Roof Construction

Rafter Length & Cost Calculator – Prices for 2022

Roof Rafter Calculator estimates 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. All prices were updated in Jan 2022.

2022 LUMBER PRICES We first published this Rafter Calculator back in Dec 2015. Since them, we automatically added about 3% / year to account for inflation. Since lumber prices were more or less stable, we did not see a need to get new price quotes from our suppliers for each size of 2x pine or LVL.

Come COVID-19 era,

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How To Determine Roof Pitch

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

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

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 – slope or steepness.

Roof pitch is represented in inches rise of 12 inches run. For example a “3 pitch” or “3 in 12 pitch” or “3/12 pitch”, all mean that the roof rises 3 inches, for every 12 inches of it’s horizontal run.

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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.


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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