Roof slopes of less than 6 in 12 use
8 foot battens with drain slots every 4 feet
4 foot double battens with drain slots every 4 feet
8 foot battens with 1/2 inch drain slots
4 foot battens with 1/2 inch drain slots between ends
(D) 4 foot battens with 1/2 inch drain slots between ends
Explanation: