A lot of homeowners only realize that they need new windows when they see a crack or feel a draft. Feeling the glass in the winter time and you feel that the inside temperature is very close to the outside temperature is another way to notice that you need new windows. It means that your windows also have lost their efficiency. This is a cutaway of a window. This is the exterior of the window. This is the interior of your window and this is in between. Finding condensation on the exterior of your window that can be wiped away and cleaned off is proof that your window is actually performing properly. Finding condensation in between the panes of glass that cannot be wiped away from either the interior or the exterior is proof that your window is failed and is need of replacement. There are some other subtle ways to notice that your windows may be failing. Look out for faded floors, furniture and window treatments. This is a sign of damaging UV rays entering your house through your windows. You can also monitor the exterior stability of your windows by looking for decay. So now that you know what to look for when considering whether it's time to replace your windows, please know that at window nation every window we sell, whether it is our entry level product or our most advanced window systems, will meet or exceed the standards that will solve our customer's efficiency issues. Every one is more than twice the standard of efficiency for air leakage and each window is equipped with a lifetime transferable warranty for your peace of mind. To learn more, visit windownation.com.