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Screws for Metal Shed Roof

`"Purlins" = "Screws for Metal Shed Roof"`
Toggle Units
`(L) "Ridge Length"`
ft
in
`(S) "Roof Span"`
ft
in
`(P) "Pitch"`
`(oH) "Overhang"`

The Screws for Metal Shed Roof calculator computes the total number of metal panels screws needed for attach metal panels on a single sloped roof based on the span, ridge length and the front and back overhangs.

INSTRUCTIONS: Choose units and enter the following:

  • (L) Ridge Length (include rakes)
  • (S) Span
  • (P) Pitch (choose: flat, 2/12, 4/12, 6/12, 8/12, 10/12, 12/12, 14/12)
  • (oH) Overhang (default: 12")

Metal Panel Screws for Shed Roof (nS): The calculator returns the number of metal panel screws and the total surface are in square feet.

Metal Panel Screws are a specialized product that include a gasket to seal around the screw head and prevent moisture from penetrating the roof or siding through the screw hole, and a screw tip that cuts through the metal panels and is self-starting.  Metal panel screws often come in painted colors to match the metal panels.  The screws are used to attach metal panels to purlins or sheathing for a metal roof or to girts or sheathing for metal siding. Metal Panel Screws are typically used with a density of 75 screws per 100 square feet of metal roofing or siding area.

Metal Panel Screw Information

  • 75 screws per 100 ft2 of roof surface area is the industry standard for screws in a metal roof.
  • Common Screw Packaging Sizes: 1lb, 5lb, 20lb, 25lb, 30lb
  • Common Metal Panel Screw Weights and Density
    • #10 x 1" - 115 per pound
    • #10 x 11/2" - 95 per pound
    • #10 x 2" - 75 per pound
    • #10 x 21/2" - 65 per pound

The current price of Screws for a Metal Roof is included in the C-Lok, Ag Panel, G-Rib price survey which includes the following:

Cost of Metal Screws (periodic survey)

Metal Panel Screws Calculator provides functions to compute the number of metal panel screws needed for a job based on the shape and dimensions of the roof or wall in metal panels as follows:  

The Math / Science

A Shed Roof is a roof with a single slope (see picture).  Shed Roofs are used in simple agriculture buildings and state of the art modern buildings.  The Metal Panels for a Shed Roof calculator is meant to help with material estimates for a roof.  The rafter length uses the pitch (rise over run) and the span, which is the width plus the two overhangs (front and back).  

The number of screws are based on 75 per every 100 ft2 of area covered by metal panels.

In all cases, confirm your estimates with a professional estimate and adhering to local building codes.

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