If possible, it’s always best to have a professional sign installation company install your banners. These companies have the equipment and expertise to ensure your banner install project is done according to best practices and will give you years of trouble-free service. You can always contact the International Sign Association and inquire about locating an installer in your area. You can find them at this address:
International Sign Association (signs.org)
If you are having the installation done in-house there are some key points to keep in mind. Large vertical banners are very susceptible to wind pressure and act as “sails” when there’s a significant breeze happening. The single-most important aspect of a proper banner install is that the banner is held extremely taut between the top and bottom banner arms. There should be no “twist” in the banner arms relative to the light pole. The top and bottom banner arms need to be in perfect alignment, both at zero degrees in relation to the light pole. If the banner arms are protruding off the light pole at different degrees, the banner, once installed, will have an induced “twist” in its’ profile which will cause it to bow and create an even more significant, wind sail, which is detrimental to the banner integrity and induces undesirable wind load on the light pole itself.
Here is an example of a professionally installed light pole banner. Notice the banner is held extremely taut between the top and bottom banner arms and is projecting off the light pole with no twist.