about 17 years in the Seattle area. 

So, you’re paying more for a sturdier, more durable shingle that will last longer than a standard 30-year shingle. 

The big advantage to having a thicker shingle is that it's got a deeper bed of asphalt to embed those granules into. As water and sun do their thing on these shingles over time, the asphalt around the granules is going to wear away. 

However, this process will take longer because the shingles are thicker and they are embedded further in than they would be on a 30-year shingle. 

What does a lifetime warranty mean for a 50-year shingle?

Every shingle these days has a lifetime warranty, no matter how long it’s going to last. With a 50-year shingle, this means that your warranty will last for the lifetime of the shingle, but you might not be eligible for coverage that entire time. 

Typical lower-level warranties have a coverage period of 10 to 15 years. This means that you have 10 to 15 years to get coverage for any manufacturing defects that arise. With a higher level warranty, you’ll get coverage for longer periods. 

The key issue, though, is knowing what is and isn’t covered under the warranty, no matter how long it lasts. In this case, granule loss after 10+ years isn’t a defect; it’s just normal wear and tear. That does NOT qualify for coverage under the warranty. 

It’s actually pretty difficult to get warranty coverage for your shingles. Manufacturing defects are rare, and the manufacturer has final say over what is and isn’t covered. 

How do I know if a 50-year shingle is right for me? 

If you’ve made it this far in the article, you’re probably wondering if a 50-year shingle is the right choice for your roof. You want a more durable, longer-lasting option than the 30-year shingle, but you’re not sure if it’s worth the investment. 

To help you make your decision, check out these scenarios when the 50-year shingle is a good fit. See if any of these apply to your situation: 

• You want a longer-lasting shingle, but don’t have the budget for premium products like Euroshield or metal
• Your HOA requires it
• You’re planning to move in 10-15 years (and you want the roof to last for you AND the new owners)

Should You Choose a 30-Year or 50-Year Shingle for Your Seattle Roof?

Now that you understand how long 50-year shingles actually last in Seattle’s rainy, moss-prone climate, you’re probably asking yourself: Is the upgrade really worth it, or would a 30-year shingle do the job just fine?

The truth is, both options come with trade-offs depending on your budget, how long you plan to stay in your home, and how much maintenance you’re willing to take on. And while a 50-year shingle offers added durability, it may not always be the most cost-effective choice.

Read our article “30-Year vs. 50-Year Shingles: What’s the Real Difference?” to get a side-by-side comparison of the two, so you can confidently choose the one that fits your needs, roof, and long-term plans.