Roof Slope Factor Table

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 slope factor table. 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. 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. Here are the steps to assist you so that you can do it all by yourself. Take a ladder and reach to the top of the roof.

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. 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. To obtain an accurate roof pitch measurement properly measure the rise and run. 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.

You can tie the ladder to the gutter or the fascia board. This table lists all of the common roof slopes expressed as rise run roof angle roof slope slope grade and walk ability. It s just a little math. The hip and valley factor varies according to the slope of the roof as shown in the table below.

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 pitch refers to the measurement of the slope of a roof and you express this as a ratio. 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. From here note down the reading of the level to the.

Place the level at the center of the top ridge. The combination of two numbers are used to display or show the roof pitch. Degrees to roof pitch rise in run to see a table. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.

The roof pitch multiplier table is very helpful in giving correct and reliable roof measurements and uses pythagorean theory. Using a tape measure make a pencil mark 12 inches from the end of a carpenter s level. Divide the rise by the run the run is 12. Roof pitch is a term describing how steep or flat your roof slope is.

The following table shows how the same common roof slopes can be expressed using rise in run ratios degrees and percentages.