Horizontal Siding Gambrel Wall

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The Horizontal Siding for Gambrel Wall computes the number and length of horizontal siding panels for a wall under a gambrel roof based on the span, total height, and height and width of the loft and width of the panels.

INSTRUCTIONS: Choose units and enter the following:

(S) Span of Wall (width of wall excluding overhang)
(TH) Total Height (measured total height of wall to apex)
(LH) Loft Height (measured from loft floor to ceiling)
(LW) Loft Width (measured from knee bend to knee bend)
(BH) Base Height (measured from bottom of wall to loft floor)
(PW) Panel Width (coverage width of panel)
(PL) Panel Length (coverage length of panel)
(XT) Extra Length (safety margin added to each panel)
(PD) SUMMARY or DETAILS (details included the length of each row)

Siding for Gambrel Wall (nP): The calculator returns the following:

(n) Number of Rows
(TL) Sum of Row Lengths
(nP) Total Number of Boards or Panels
(A) Surface Area of Wall
(P1) Cut angle for Pitch 1
(P2) Cut angle for Pitch 2
(RL_n) Row Length for each Row
(NS) Number or Screws or Nails based on 16" spacing

The Math / Science

The Loft Width must be less than the span.

`P1 = "atan"((AH)/((S-AW)"/"2))`

`P2 = "atan"( (TH-AH)/(AW"/"2) )`

The rest is step-wise trigonometry for the individual pieces going up by increments equal to the coverage width, and too much to explain here.

Gambrel Roof Calculators

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.

Siding Calculators

Siding for a Rectangular Wall: Computes the siding materials for a rectangular wall (squared corners) for horizontal panels or boards based on the dimensions of the wall and the panels or boards.
Siding for a Gable End Wall: Computes the siding materials (horizontal panels or boards) for a wall under a gable roof end, based on the dimensions of the wall and the panels or boards.
Siding for a Gable End Wall with Large Door or Opening: Computes the siding materials (horizontal panels or boards) for a wall under a gable roof end with a large opening (e.g., garage door) based on the dimensions of the wall and the panels or boards.
Horizontal Siding Gambrel Wall: Computes the number of horizontal rows of siding material, the total surface area and total board feet.
Metal Sidings Gable Ends: Computes the number of vertical panels for a wall under a gable roofline. It also returns the total area of gable end wall, number of screws needed and the cut angle of the panels.
Metal Siding for Gable End with Door: Computes the number of vertical panels for a wall with a large door (e.g., garage door) under a gable roofline. It also returns the total area of gable end wall, number of screws needed and the cut angle of the panels.
Metal Siding for Wall: Computes the number of vertical panels and other metal siding materials for a rectangular wall based on the dimensions.
Metal Siding Gambrel Wall: Computes the number and length of vertical metal panels for a wall under a gambrel roofline. It also includes the area of the wall and the number of metal panel screws needed for the vertical panels.
Metal for Shed (Roof and Walls): Computes the number of vertical metal panels for the roof and walls of a three-sided shed (run-in).
Corrugated Metal Paint or Coating Volume: This estimates the volume of paint or other coating (e.g., spray insulation) is needed for a corrugated surface.

The Siding Calculator has functions and data to help calculate the amount of materials needed for putting siding on a house or other building. The siding functions in the calculator are for siding that is installed horizontally (left to right). Vertical siding, such as metal ag panel requires slightly different math and for that reason are represented in different calculator functions.