How to measure the roof

Video: How to measure a roof and calculate square feet. | 01/2020

Content

Steps
Method 1 of 3: Roof Measurement Scheme
Method 2 of 3: Measuring the Roof from the Ground
Method 3 of 3: Simple Rough Measurement
What do you need

You may find it a little easier when you learn that there are different ways to measure a roof. If your roof is too steep, or you don't want to climb stairs to climbing heights, then you can measure your roof from the ground. While this measurement will not be as accurate as if you were measuring directly on the roof, it will provide you with accurate enough numbers to get the estimate you need. You will still need a ladder, but you will not be on the roof during the entire measurement.

Steps

Method 1 of 3: Roof Measurement Scheme

1 Draw the outline of the roof on a piece of paper. Mark each roof section. You will write your measurements on this diagram to easily calculate the dimensions. If you can see where you have been and what you have already measured, the process will go much faster.
2 Find the area of the triangular section. It's not as difficult as you might think. The area of the triangle is half the width times the length (LxW / 2). Use a tape measure to measure the length of the curtain rod and the length from the center of the curtain rod to the opposite point. Multiply these two numbers and divide by two. Mark this number on the diagram as 1 sq. foot for this section.
3 Define a square foot for rectangular sections. Use a tape measure to determine the length and width of the posts for this section. The multiplication of these two numbers is the square foot that you mark on the diagram.
4 Get the total square feet. Add up the square feet that you define for each section. The sum of these numbers is the total footage of your roof.
5 Calculate the amount of materials you need. Roofing materials are counted by the number of "squares" of the roof, not by square meters. To calculate the roof area, take the total square meters and divide by 100.

Method 2 of 3: Measuring the Roof from the Ground

1 Measure the four sides of the house from the ground using a measuring tape. Remember to add the dimensions of the overhangs to the end measurements of each side. Mark these measurements on the diagram.
2 We get the total square feet. Add up all the square feet you calculated for each section. The sum of these numbers is the total footage of your home, not your roof.
3 Calculate the total number of squares the house is on. To calculate the roof area, take the total square meters and divide by 100.
4 Determine the height of the roof. The slope is how steep the roof is. The slope is calculated by multiplying the roof height by its perspective. Measure from the edge of the roof 12 inches (12 is one division) and see how many inches remain from the roof line (that's the height). Get the slope multiplier in the graph below. Slope Multiplier Graph: 2 in 12 = 1.102, 3 in 12 = 1.134, 4 in 12 = 1.159, 5 in 12 = 1.191, 6 in 12 = 1.230, 7 in 12 = 1.274, 8 in 12 = 1.322, 9 in 12 = 1.375, 10 in 12 = 1.432, 11 in 12 = 1.493, 12 in 12 = 1.554.
5 We get the final calculation of the roof. Take the square measurements you made on the ground and multiply it by the appropriate slope factor. This will be the square on the roof.

Method 3 of 3: Simple Rough Measurement

This is not a very accurate method, but it works well enough for generating an idea of the size of your roof, as well as data that you may not have on hand, such as the size of the garage, etc. This will give a rough but close measurement.

1 Consider the living space of the floor plan. Let's say roughly 2000 sq / m. Consider the living space of the floor plan. Let's say about 2000 sq / m.
2 If your home is one story add 1000 sq / ft. You will get an approximate value. For example, for 2000 sq / ft, you might end up with 3000 sq / ft of roofing, or 30 squares, as most roofers call it that (1 square - 1000 square meters).
3 If you have two floors, then multiply one floor by 1.3. In the case mentioned earlier, your home could be 2,600 sq. meters or 26 squares. Again, you will get an approximate number.