Roof Construction

Rafter Calculator – Estimate Length And Cost To Replace Roof Rafters

Roof Rafter Calculator will estimate the Length, Board Size, Quantity, Cost per board and Total Cost of Lumber!

The estimates are based on your house foot print (length and width) and roof slope. Prices are based on quotes from multiple lumber yards and building material suppliers.

Gable width (Span):

ft.

in.

Roof Length:

ft.

in.

Roof Overhangs:

ft.

in.

Roof Pitch

/ 12″ slope.

Rafter Spacing

12″ on center
16″ on center
20″ on center

Board Size (nominal)

2″ x 8″
2″ x 10″
2″ x 12″

Rafter Lenght
Quantity
Lumber Size
Rafter Cost
Total Cost

0 ft.
0 pcs.
0 ft.
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How To Calculate Roof Pitch – DIY Guide

Using roof pitch you can quickly and accurately calculate a roof’s size and the amount of materials needed for installation.

Most contractors use this measurement as a primary way to calculate roof area.

In this guide:

Understanding roof pitch
DIY Calculation Method 1 – using ladder and tape measure
DIY Calculation Method 2 – making an estimate from the ground
Using Pitch Formula to get an accurate roof size

What is roof pitch?

“Roof Pitch” is a term you may often hear from a roofer, an architect or a framing contractor / builder. It is the most common way in US and Canada to describe a roof’s basic quality –

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4 Essential Parts Of A Roof

Here is a detailed guide to the most important roof parts: underlayment, insulation, ice and water barrier, and ventilation.

Getting high quality roof components should be a top priority if you want to have leak-free, long lasting protection. Sometimes contractors may take advantage of a homeowner’s lack of knowledge and install low quality roofing systems together with expensive shingles.

Don’t let this happen to you!

Find out which materials we recommend to use, and how to install them correctly. These offer the best value and long term performance in harsh weather conditions.

Underlayment

Parts Of A RoofOne of the most essential features of a durable roofing system is underlayment. It provides critical protection and serves as an additional barrier against the elements.

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