There are advantages and disadvantages to consider with both higher and lower roof pitches. Though they add to the cost of the building, higher-pitched roofs increase both the total cubic footage and the maximum inside clearance for relatively little money. If you can take advantage of extra space above the eaves, they are a great bargain. Also, the extra volume lessens heat buildup in non- air-conditioned buildings. Higher pitched roofs shed rain and snow more quickly and are less likely to leak. Finally, a higher-pitched roof is more visible, something you should consider when deciding between a painted or Galvalume roof (for more on color choices, see the panel options
Low-pitched roofs also have some definite advantages in certain situations. First of all, they require less material and therefore cost less. A lower pitch reduces total cubic footage, making it easier to heat and cool a building. Because a low-pitched roof is less visible, there is little reason to spend extra money for colored panels. Finally, some people just prefer a lower profile for their building.