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The Common Causes of Window Seal Failure

Insulated windows are equipped with sealed double-pane glass. Sometimes, the seals could fail, resulting in reduced energy efficiency. Here’s a look at the causes of window seal failure.

How Do Window Seals Work?

Traditional single-pane glass has always been problematic because the largest component, glass, is highly conductive. It allows precious indoor heat to escape during cold days. It also lets heat seep into the house during warm days. Windows with single-pane glass increase indoor heating and cooling requirements, which result in higher monthly energy costs.

Insulated windows, on the other hand, feature double-pane glass: two glass panes, separated by an insulated spacer, are assembled so there’s a sealed vacuum inside. With no molecules to conduct heat, double-pane glass helps maintain consistent indoor temperatures, reducing the need for the HVAC system to compensate. It has proven to be so effective that all Renewal by Andersen® replacement windows are equipped with double-pane High Performance™ Low-E4® glass packages. 

Common Causes of Window Seal Failure

Even the best window seals can fail due to one or more causes:

  1. Age — Window seal technology has taken leaps and bounds over the years. Newer windows are far less likely to fail due to age. We at Renewal by Andersen are confident of the seals we use on our replacement windows that our limited warranties include a 20-year coverage for the glass packages.

  2. The Elements — Window seals can be jarred loose or damaged by wind and driven rain. Lack of protection from ultraviolet (UV) rays can deteriorate the window seal. Fortunately, it can be repaired. The earlier you notice the damage, the less repair work will be needed.

  3. Mold — Mold growing on the windows can weaken the seal and cause discoloration. A mildly acidic cleaning solution, such as diluted white vinegar, can be an effective way to remove mold. If your windows came with factory-applied coatings, read the care and maintenance manual if vinegar will affect the paint coatings.

  4. Lack of Maintenance — More than a few homeowners confuse “low maintenance” with “no maintenance”. Windows still need to be cleaned and maintained; it’s just easier when you have low-maintenance windows. This means you will need to stick to a regular cleaning and inspection routine as prescribed by your contractor.

Renewal by Andersen of St. Louis is your leading provider of replacement windows and patio doors. Give us a call at (314) 332-2364, or fill out our contact form. We serve customers in Chesterfield, MO, and nearby areas.

Reviews

"This was one of the best experiences I've ever had with a company. I ordered the windows in November and was told they wouldn't be here until July. That kind of delay the new norm so I wasn't a bit upset with the timeline. I was given an early present when they called to say the windows would be in at the beginning of May. We agreed on the week of May 16th to do the installation, there were 30 windows and a sliding door to install. They arrived promptly on their scheduled install date, and got straight to work. By the end of day one, they had all the upstairs windows complete and their work was incredible. Day two came with more of the same, the crew showed up promptly, got straight to work, and when they left they had every window downstairs installed. The third day they again arrived on-time, and got to work installing the door. The door and windows are perfectly installed. The two lads that did the installation did a phenomenal job, and were friendly to boot. I would give them more business if I had any :) The service I received from the company was great. They kept me abreast of anything that was going on with my order. I appreciate my concierge, Christina, she was good at communicating timelines and getting everything scheduled."

Lane Maxwell
Jun 28, 2022

"The two installers were great! They were polite and hard working and they cleaned up all the outside and inside. It was like they were never here. As for the windows, I love them, not only looks great, they are efficient. Now every window in my home has Renewal by Anderson."

Mark Palsgrove
Jun 23, 2022

"We had the pleasure recently of having Andersen replace all of our windows. From the very first interaction with the office personnel through the completion of the project, they have been nothing but professional. From Brian our sales rep to Christina the appointment scheduler, they were a pleasure to interact with. Installers Keith, John, and Evan were fantastic to work with. They went above and beyond to repair an area which was slightly damaged during the removal of a window...caulked and painted it. They took extra precaution to ensure the floors were covered while working inside and cleaned up each day inside and out. We love the look of our new windows and can't wait to enjoy the savings in utilities they'll provide. Thanks so much Renewal by Andersen!!"

Kevin Corrigan
Jun 15, 2022

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