The Roofing Nails for Dormers calculator computes the number and weight of roofing nails needed for one or more roof dormers based on the dimensions.
INSTRUCTIONS: Choose units and enter the following:
- (DD) Dormer Depth
- (DW) Dormer Width
- (P1) Pitch of Main Roof (choose pitch from list)
- (P2) Pitch of Dormer Gable (choose pitch from list)
- (n) Number of Dormers
Shingles for Dormers (SH): The calculator returns:
- (TA) Area: Total surface area of dormer(s) in square feet.
- (rN) Roofing Nails:
- Normal Wind: Number of Roofing nails needed under normal wind conditions and the associated weight of roofing nails.
- High Wind: Number of Roofing nails needed under high wind conditions and the associated weight of roofing nails.
Items with units can be automatically converted to compatible units via the pull-down window.
The Math / Science
- The calculator computes the surface area of the dormer(s).
- Computes the number of nails needed for normal wind conditions.
- Computes the weight of roofing nails, assuming a nominal 1 1/4" smooth shank roofing nail
- Computes the number of nails needed under high wind conditions.
- Computes the weight of roofing nails for high wind, also assuming a nominal 1 1/4" smooth shank roofing nail.
Roofing Nail Calculators:
- Roofing Nails for Gable Roof: This computes the number of roofing nails needed for a common gabled roof based on roof dimensions and wind conditions.
- Roofing Nails for a Gambrel Roof: This computes the number of roofing nails to shingle a gambrel roof based on the dimensions and wind conditions.
- Roofing Nails for a Hip Roof: This computes the number of roofing nails to shingle a hip roof based on the dimensions under normal and high wind conditions.
- Roofing Nails for a Double Hip Roof: This computes the number and weight of roofing nails for a hip roof with a hip roof dormer based on the dimensions.
- Roofing Nails for a Shed Roof: This computes the total number roofing nails and their weight to shingle a single sloped roof based on the span, ridge length and the front and back overhangs.
- Roofing Nails for a Dormer: This computes the number and weight of roofing nails needed for one or more roof dormers based on the dimensions.
- Roofing Nails for Irregular Roof Section: This computes the number roofing nails (count and weight) for an irregular section of a roof based on the dimensions.
Roofing Nail Data:
- Roofing Nail Density in Normal Wind: The number of Roofing Nails for a Square of Shingles in normal conditions is 348.
- Roofing Nail Density in High Wind: The number of Roofing Nails for a Square of Shingles in HIGH WIND conditions is 522.
- Weight of Roofing Nails: A single smooth shank 1-1/4" roofing nail weighs 0.00511247443762781 lbs.
Roofing Nail Guidance
Roofing Nails are used to attach shingles to sheathing on a roof. There are two densities used for the number of roofing nails needed per shingle, normal wind and high wind. This can be seen in the shingle diagram to the right. The top image shows four nails per shingle above the tab cuts. This is for normal wind conditions. The lower image shows six nails per single with a double nail above the two central tab cuts. This is for high wind conditions in exposed places like on the edge of bodies of water, on top of mountains or other exposed places with no wind breaks. High winds are experienced in areas with little cover from wind breaks. Such areas include deserts, prairies, mountain tops and areas adjacent to large bodies of water. High winds are also associated with areas prone to hurricanes.
Note that for both normal and high wind applications, the roofing nails go just below the sealant strip.
Roofing nails are sold by weight in many places. The weight of the nails is based on a 5lb box of 1-1/4" smooth shank nails having 978 nails. That's 0.0818 ounces per nail.
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
