How To Meaure Roof

Remember that the length and width need to be found for the roof not the house so take into account that the roof overhangs the building.

How to meaure roof. L h 2 area calculating an area of a triangle when estimating a roof. Keep in mind that the average size of a roof is 1 700 square feet so your total will likely be 10 higher or lower than this figure. Roughly draw out your roof on a piece of paper. Access one of the rafters then take the measurement this way.

Finding the total roof area. For example what we need on the picture of the roofs below are measurements of all the blue or red lines. Remember it doesn t have to be to scale or look pretty. So if you divide your answer of a product of length times height by two you will get the area of a triangle.

First measure the length and width of each surface on the roof then multiply these values to get the square footage of that surface. Locate the level s 12 inch mark. The pitch is the steepness of the roof. It does have to contain all the straight lines of your roof and an accurate measurement of those lines.

For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. Use a level against the underside of the rafter you re measuring to get the most accurate value. Thus in a simple style house you ll only have to click on the corners. Measuring the length and width of each plane by hand 1.

Draw an overhead view of your roof. Each area on the roof is a single plane which just means it s a surface with a. This can be done by multiplying the length in feet by the width in feet to get the area measurement. Climb a ladder with a notepad a pencil and a measuring tape.

Make sure to document the number of chimneys skylights or other obstructions and include dormers in your measurements. Stretch your tape measure along the walls from end to end. Calculate the pitch of the roof. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches.

Outline the roof at the points that are on the same level or elevation to ensure that you re getting an accurate calculation of your roofing measurements. Measuring your roof from the ground 1. Then determine the area of the roof as if it were flat. The most precise way to find the roof s slope is by measuring it from the underside.

Once the area of the roof s footprint is known the overall roof area can be found by accounting for the pitch of the roof. Stow these items in a shoulder or hip pack while. If you were to click on the peaks it wouldn t give you an accurate reading of your measurement. Find the length and width of the building s exterior walls.

The first step in a free roofing estimate is measuring the roof dimensions. To find the pitch of your roof you ll first. Use a pitch. The length l times the height h of a triangle is twice its area a2.