Renewal by Andersen®’s Warranty Coverage

Replacing your windows is an important investment that you’ll hopefully only need to make once or twice in your lifetime. Fortunately, Renewal by Andersen® provides high-quality replacement windows that are backed with the strongest warranties in the business, guaranteeing long-term performance and total peace of mind for our customers.

Here’s what you need to know about our warranties:

Fibrex® and Glass

Over the years, we’ve developed innovative window materials that will improve your home’s energy efficiency and comfort. One of these is Fibrex®, the material we use for all our window frames. Composed of 40% wood fiber by weight and thermoplastic polymer, this composite material combines the insulating properties of wood with the low-maintenance nature of vinyl. Fibrex resists cracks, chipping, fading, warping and sagging. It’s also twice as strong as vinyl, guaranteeing peak performance for many years.

Our glass packages, which we offer in three tiers, are among the most advanced, energy-efficient products in the business. Our most advanced option, the High-Performance™ Low-E4® SmartSun™ glass, is 70% more energy efficient in summer and 45% more energy efficient in winter than regular glass, and can filter 95% of harmful ultraviolet radiation.

We are confident that these window components will stand the test of time, so we back them with a 20-year limited warranty.


When hiring window contractors for your upcoming project, look for a company that has been serving homes for many years. Our team of installers have gained enough experience to take on any window replacement job, which makes us one of the most trusted names in the industry. We provide a lifetime installation warranty for residents.

Frame, Sash and Locking Mechanism

Even the smallest window component matters, which is why we offer a 10-year limited warranty for the frame, sash and locking mechanism. Our flawless workmanship guarantees that your new windows will work like new for decades.

At Renewal by Andersen, we ensure that our clients get only the best replacement patio doors and windows. We’ll help you customize each unit to get the results you want. Call us today at (206) 775-7533 to learn more about our products and services. We serve residents, and nearby areas.

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