On average, windows can last for 15–30 years. However, the exact service life depends on several factors, including the material, exposure to elements, and how well you take care of the frames.
That’s why judging the windows’ performance can be a better approach than going by lifespan estimates. Your windows should offer ventilation while helping with energy savings and noise control. It might be time for a replacement if they’re no longer getting the job done.
This guide will help you figure out how often you should replace your windows. We will also walk you through the factors at play, from the difference between the common materials to the effect of UV radiation.
Average Lifespan of Different Window Materials
Certain materials are more durable than others. Fiberglass, for instance, is generally a long-lasting yet low-maintenance window material.
Let’s check the top materials in more detail.
Vinyl Windows
People might think of laminated vinyl as a cheap alternative to classic timber windows. But this doesn’t necessarily mean these modern windows are made from a flimsy material.
High-quality vinyl can last for 20 years with minimal maintenance efforts on your part. Periodic cleanings with soap and water will do the trick here, which gives vinyl an edge over wood frames.
Fusion welding can also extend the lifespan since it adds strength and stability. It’s at least a more stable setup than vinyl frames with screws at the corners since those can shift out of the window square over time.
Depending on the manufacturer, your energy-efficient vinyl window could come with a 20-year warranty against seal failure, a 10-year coverage for the material itself, or even a lifetime transferable warranty for peeling.
Aluminium Windows
Aluminum windows are typically lightweight yet robust. They also resist corrosion, are protected from infestations, and can handle a significant amount of wear and tear.
The slim aluminum frames are available as casement windows, tilt-and-turn construction, and both single and double-hung windows. So, finding a window style that works for your home or business shouldn’t be hard.
As long as you get your frames from a reputable company, you can get a guarantee for 25 years or so. Some Al-clad window manufacturers claim their products can last 30+ years with minimal maintenance.
Side Note: Remember to use a non-abrasive cleaning agent and a soft cloth when wiping the grime off your aluminum windows.
Wood Windows
Generally speaking, wood windows can last 15–30 years, but high-quality timber can last even longer. Hardwood frames (strong and dense wood) are more durable than their softwood counterparts.
Most wood frames need a lot of TLC, though. Otherwise, the material can split, peel, and warp.
If you’re concerned about the level of maintenance needed, you might want to consider wood systems with exterior cladding.
Fiberglass Windows
Fiberglass isn’t as mainstream as the other options on the list. However, it’s available in many window styles, including bay-and-bow, casement, picture, and sliding windows. It also stands out with its strength.
Compared to alternatives on the market, fiberglass windows are durable. Some fiberglass products are as strong as steel, and you can only cut them with diamond-tipped blades.
Unlike wood windows, fiberglass windows don’t warp or rot. So, the need for re-painting and sealing is low. But if you do want to paint/stain the frame down the road, you can. That isn’t always an option with vinyl windows.
Even the regular maintenance is pretty straightforward. Just wipe the frame down with mild soap and water.
All in all, a fiberglass product can last for decades. It’ll perform well even under harsh conditions (high UV index, high humidity, heavy rainfall, etc.).
Factors Affecting Windows Lifespan in Chicagoland
Everything from incorrect installation to poor maintenance schedules can cut your windows’ lifespan short. Even installing protective layers can make a difference. Awnings, for instance, can shield the frames from excess moisture.
Other factors, however, are out of your control. This includes exposure to the elements and extreme weather.
Here are four such factors to consider before deciding on a business/home window replacement.
Temperature
Some types of vinyl can warp when exposed to too much heat.
Plus, seasonal temperature cycles can be a problem with double-glazed window panes.
While the gas between the panes is inert, it could expand and contract with temperature changes. When it does, it can put pressure on the sealant material that’s holding the panes together.
UV
Some window frames are prone to UV degradation and will become more brittle with use. They could crack at some point, as well. That said, the risk gets lower when you go with manufacturers that use UV-stable materials. Remember that even vinyl can be UV-stable.
If you have wood windows, you might notice the frames turning yellow over time. That’s because the radiation affects the lignin fragments in the timber structure.
Regularly re-painting and re-varnishing can help slow down this degradation. In some cases, homeowners have to do touch-ups every 3–5 years to protect their wood frames from the elements.
Side Note: The UV index in Chicago can reach 6, especially during July and August. Consider opting for triple-glazed windows. This isn’t necessarily about extending the frame’s lifespan, but it’s more about blocking harmful rays from getting into your home or business.
