• Rainy Day Exteriors

Why we Don’t Recommend Layering Shingles



A new roof for your home in Tacoma, Bremerton, Gig Harbor, and Port Orchard is an investment. So, when it comes time to replace your roof you might be looking for alternatives to help cut cost, and layering shingles is one of the first options that come to mind. Now, we must be honest, this isn’t a good idea. Here are seven reasons why you need to avoid this approach.


Reason #1: Damage is Hard to Detect

By simply adding a second layer over existing shingles, your roofer isn’t able to inspect your roof’s underlayment and decking. That means small leaks, bad flashing, mold, and rotten wood are left undetected. And we all know by now that when those problems go unaddressed, they can lead to some big problems.


Reason #2: Excess Weight

Did you know, for a typical home an extra layer of shingles adds up to about 9,000 pounds of weight? This extra weight puts pressure on the roof decking, which can be risky in harsh weather, especially in the winter.


Reason #3: Reduced Roof Lifespan

But by adding a second layer of shingles will make your roof hotter because the heat gets trapped between the shingle layers. Increased temperatures can lead to premature aging of the shingles.


Reason #4: Compromised Aesthetics

Layering new shingles on top of old ones, which might be curved or damaged, can result in some visible imperfections on your roof. If curb appeal matters to you, adding a second layer might not be the best option for you.


Reason #5: It Might not be Allowed

Municipalities have guidelines that specify how many roof layers are allowed on buildings. While some building codes may allow re-roofing, others may only allow one layer of shingles.

And if you're layering shingles on your home in Tacoma, you will have to have an inspection before getting started. Learn more here.


Reason #6: Warranty

Re-roofing by layering shingles can void the warranty on new shingles. Before any roofing installation, it’s always smart to check with the manufacturer to better understand the requirements and all warranty concerns.


Reason #7: Resale Value

If you plan on selling your home, re-roofing could decrease your home’s value and make it more difficult to sell. So, while re-roofing might not affect the current owner, new owners have to tear off, and dispose of, two layers of shingles later. This will be noted in any inspection, and inspectors will have to inform buyers of the issues that come with a two-layer roof.

A new roof, when installed correctly can last for more than 30 years.


And remember, every roof will need to be replaced eventually. By doing it right the first time, a full replacement will likely save you a lot of stress, time, and money.


If you’re ready to get started, contact us today! We offer free inspections, and a complete workmanship warranty for the life of materials and as long as you own your home.

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