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The **Roofing Nails for Shingles on Gambrel Roof **calculator computes the number of roofing nails to shingle a gambrel roof based on the dimensions and wind conditions.

**INSTRUCTIONS:** Choose units and enter the following:

**(L)**Ridge Length**(S)**Span of Roof- (
**P**) Lower Pitch_{1} - (
**P**) Upper Pitch_{2} - (
**LH**) Loft Height **(oH)**Overhang

**Roofing Nails for a Gambrel Roof (rN):** The calculator returns the:

**(A) Area**: Total surface area of gambrel roof 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 gambrel roof.
- 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 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 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 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.

**Gambrel Roof Surface Area**: This computes the total surface area of a gambrel roof, and the number of 4x8s and bundle of shingles needed for a roof based on the dimensions below.**Trusses Needed for Roof**: This computes the number of trusses needed for a roof based on the ridge length and spacing.**Sheathing for Gambrel Roof**: This computes the number of 4x8 sheets to cover a gambrel roof based on the dimensions of the roof. It also includes the number of framing nails needed to nail the sheets to the roof based on whether clips are used or blocking.**Gambrel Roof Shingles**: This computes the number of bundles of shingles and ridge shingles needed for a gambrel roof based on the dimensions and bundle coverage.**Roofing Nails for Gambrell Roof**: This computes the number of roofing nails to shingle a gambrel roof based on the dimensions and wind conditions.**Underlayment for Gambrel Roof:**This computes the total surface area of a gambrel roof for underlayment based on the dimensions below and the estimated cost based on the area and unit price of underlayment material**Purlins for Gambrel Roof**: This computes the length and number of rows of purlins needed for a gambrel roof based on the dimensions**Metal Panels for Gambrel Roof:**This computes the length and number of vertical metal panels needed for a gambrel roof based on the dimensions. It also provides the length of the trim pieces.**Horizontal Siding for Gambrel Wall**: This compute the number of horizontal siding panels (e.g., vinyl or cedar) for a wall under a gambrel shaped roof line.**Screws for Gambrel Metal Roof**: This computes the number of screws to attach metal panels needed for a gambrel roof based on the dimensions. It also includes the total square feet and the number of metal screws needed at 0.75 screws per square foot.**Metal Panels for Gambrel Wall**: This computes the number of vertical siding panels, their lengths and the total length of vertical panels on a wall under a gambrel roof. It also includes the total square feet and the number of metal screws needed at 0.75 screws per square foot.**Gambrel Pitch Angles**: This computes the upper and lower pitch angles and rafter lengths bases on the span, total height, and height and width of the loft.**Gambrel Rafter Lengths**: This computes the upper and lower rafter lengths, loft width and total height based on the upper and lower pitch, span and loft height.**Gambrel Angle**: Compute the interface angle where the two pitched surfaces meet on the roof.**Screws for Metal Siding Gambrel End Wall:**Computes the number of metal panel screws needed for vertical metal panels on a wall under a gambrel roof.