Fiberglass Patio Door Replacement Guide

Replacing your patio door is a great way to improve energy efficiency and update the look and design of your home. Our easy-to-use guide walks you through steps to determine if a replacement is necessary and select the right materials for you.

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First things first: Do you need a new patio door?


Moisture issues

If you are seeing moisture gathering between the glass panes this could be a sign that it is time to replace your patio door. While some condensation is normal, an excess of moisture often leads to mold and mildew.

Energy efficiency

Determine if your patio door has a draft. If you are experiencing a draft from a patio door your energy bills will increase and your home will feel less comfortable. Drafts are a good indicator of an incorrectly fitting door and updating your patio door will create a more energy-efficient home.

Not working properly

Older patio doors have a tendency to break down and can become difficult to open or close. When your door doesn’t close properly, it can become a safety concern.

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bi-fold patio door

Full-frame patio door installation

All Infinity from Marvin patio doors are installed with full-frame replacements, which requires taking out the existing frame. One benefit of full-frame replacements is that it offers the possibility of replacing your old patio door with a new style or larger door. Your local Infinity partner will be able to help you decide the best patio door option for your home.

person standing next to sliding patio door

Patio door materials - Ultrex® fiberglass

Patio doors can be built from many different materials: wood, vinyl, and fiberglass. When replacing your patio door it is important to choose the best material for your location. Infinity from Marvin uses Ultrex fiberglass for proven, long-lasting performance.

Our Process

Infinity streamlines your entire fiberglass door replacement project – from start to finish. Learn about our process and what sets Infinity apart.

Expert consultation

A local independent partner will meet with you to will help determine your specific needs – including climate considerations and other factors. They will answer all your questions and provide a detailed, custom project quote based on your specifications.

A perfect fit

A measure technician will review your order, measure your patio door opening, and verify your installation needs. Your fiberglass door will then be built to your exact needs and measurements.

Seamless installation

Installation professionals will remove and dispose of your old patio door and replace it with your custom Infinity fiberglass door.

Built for Life®

From our Limited Lifetime Warranty to our partners' unparalleled customer service, we go above and beyond to ensure your fiberglass patio door provides a lifetime of optimal performance.

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Get your fiberglass patio door questions answered

Remove the confusion of patio door replacement. At Infinity from Marvin, we work with you to find the ideal patio door for your home and answer any questions you may have. Schedule a free consultation to get your project started.

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Still Curious?

Patio Door Replacement FAQ

The best products are made from the best materials and Built for Life®.  Infinity from Marvin’s replacement fiberglass doors are made with Ultrex® fiberglass which provides strength, stability, and durability. It’s not only 8x stronger than vinyl, but it also resists expansion and contraction in any climate.

Infinity from Marvin offers three different fiberglass door styles; sliding, swinging, and folding. Infinity’s Sliding French and Sliding Patio Doors are great space-saving options and provide easy sliding operation. For timeless design and seamless indoor-outdoor living, opt for Infinity's Inswing French Door — ideal if you have space for doors to swing open. Upgrade your patio door with Infinity's Bi-Fold Door with smoothly folding panels that transform your home and expand your views to bring the outdoors in.  

Depending on your specific needs and project, window and door replacement might take anywhere from a few hours to a few days. For more information check out our window installation page.

There is no shortage of door replacement professionals, but we strongly recommend you look into the credentials of any business you choose. There are some important factors to consider when looking for a professional to replace your patio door. Check out our window and door replacement page to learn why using an Infinity partner is the smart way to go.

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Have additional questions? We are ready to answer anything and everything about your specific window replacement needs.

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