The Screws for a Metal Roof calculator computes the number of special screws needed for a metal roof. Metal roofs are typically connected to purlins or sub-boards using special screws that self-start through the metal and have a rubber collar to seal out water.
INSTRUCTIONS: Choose units and enter the following:
Screws for a Metal Roof (SK): The calculator returns the number of screws needed for a metal roof. The calculator also returns the Surface Area of the Roof.
The Screws for a Metal Roof calculator computes the area of the roof based on the ridge length, span, overhang and pitch. It then calculates the number of screws needed based on 75 screws per 100 ft2 of roof.