how do louvered roofs create long spans
On the Traditional Louvered Roof System the louvers will over have the rafter 1â instead of 2â like on the Pergola Style Louvered Roof making it necessary in some cases to order and extra rafter for support.90 degree prefabricated corners come with the system.ouvered Roofs by American Louvered Roof Systems have been calculated to qualify for Miami-Dade County wind requirements which are the toughest in the Country. American Louvered Roof Systems has Engineering specifications for most States and are available to purchase with a wet stamp generic copy or site specific.