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
