This Week’s Heat Wave Has Your Windows Sweating

If your windows have been covered in moisture this week, you’re not alone. After several days of Connecticut heat and humidity, plenty of homeowners have noticed foggy glass, water droplets, or condensation collecting on their windows. It’s one of those things that catches your eye and makes you wonder if something is wrong.

The good news? Sometimes it’s completely normal. When it’s hot and humid outside and your air conditioner is working hard to keep your home cool, moisture naturally forms when warm, humid air meets the cooler surface of the glass. During a stretch of weather like we’ve had this week, seeing a little condensation on your windows isn’t unusual. In fact, it’s often just a sign that your air conditioning is doing exactly what it’s supposed to do.

The trick is knowing when condensation is simply a byproduct of extreme weather and when it’s trying to tell you something about your home.

If the moisture disappears as the day goes on, you’re probably in good shape. But if your windows stay wet throughout the day, water is pooling on the sill, or you notice paint beginning to peel or wood trim feeling damp, it’s worth taking a closer look. The same goes if you start seeing mold, mildew, or that unmistakable musty smell around your windows.

One of the biggest warning signs is condensation trapped between the panes of glass. If you can’t wipe the fog away from either side, the insulated seal inside the window has likely failed. Once that happens, the window loses much of its insulating value, and replacement is usually the best long-term solution.

Sometimes the windows aren’t actually the problem at all. They’re simply the first place where excess moisture shows itself.

Everyday activities like cooking, showering, doing laundry, and even running the dishwasher add moisture to the air inside your home. During a humid week, that moisture has nowhere to go if your home isn’t ventilating properly. Basements can make the problem even worse, especially if they’re naturally damp or don’t have a dehumidifier running.

Fortunately, there are a few simple things homeowners can do to help. Run the exhaust fans in your bathrooms and kitchen during and after showers or cooking. If you have a dehumidifier, this is the time of year to put it to work, especially in the basement. Make sure your air conditioning system is clean, the filter has been changed, and it’s running efficiently. Even opening blinds and curtains during the day can improve airflow around your windows and help moisture evaporate more quickly.

It’s also worth taking a few minutes to inspect the weatherstripping around your windows and doors. Worn seals allow warm, humid air to sneak inside, making condensation more likely and forcing your air conditioner to work even harder.

If your home still has older single-pane windows or early double-pane units, they may simply be showing their age. Modern energy-efficient windows do a much better job of reducing condensation, improving comfort, and lowering energy costs throughout the year. While replacement isn’t always necessary, persistent condensation can be a sign that your windows are no longer performing the way they should.

This week’s heat wave won’t last forever, but it does offer a good reminder that our homes are constantly giving us clues about how they’re performing. Most of the time, a little condensation is nothing to lose sleep over. But when it becomes persistent, widespread, or starts causing damage, it’s worth paying attention before a small issue turns into an expensive repair.

Sometimes your windows are just reacting to the weather. Other times, they’re asking for help. Knowing the difference can save you a lot of headaches down the road.

Bob O’Donnell is the owner of O’Donnell Bros. Inc., a Bristol-based home improvement company established in 1975. Email your questions for Bob at info@odonnellbros.com with the subject line “Ask the Pro.” All questions may be considered for publication. To contact Bob for your remodeling needs, call O’Donnell Bros. Inc. at (860) 589-5155 or visit www.odonnellbros.com. Advice is for guidance only.

Steamy Temps Bring Summer Window Woes

This past week’s brutal heat and sky-high humidity had many of us hiding indoors, glued to the AC. But while we were doing our best to stay cool, our windows may have been trying to tell us something. If you’ve noticed water droplets forming on the inside of your windows—or a foggy film that just won’t quit—you’re dealing with summer window condensation. And no, it’s not just a minor annoyance. It can be a sign of bigger problems brewing in your home.

So, what’s going on here?

Condensation forms when warm, humid air hits a cooler surface. In the winter, that’s usually on the inside of your windows. But in the summer, it’s the reverse. Your air conditioner is keeping your indoor air refreshingly cool, while the air outside is heavy and hot. When those two climates meet, like when humid air seeps in and touches your chilly window glass, moisture condenses, and you get that telltale fog or water buildup.

In reality, a little condensation now and then isn’t the end of the world. But if you’re noticing it regularly, especially during extreme heat and humidity, it can point to problems with ventilation, insulation, or moisture control in your home.

In our Connecticut climate, summer humidity is no joke. Add in long showers, laundry, cooking, and even houseplants, and you’ve got a recipe for excess indoor moisture. If your home doesn’t have proper airflow or if your windows aren’t up to the job, that moisture sticks around, and your windows become the battleground where it all shows up.

And here’s the thing: if you ignore it, condensation can go from cosmetic to costly. Excess moisture creates the perfect environment for mold and mildew, which can trigger allergies, irritate lungs, and leave a lingering musty smell. Over time, moisture can also cause wood window frames to warp or rot, damage seals, and reduce your windows’ effectiveness. Even if it’s just clouding your view, you’re still losing out on natural light and visibility.

