single hung window removal to replace weather stipping

Thank you for reaching out to us. You have a hurricane type of window where the sash isn't made to come out easily or, in some cases, at all. Before we go any further, could you raise your sash and take some photos showing how the balance spiral attaches to the sash? We should be able to advise from there. 

Thanks so much for getting back to us. I was afraid of this. After looking at these photos, we've concluded that your window sash is one of those that aren't designed to be removed. I'm sorry to say that you would need a new sash entirely. With that said, your best bet is to contact the original manufacturer or supplier of the window if you know who they are and can track them down. I know that isn't the answer you were hoping for so I truly apologize for the inconvenience.