Make your interior room decor more beautiful are not spend a lot of your money if you want to make it by yourself. It’s not impossible to make anything what you want since you dare to do it your experiment self. Now I want to share to you about how to decorate a window by using a homemade window valance. But before we starting to make by our self a window valance to decorating our interior room decor then we should to know just a little about the valance. Interior Design.