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`A = f( "L" , "S" ,"24/12","6/12", "AH" , 12 ) `

Enter a value for all fields

The **Gambrel Roof Surface Area **calculator 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.

**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

**Gambrel Roof Area (A):** The calculator returns the:

- surface area of the gambrel roof in square feet
- number of 4x8 sheets to cover roof area
- number of standard (33.3 ft
^{2}) bundles of shingles needed to cover roof area - number of roofing nails for normal wind conditions
- number of roofing nails for high-wind conditions.

**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.

One should use the pricing for roofing materials that can be bought locally. However, the following prices are for different quality grades of shingles in the United States. The 3 Tab and Architectural Shingles Cost Survey lists the observed price of a bundle of shingles. A bundle of shingles is 33.33 ft2 for 3-tab shingles or 32.8 ft2 for architectural shingles. The survey includes a date, the name of the store. the five price points for shingles: economy, low, median, high and premium.

- Shingle Price Survey Online Source : Lowes
- Shingle Price Survey Date: 12/22/22
- Cost of Premium Shingles: $90.0 USD.
- Cost of High Grade Shingles: $52.34 USD.
- Cost of Medium Grade Shingles: $43.32 USD.
- Cost of Low Grade Shingles: $37.98 USD.
- Cost of Economy Grade Shingles: $36.0 USD.

- Price Survey Online Source : Lowes
- Price Survey Date: 12/28/22
- Cost of High Priced Ridge Shingles: $3.51 USD / ft.
- Cost of Medium Priced Ridge Shingles: $2.4 USD / ft.
- Cost of LOW Price Ridge Shingles: $1.42 USD / ft.
- Cost of High Priced Starter Shingles: $1.47 USD / ft.
- Cost of Medium Priced Starter Shingles: $0.93 USD / ft.
- Cost of LOW Grade Starter Shingles: $0.4 USD / ft.

**NOTE**: **Local pricing should ALWAYS, ALWAYS, ALWAYS be used!** These price points are for estimation convenience only, and there is no guarantee on the prices of the product nor of their availability at the stated price.