Roof Slope Factor Table

Using a tape measure make a pencil mark 12 inches from the end of a carpenter s level.

Roof slope factor table.

Roof pitch is a term describing how steep or flat your roof slope is. 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. 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. Here are the steps to assist you so that you can do it all by yourself.

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. The hip and valley factor varies according to the slope of the roof as shown in the table below. Place the level at the center of the top ridge. You can tie the ladder to the gutter or the fascia board.

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. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. To obtain an accurate roof pitch measurement properly measure the rise and run.

The combination of two numbers are used to display or show the roof pitch. 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. The following table shows how the same common roof slopes can be expressed using rise in run ratios degrees and percentages. 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.

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. Although there s isn t any standard pitch of a roof used on all kinds of sloped roofs you can determine the range of pitches by using a roof angle calculator and by considering factors like the local climate and roofing materials. Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio. Divide the rise by the run the run is 12.

From here note down the reading of the level to the. Take a ladder and reach to the top of the roof. Degrees to roof pitch rise in run to see a table. It s just a little math.

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