The test you can perform is very simple. Take a lit candle or tissue and if you notice a flutter, there is an air leak, which can result in you over-spending on energy bills.
There are a few quick fixes for drafty windows, like replacing the caulk in spots where it is worn away and you are noticing large gaps. You can also cover the window with a layered curtain or a draft snake to help cover the holes.
If you are noticing signs of wood rot, faulty hardware, or the window simply not closing properly, it is strongly recommended that you look into replacing your current drafty windows with energy efficient replacement ones. Not only will a full replacement help your home function more efficiently from an energy standpoint but will also improve the aesthetic of your home.
Interested in learning more about our energy efficient UniShield windows? Sign up for your free estimate today!