Screws for Metal Dormer

The Screws for Metal Panel Dormers calculator computes the number of metal panels screws needed for one or more roof metal paneled dormers based on the dimensions.

INSTRUCTIONS: Choose units and enter the following:

• (DD) Dormer Depth
• (DW) Dormer Width
• (P₂) Pitch of Dormer Gable (choose pitch from list)
• (P₁) Pitch of Main Roof (choose pitch from list)
• (n) Number of Dormers

Screws for Metal Dormer (m): The calculator returns the number of metal panel screws needed and the surface area of the dormers.

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)

• $0.09 USD/screw - Screws (with seal gasket) - dollars per screw 
  • Date Survey: 3/7/24
  • Source of Pricing: CN Metals

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:  

• Screws for a Gabled Metal Roof 
• Screws for a Metal Hip Roof
• Screws for a Metal Gambrel Roof
• Screws for a Metal Shed Roof
• Screws for a Metal Dormer
• Screws for Metal Shed or Run-in
• Screws for Metal Siding on a Gable End
• Screws for Metal Siding on a Gable End with Door
• Screws for Metal Siding Rectangular Wall
• Screws for Metal Siding Gambrel End Wall

The Math / Science

Safety Tolerances

An addition of the TO parameter (default of 3") s added to the following dimensions. 

• (r) Ridge Cap
• (sG) Snow Guard
• (j) Valley Trim
• (PL) Panel Length
• (aT) Angle Trim

It's better to have too much and have to cut it, than not enough.

Dormer Calculators

• Surface Area of Dormers: This computes the roofing surface area for dormers based on the dimensions and number of dormers.
• Metal for Dormers: This computes the metal roof materials (panels, ridge cap and trim) for one or more roof dormers based on the dimensions
• Screws for Metal Dormers: This computes the number of metal panels screws needed for one or more roof metal paneled dormers based on the dimensions.
• 4x8s for Dormers: This computes the number of 4x8 sheathing needed for one or more roof dormers based on the dimensions.
• Shingles for Dormers: This computes the number of shingle bundles needed for one or more roof dormers based on the dimensions. It also includes ridge shingles, valley lengths for flashing, and roofing nails.
• Underlayment for Dormers: This computes the amount of underlayment needed and estimates the cost of underlayment materials.
• Roofing Nails for Dormers: This computes the number and weight of roofing nails needed for one or more roof dormers based on the dimensions.
• Purlins for Dormers: This computes the total number and length of purlins (roof support boards) for needed for one or more roof dormers based on the dimensions.
• Dormer Geometries: This computes the diagram measurements for a dormer based on the dimension.

Roof Types

Roofing Calculators