12x12 single slope shed. Wood slat spacing??

Thanks Preston. This question must be answered by the manufacturer of the product you are installing. It all depends upon product design and testing.

I built an old single pitch shed and I am going to install 2x4 slats directly on the rafters vertically. What spacing is best? Some say 12” but I don’t see why 24” spacing will work as well. It’s nothing fancy. Just wanna know what spacing I should use