You can customize your storm windows according to your taste and preference. There are many shops where you can design your storm window the way you would like it to be and it is up to them to design it for you. A storm window can be externally mounted or it can be internally built and depending upon the type which you choose, there are a wide variety of options to choose from. If you have a special taste for custom made things, then you can go for specially crafted and carved wooden frame storm windows. Other types of frames which are biodegradable and are also worth purchasing are vinyl storm windows. They are extremely tough and durable and offer a good value for your money. There are not too many options to choose from while you choose about the storm window glass. They are generally anti ultraviolet coated in order to provide protection against harmful UV rays. Choosing anything other than glass may result in reduced visibility options and hence they are generally not desirable. Although external storm windows provide better protection to your actual windows, yet they are generally not popular as they are more prone to damages than the internal ones. Custom storm windows are also available online on the various virtual shops where you can design your window the way you need it to be. One important thing that you must consider while designing your storm window is that it should match with the surrounding and it should not stand as the odd one out and look odd in the surrounding in which it is used. You can also go for shapes other than rectangular such as arch design, round shapes, oval shapes, hexagonal, triangular or even customized shapes in order to fit your specific requirements.