Yes, it needs to be said. Banners are wonderful. Easy to make, easy to put up, easy to take down, easy, easy, easy. However, they are far from permanent. If a company has a quality product and they have a ratty banner as their store front, how does that affect the customers urge to buy from that company? To be honest it takes a good sign for me to enter and receive services from an establishment that has bad signage.
Banners are made from a material that can withstand the elements for a short amount of time, they can fade, crack, rip, bend, etc. Some companies will put wind slits in the banner to help with the wind force, but that isn’t a save all. You are cutting into a material and sometimes the wind slits will rip the banner even more. Same method used to make paper tear, with small cuts called perforations. The banner will tear in those locations.
In windy locations, use a mesh type material that will allow 36% of the air to pass through the banner. It will increase the banner life in windy locations, while presenting a good image detail. Something to consider, before allowing your sign company to cut banner wind-slots in your perfectly new banner.
Best thing? Keep the banner for advertising short-term sales, events, etc. Make your statement about your business with a high quality sign that you can be proud of for years to come. There is a sign for every purpose and a reputable sign company can help you with those decisions.