With wind slits the banner will last longer no matter what size.
This discussion comes all the time & if it is not mesh it is better with wind slits to last longer, improper mounted banners a must, banners up high a must, banners where people can get hurt a must, or to stay up a long period of time a must.
Ok there will be plenty that say not needed but after 40 years & 30 years here in Florida with these new banner materials still use wind slits, ya don't need alot but every 3 to 4 feet be good, hole punch the 2 ends of half moon cut, try to miss lettering.
I have seen alot of banners without & those are the ones that have problems after several months.
Here in Orlando banners are not aloud over a month, Except if the city leaders like your business, like a church I know uses banners without wind slits & they have to replace them because a corner or 2 will rip mostly on bottom the wind just rolls it up, they last about 6 to 9 months, yes same copy.
The city puts up these 18" X 3 ft banners no wind slits, they are always tearing up if up a year, the short term ones last long enough.
The city puts up street banner here I see all the time normally no wind slits since it is up only weeks to a month & have seen it come down a few times or partial
& while it is up it looks like a sail, when wind slits are used the banner just sits better.
Wind slits are up to you, time, & rules
