How Do Measure A Roof For Shingles

Outside of the u s a degree angle is typically used.

How do measure a roof for shingles. Required measurements include the following. If the planes aren t rectangles this may be complicated. 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. This will be done once it s time to determine the number of shingles you need.

To do this you need to note that one tab will be equal to 1 foot. First you must measure the length and width of each plane of the roof including dormers. To measure for roofing shingles start by calculating the area of each plane or section of the roof. For each individual section of roof that you measured you will need to multiply the length by the width which will give you the square footage of that section.

To calculate a rough estimate follow these steps. Divide the roof into manageable sections. Next to calculate the square footage of each rectangular plane multiply the length by the width. 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.

If the existing shingles are standard 3 tab shingles you can get this measurement by taking note of the number of tabs along the eaves and ridges then determine the length in feet. Then determine the area of the roof as if it were flat. So if you divide your answer of a product of length times height by two you will get the area of a triangle. The length l times the height h of a triangle is twice its area a2.

The last step in measuring your roof for shingles is possibly the simplest because all it entails is using your measurements to calculate your roof s square footage. Climb onto your roof and measure each section by its height and width. Write out each measurement exactly as it appeared on your tape measure to the nearest 1 2 inch 1 3 cm. Calculate the square.

Then each measurement is recorded on the diagram applicable to that roof surface. Start by measuring the length and width of the roof in feet as you re standing on the ground. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. Rounding before you begin multiplying and adding may throw off the accuracy of your final estimate.

Next divide your total area by 100 to calculate the number of roofing squares you ll need to buy. How to measure a roof for shingles step by step the process of accurately measuring a roof involves first making a diagram of the roof to show the basic shapes of each roof plain and how they relate to one another. This doesn t have to be an exact sketch but. How to measure a roof for shingles draw a rough layout of your roof.

Measure and record your findings. L 30 feet h 12 feet 30 12 2 180 square feet.