Humidity and Moisture
Chicago summers are warm, humid, and quite wet. This sort of climate can wear down window frames faster. The most obvious concern here is rot. Once the tiny mold spores settle in an area of damp wood, the whole frame is at risk.
You’ll need to worry about windows with constant condensation, too. The trapped moist air turns the material into a breeding ground for mold and mildew.
Note that salt build-up is also a considerable threat in any coastal area. These deposits can speed up the degradation process, leave stubborn stains, and ruin the coating.
Salt particles can get into porous materials. The crystals can then expand and weaken the structure from the inside out, leading to cracks.
Even the glass panel isn’t safe from salt-related damage since the deposits can permanently etch the surface. That’s why cleaning the frame and the panel now and then is vital.
Wind
In Chicago, the wind speed varies a lot from one season to another, but it can get particularly windy from October to May.
Over time, these strong winds can exert pressure on the frame. In addition, the debris carried by the air currents can dent and scuff the window. And if you live on a high floor, the risk increases.
To reduce the extent of the damage, pick a window construction designed with high winds in mind. It’s also worth noting that a standard double-glazed window (which can last for around 20 years) can be sturdier than a single-pane (with an average lifespan of 15 years).
Some manufacturers, like Simonton, reinforce vinyl windows with steel in frames and sash rails. This can boost the structural integrity and reduce wear and tear in high-wind situations.
Get in touch with us to learn more about our most popular manufacturers and their construction techniques.
Signs That You Need Window Replacement
You might want new windows simply because your current ones are outdated and not doing your curb appeal any favors. But when can you say that you need new windows?
After all, some types of damage can be repaired. For instance, minor cracks can be sealed with caulk, and extra insulation can be added to boost energy efficiency.
We have a complete guide that will help you decide when to get repairs and when to opt for replacement windows. If you’re in a rush, check out these four situations:
Visible Damage
Any visible damage that makes the window difficult or impossible to operate can be a sign that you need replacements. Take, for example, windows that you can’t open easily.
A broken pane or frame is also an issue because it can mean the system is no longer airtight. It’ll compromise your security and energy efficiency. Damaged frames might also put uneven stress on the glass, which will only make the problem worse.
Drafts
If you notice cold drafts, it might be time for a routine check. Maybe the sills and sashes are degraded. Perhaps the window is out of square because it was installed incorrectly the first time around.
Keep in mind that a window that leaks air won’t just affect your energy efficiency. Water could also leak with heavy rainfall.
Side Note: Before looking at replacements, do the incense stick test to confirm that the leak/draft is coming from the window. Vents, baseboards, doors, switch plates, and wall-mounted ACs are all possible culprits.
Condensation
Condensation (or “sweating glass”) isn’t always a sign there’s something wrong with your windows. It’s actually common in Chicagoland as the temperatures drop in the winter.
You might be seeing condensation on your windows because the humidity inside your home is high. This can happen from everyday activities that add excess moisture to the air. These activities could be something as simple as showering and running the dishwasher.
Once this moist air hits a cool surface (like the glass panes on your windows), it condenses and forms water beads. And if it’s particularly cold outside, the beads will turn to ice.
This is just temporary condensation. All you need to do is wipe it before it freezes. If the water-bead look bothers you, you can control the indoor humidity level by using a humidifier and double-checking that exhaust fans are working.
That being said, condensation on windows can be a red flag if:
- It’s no longer a temporary issue. Condensation beads remain on the window even when it’s warm outside.
- The beading is so frequent that the water keeps running down the walls. This could damage the paint over time.
- It’s starting to smell musty inside.
- The condensation is between the glass panes, not on the interior or the exterior panes. This could point to an underlying seal failure!
Sound
You can’t realistically expect any window to be fully soundproof. However, a drop in the soundproofing performance can indicate a bigger problem.
Overall, this is a common complaint with old and single-pane windows. So, when you do get a replacement, it would be wise to upgrade to double- or even triple-pane systems. But you might want to replace all your windows at once to see a significant change in the noise level.
TL;DR
Windows usually last for 15–30 years. But regardless of how long it’s been since the installation, you’ll need to consider replacing windows that are too damaged to offer decent insulation and noise control.
With 60 years of experience, our team at Evergreen Door & Window is here to help you find the best residential or commercial window replacement for your needs.
