Roof Slope Factor Table

Accurate roof calculations are achieved using this table and all you need to do is measure the roof width and length and then you are ready to do a roof pitchmeasurement.

Roof slope factor table.

Place the level at the center of the top ridge. The roof pitch multiplier table is very helpful in giving correct and reliable roof measurements and uses pythagorean theory. This table lists all of the common roof slopes expressed as rise run roof angle roof slope slope grade and walk ability. To obtain an accurate roof pitch measurement properly measure the rise and run.

Using a tape measure make a pencil mark 12 inches from the end of a carpenter s level. Given that roofs are normally spotted from a distance long before any windows and doors they will be a large determining factor as to what someone will think of when they look at your property. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. Here are the steps to assist you so that you can do it all by yourself.

This article series gives clear examples just about every possible way to figure out any or all roof dimensions and measurements expressing the roof area width length slope rise run and unit rise in inches per foot. The combination of two numbers are used to display or show the roof pitch. For roof slopes expressed as x in 12 rise in run the roof pitch multiplier is determined by finding the square root of rise run 1. The following table shows how the same common roof slopes can be expressed using rise in run ratios degrees and percentages.

From here note down the reading of the level to the. See below after the table for directions on how to convert any roof slope from one form to another even roof slopes not shown in the table. For any roof slope expressed as x in 12 rise in run the hip and valley factor is determined by finding the square root of rise run 2. Take a ladder and reach to the top of the roof.

Degrees to roof pitch rise in run to see a table. A roof pitch multiplier also called a roof pitch factor is a number that is multiplied by the area covered by a sloped roof to produce the area of the actual surface of the roof. You can tie the ladder to the gutter or the fascia board. It s just a little math.

For many home owners the roof is a hugely important feature of the home and is the key section of the home which is seen from the exterior. Roof pitch is a term describing how steep or flat your roof slope is. Also see our page quick reference. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.

Divide the rise by the run the run is 12.