So, what can you do?

Start with airflow. Use exhaust fans in bathrooms and kitchens, and don’t be afraid to crack a window when the outdoor air is drier. A dehumidifier can also make a significant difference, especially in areas prone to moisture, such as basements.

Next, take a hard look at your windows. If they’re single-pane or older double-pane units, they might not be insulating properly. Modern double- or triple-pane windows are designed to prevent this kind of condensation by minimizing temperature swings on the glass surface.

And don’t forget the little things like sealing air leaks around windows and doors, opening blinds or drapes during the day to improve air circulation, and keeping indoor plant collections in check. Every small step helps.

Condensation might seem like a minor inconvenience, but it’s often a symptom of bigger issues in your home’s comfort and energy efficiency. Take care of it now, and your windows and your wallet will thank you later.

Bob O’Donnell is the owner of O’Donnell Bros. Inc., a Bristol-based home improvement company established in 1975. Got a home issue you’d like Bob to tackle? Email info@odonnellbros.com with the subject line “Ask the Pro.” To contact Bob for your remodeling needs, call O’Donnell Bros. Inc. at (860) 589-5155 or visit http://www.odonnellbros.com. Advice is for guidance only.

Insulation is a Year Round Investment

As summer heat peaks, many homeowners are grateful for the cool comfort provided by their air conditioning. However, running the A/C non-stop can lead to high energy bills, especially if your home isn’t properly insulated.

While most people associate insulation with winter, it’s just as beneficial during the summer. Remember from school science class how heat rises? This means that your top floor and attic are naturally warmer than the lower floors. Without insulation, your attic can become much hotter than the outdoor temperature. If you touch your ceiling and it feels warm, imagine how hot it is above it.

Insufficient insulation forces your air conditioning units to work harder to maintain a comfortable temperature. Whether you have central air or window units, they are straining to cool your home, which spikes your energy costs.

Improving your home’s insulation can make a significant difference. The attic is a prime area for insulation upgrades due to its large space and extreme temperature variations. Although it’s often overlooked because we don’t spend much time there, adding insulation in the attic can be a cost-effective home improvement. Options include blowing loose fiberglass under the floor or laying batts between the floor joists. The best choice depends on your home’s size, attic clearance, and usage. A well-insulated attic not only reduces energy costs but also increases your home’s resale value.

In addition to the attic, sealing gaps around windows and doors helps keep cool air inside. Check your door sweeps and replace them if necessary, and use caulk or sealing tape on windows. This practice will benefit you now and in the winter when you’re trying to retain warm air.

For those with window A/C units, insulating around them is crucial. Use flexible foam to create a good seal at the top and bottom of the unit. Ensure the side curtains are tight-fitting and securely anchored. Without proper insulation, your window A/C unit isn’t operating at full efficiency since much of the cool air escapes outside. Taking these extra steps ensures your A/C works effectively.

Another area to consider is your home’s walls. If your house is older, it may not have adequate wall insulation. Adding insulation to your walls can prevent heat transfer, keeping your home cooler in the summer and warmer in the winter. There are several methods for insulating walls, such as injecting foam insulation or using blown-in cellulose. These options can be a bit more invasive but are worth the investment for the long-term comfort and efficiency of your home.

Additionally, consider insulating your floors, especially if you have a basement or crawl space. Insulating these areas can reduce heat loss and prevent moisture buildup, which can lead to mold and mildew issues. Foam board or rigid foam insulation works well for this purpose and can be installed relatively easily.

Don’t forget about your ductwork. If your home has central air conditioning, ensuring your ducts are well-insulated can prevent energy loss as the cool air travels from the unit to various parts of your home. Leaky or uninsulated ducts can lose up to 30% of the cooling energy, making your system work harder and increasing your energy bills. Sealing and insulating your ducts can improve efficiency and enhance overall comfort.

Lastly, consider the benefits of radiant barriers. These are reflective materials installed in attics to reduce heat gain during the summer. Radiant barriers work by reflecting radiant heat away from your home, helping to keep indoor temperatures down. This is particularly beneficial in hot climates where the sun’s intensity can significantly impact indoor comfort.

Investing in insulation is a smart move for homeowners looking to improve comfort and reduce energy bills year-round. By addressing key areas like the attic, windows, doors, walls, floors, and ductwork, you can create a more energy-efficient home that stays cool in the summer and warm in the winter. The initial investment in insulation will pay off through lower energy costs and increased home value.

Bob O’Donnell is the owner of O’Donnell Bros. Inc., a Bristol-based home improvement company established in 1975. Email your questions for Bob to info@odonnellbros.com with the subject line “Ask the Pro.” All questions may be considered for publication. To contact Bob for your remodeling needs, call O’Donnell Bros. Inc. at (860) 589-5155 or visit www.odonnellbros.com. Advice is for guidance only.