Installing storm windows can sometimes seem to be a big challenge and if done improperly then it may cost you a lot more than it actually does. They generally reduce your electricity bills by providing good insulation against external heat and cold by trapping a layer of air in between them and the actual window. Hence they need to be made air tight in order to increase their efficiency. In order to ensure a proper fit, you need to be very careful about the measurements. You should always go in the following order while taking any measurements. First you should measure the top, then bottom, then left and finally move on to the right side and then to make sure about all the measurements, your should take a final measurement from one corner to the other. Before you finally put the frame in place, you should clean the inside window because after you fix the storm window in place, then you won’t be able to access the inner actual window. The job of designing the fame can be left to that of a carpenter if you are going for a wooden frame. The next step is simple as it involves putting the frame in its place and then fixing it with screws which are generally provide with the wooden frame. The next step is to make your window air tight in order to provide insulation against extremes of weather condition. For this you can apply caulk between casing and the window but you have to be sure not to cover the bottom holes as they are ventilation holes which are specially provided to decrease condensation and are not screw holes. With the correct guidance installing your storm windows can be an easy job and thus save you from wasting a lot of money.