The 4x8 Sheathing for a Gable Roof calculator computes the total surface area of a roof, the number of 4x8s and framing nails needed for a gabled roof based on the length, span, pitch and overhang.
INSTRUCTIONS: Choose units and enter the following:
4x8s for Roof Area (n): The calculator returns the following:
The length, span, pitch and overhand determine the surface area of a roof. Based on that, one can roughly calculate the number of 4x8s by dividing by 32 ft2.
The nails for fixing a 4x8 to roof trusses or rafters is based on edge and field spacing of the nails (see below). Clips (c) are used between the boards. This algorithm assumes an edge spacing of 6 inches, and a field spacing of 8 inches.