

Looking for the best window replacement in the San Francisco Bay Area? Custom Exteriors is a certified Infinity from Marvin dealer, trusted by homeowners across the East Bay and beyond. Infinity windows are crafted from Ultrex® fiberglass, offering unmatched durability, timeless design, and superior energy efficiency. These windows are ideal for Bay Area climates with cool coastal air and warm inland sun. Discover why Infinity from Marvin selected Custom Exteriors as their exclusive Bay Area partner for professional installation, expert design guidance, and lasting performance.
Infinity from Marvin® gives Bay Area homeowners a complete selection of premium fiberglass window styles designed to enhance natural light, boost energy efficiency, and elevate curb appeal. Each window is built with Ultrex® fiberglass — a proprietary material that’s up to eight times stronger than vinyl — ensuring long-term performance in the East Bay’s coastal, sunny, and variable climate. From modern picture and casement windows that open up your view to timeless double-hung and bay windows that suit classic California ranch-style homes, every design is engineered for strength, beauty, and lasting value.


At Custom Exteriors, we help Bay Area homeowners choose the best window material for their home’s style, performance goals, and budget. Whether you’re comparing fiberglass, vinyl, or natural wood windows, our experts explain how each material impacts energy efficiency, maintenance, durability, and overall curb appeal. From modern fiberglass frames that resist warping and weathering to classic wood windows that bring warmth and character, we simplify the window replacement process so you can make a confident, informed choice that enhances your home’s comfort and long-term value.

Infinity from Marvin windows are unrivaled in the industry, offering an exceptional combination of strength, performance, and design flexibility. Crafted from Ultrex® fiberglass, these windows are eight times stronger than vinyl, ensuring a lifetime of performance and structural stability. For as long as you own your home, they will resist leaks, seal failures, and stress cracks, which are common issues that can negatively affect energy efficiency.
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Infinity from Marvin windows are designed to withstand the test of time. Their strength allows for narrow profiles, providing expanded views and inviting more daylight into your home. The proprietary acrylic finish is fade-resistant and virtually maintenance-free, contributing to a timeless aesthetic that effortlessly complements any home.
Of course, you’ll also have a virtually unlimited combination of customization options to choose from to create the perfect look. Select from a wide array of window styles, frame colors, decorative accents, and more.

Choosing Custom Exteriors for your window replacement project ensures an effortless and satisfying experience. Our expert team, comprised of AAMA Certified Master Installers, is committed to providing you with world-class customer service. From your initial consultation to the final installation, we guide you at every step, ensuring a seamless transition to your new windows.
At Custom Exteriors, we stand behind the quality of our work and the products we install. With over 28 years of experience and more than 28,000 successful projects under our belt, we are the preferred choice for homeowners across the San Francisco Bay Area.
Embrace the transformative power of Infinity from Marvin windows with Custom Exteriors. Contact us today to get started on your project.




