Schedule a Free Consultation

Should You Be Worried About Summer Window Condensation?

Condensation is when water vapor turns into a liquid state. It happens all around us, from the dew forming on the grass in the early morning to water droplets appearing on the outside of a glass of cold water left at room temperature. The same thing happens to windows and doors, especially in winter. Not all people, however, are aware that it also occurs during the warmer months, too.

Should You Be Worried About Summer Window Condensation?

But should you be worried about window condensation in the first place? Continue reading to find out.

Window Condensation in Winter and Summer

As outdoor temperatures drop through the fall and winter months, expect your windows to “sweat” quickly. This happens due to warm, moist indoor air touching the cold windows, doors, frames and walls. The fogging on the window glass happens on the window’s interior.

The reverse of this happens in the summer months when outdoor temperatures increase while the indoor air is kept relatively cool, thanks to air conditioning. Condensation can still occur on your windows, but this time, the fogging on the glass happens on the window’s exterior.

Is Condensation Dangerous?

Many homeowners see window condensation as a detriment to the overall energy efficiency and comfort of their homes. That’s far from the truth – fogging on the glass does look unsightly, but it is not something to worry about, especially in terms of the windows’ functionality. If you have energy-efficient windows installed in your home, condensation is an indication that they are working as intended. You can even wipe off the water droplets as soon as you see them.

It only becomes a big problem if the fogging appears in between the glass panes. If this is the case, it only means that the seals are broken, and the inert gas fill inside has escaped. Your windows are no longer thermally efficient and must be replaced right away.

Renewal by Andersen® of St. Louis is the leading contractor for your window replacement needs. Whether you are doing home remodeling or looking to improve your home’s energy efficiency, we have a wide selection of high-quality replacement windows and doors that will match your preferences and home style. Give us a call at (314) 983-9977, or fill out our contact form to schedule a consultation. We serve homeowners in and around St. Louis.

Reviews

"Have nothing but great things to say about the window installation done today by John Hutchinson with Renewal by Andersen! He was friendly, personable and professional and did a great job installing. He did a great job of putting down roller pads and tarps with next to zero clean up. Would highly recommend them for any window replacement needed!"

Mark V.
Jun 26, 2025

"We had our new Renewal by Andersen windows installed on June 5th & 6th, 2025 and we LOVE them! The quality, beauty, and functionality are best-in-class! The whole experience from dinner presentation at Lazy River Grill, the initial in-home sales consultation and measurement, the regular communications from the salesman and concierge, and the installation team’s professionalism and skills made the process so seamless. This is the second home we have opted for Renewal windows and doors and have been delighted both times! Thank you Renewal by Andersen STL! "

Jeff C.
Jun 7, 2025

"I had an excellent experience with RbA STL. Our designer, Courtney, was great and the finished product is awesome. The installation was easy and the gentlemen left our home cleaner than they found it upon entering. I would recommend RbA STL - you’ll get tired from their constant contacts, and that’s a GOOD thing!"

Jeramy D
Jun 3, 2025

View All Reviews