How To Measure Triangle Roof

Hold the carpenter s level in a horizontal position with one end touching the roof surface.

How to measure triangle roof.

Mathematicians have no special formula for finding the perimeter of a triangle they just add up the lengths of the sides. First use a ruler to draw a line from the center of the longest side of the triangle the eave to the point the roof s peak. The length l times the height h of a triangle is twice its area a2. Then multiply the length of the longest side by the length of this central line.

Finding the perimeter and area of a triangle. Use a level against the underside of the rafter you re measuring to get the most accurate value. Divide this number by 2 to get the square footage of the triangle. Note that the height forms a right angle with the base.

How steep it is in order to apply a slope multiplier. The calculations for figuring roof angles are based on the width and height of the roof. The most precise way to find the roof s slope is by measuring it from the underside. Measure out 12 along the level bottom edge the green line in our sketch.

In this case you would simply measure the base footprint of your home length x width. Access one of the rafters then take the measurement this way. 1 roof square 100 square feet. L 30 feet h 12 feet 30 12 2 180 square feet.

So if you divide your answer of a product of length times height by two you will get the area of a triangle. Click to enlarge the image. This is because the roof section of a building can be likened to a triangle with a base width a height in. Locate the level s 12 inch mark.

This figure shows a triangle with a base of 5 cm and a height of 2 cm. Conversely you could measure the roof from the ground using a very rough approximation.