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: 2/3/23
- 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
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.
Roof Calculators
- Gabled Roof
- Hip Roof
- Shed Roof
- Dormers
Building Calculators
- Total Building Materials Calculator
- Pitch of a Roof - Computes angle of incline in the roof in both degrees and rise over 12" run (e.g. 26.6o : 6/12) based on the length of the rise and run.
- Number of Trusses Needed for a Roof - number of trusses needed based on the roof width and the truss spacing.
- 4x8s needed for a roof - Calculates the number of 4x8 sheets needed to cover a roof.
- Roofing nails needed for a roof - Calculates the number of roofing nails needed for a roof in normal and high wind conditions.
- Number and Length of Metal Roof Panels - Computes the length and number of metal panels and trim pieces for a metal roof.
- Screws for a Metal Roof - Computes the number of screws needed for a metal roof.
- Number and Length of Purlins for a Roof - Computes the number of purlins for a roof based on dimensions and spacing.
- Number and Length of Rafters - Computes the number and length of rafter boards based on roof dimensions and spacing.
- Number and Length of Rafter and Collar ties - Computes the number and length of rafter ties and collar ties based on roof dimensions and spacing.
- Number and Length of wall top and bottom wall plates
- Number of Studs for a Room
- Number of Studs in a Wall
- Room Interior Area (wall and ceiling)
- Cubic Feet in a Room (volume)
- Number of 4x8 or 4x12 Sheets for a Room
- Number and Length of Floor Joists
- Number of Joist Hangers
- Compute the Cost of Floor Joists
- Compute iJoists for larger floors
- Compute the Number of 4x8 Sheets to cover the Deck or Floor
- Compute the number of Decking Boards to cover the deck or floor
Roofing Geometry Calculators