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Pyramid Roof Underlayment

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May 15, 2023, 12:55:06 PM
Created by
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May 12, 2023, 4:40:21 PM
` = "Pyramid Roof Underlayment"`
`(S)"Side-span of Roof"`
`(theta)"Pitch of Roof"`
`(oH)"Overhang"`
`(UP)"Unit Price of Underlayment"`
Tags
Roofing Shingles pyramid Underlayment Pyramid Hip Roof
UUID
afa7c395-f0e3-11ed-8f09-bc764e203090

The Pyramid Roof Underlayment and Cost calculator computes the surface area of a pyramid hip roof based on the dimensions.  The surface area includes the four sides (faces).  It then uses the surface area to compute the cost of underlayment based on the unit price (price per square feet) of underlayment material.

INSTRUCTIONS: Choose units and enter the following:

  • (S) Side-span of Roof
  • (P) Pitch (choose pitch from list)
  • (oH) Overhang
  • (UP) Unit Price of Underlayment

Pyramid Roof Underlayment and Cost (TC): The calculator returns the total pyramid roof area underlayment in square feet (ft2) and the cost in U.S. dollars.  

Note: the default Unit Price per Square Foot is equal to the cost of Polypropylene below.  Enter any other value you wish to override the default.

The Math / Science

Pyramid Hip Roof

A Pyramid Hip Roof is a special case of a hip roof where the hips come to a single point and do not form a ridge line.  All four faces create triangular ends (faces) to the roof which are all exposed to rain and snow from above and require roofing material.

The specifications of a Pyramid Hip Roof can be defined by a span, pitch and overhang (see diagram). These calculators compute the area, hip ridge lengths and materials required for a pyramid hip roof.

Roofing Materials

The roofing materials to cover a pyramid roof include:

Pyramid Hip Roof Geometries

A pyramid hip roof is geometrically a square based pyramid.  The surface area and four hip ridge lengths can be computed using simple trigonometry using the span, including overhang and the pitch. 

The photograph shows two sheds located in Colonial Williamsburg, Virginia that have pyramid hip roofs.

Pyramid Hip Roof Calculators

Underlayment comes in different types of materials and in different sizes of products measured in square feet. To compute the Unit Price per Square Feet  CLICK HERE.  A pop-up calculator will let you enter the product size (e.g., 265 square feet) and the total cost and will return the dollars per square feet.

Underlayment Pricing Data

The underlayment pricing data contains the following information in each record.

All pricing is in U.S. dollars per square feet of underlayment.

IMPORANT NOTE

All pricing in vCalc is for use by our community to provide rough estimates on project costs.  One should always use local pricing for the most accurate pricing available.  Price surveys are based on listed prices on the websites of the companies listed and only periodically updated at this time.  The product retailer surveyed is randomly selected. No assertions or recommendations are made on retailer reliability, service quality or product value, availability or any other implied guarantees.  This is simply a price survey to help with rough estimates and the math of construction.

Underlayment Calculators

Hip Roof Calculators

Roof Calculators

Building Calculators

Roofing Geometry Calculators
This equation, Pyramid Roof Underlayment, references 1 page
This equation, Pyramid Roof Underlayment, is used in 2 pages
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