It would be great if the windows installed in your home had the same longevity as the house itself, but sadly, this just isn't the case. While most windows are good for a few decades, the time does come when they start to leak air and water. When this happens, window replacement should be high on your future home repair list.

If you live in an older home and suspect you might need to get replacement windows, use these four simple tests to check them.

Test #1: Listen for Cars and Other Outside Noises

Windows that are tight and secure should not let in outdoor noise. For this reason, one of the easiest ways to test your home's windows is to close all of them and then listen for outside noise. If you hear the kid next door playing ball or each car that drives by, then your windows likely are in need of replacement.

Test #2: Use a Candle to Check for Air Leaks

As residential windows age and their frames are moved around by the home's natural setting, it is normal for them to develop air leaks. This is a big problem because each leaks lowers the energy efficiency of your home.

The easiest way to check for air leaks is to open up all of your blinds and then run a lit candle around the window frame. Move the candle slowly and watch the flame for areas where it moves around or is extinguished. Where the flame moves there is an air leak you need to address.

Test #3: Look for Light Around Window Frames at Night

If you shine a bright flashlight around the interior frames of your home's windows at night, you should not be able to see any of the light outdoors. In fact, this is a great way to check for cracks or gaps around windows. Wait until there is a dark night without a moon and then have someone shine a flashlight around each of your home's windows while you stand outdoors and look for the light shining through.

Test #4: Check Your Carpets for Faded Areas Near Windows

Lastly, as you walk around your home inspecting the windows, take a look at the carpets and other flooring materials where the sun shines during the day. If you notice the flooring is faded, then this is a red flag that the windows are letting too many ultraviolet rays shine through.