If you do not, chances are, you aren’t an expert in the world of home repair. But there’s no reason you cannot be unless you’ve been living under one roof for very long. If so, then it probably means that you’ve either never tried your skills on a real roof, or you just plain don’t know how to calculate roofing squares (or roof slopes). Either of which is fine by me.
When learning how to calculate roofing squares, I’d suggest starting with the most common type of roofing used on homes: metal roofing. Metal roofing is pretty straight forward in its calculation as well. Of course, you’ll need to know the square footage, the number of sides, the depth of each individual slab, and the angle the slabs are pitched at, but other than that, everything else is relatively easy.
With that done, let’s talk about installing a new roof. Asphalt shingles are obviously not as durable as metal roofing, and I wouldn’t recommend using them unless you’re installing a brand-new roof. Instead, I’d suggest using metal roofing. The key reason for this is that asphalt shingles are much more heavy duty and will provide better resistance to the elements.
Now, in order to learn how to calculate square footage properly, you have to get a tape measure and a pencil. Draw a line around each individual piece of the metal roofing, then put one end of the tape measure just outside the first line, and the other end inside the line. This way, when you apply roll roofing to your project, you know exactly how much material you’ll need.
The next step in how to calculate roofing squares is to draw a horizontal line inside of the area you’ve drawn, which will be the base of your roof. This will give you the height of the shingles you will use. Next, figure out how many layers you’ll need – four to six, depending on how deep you want your new roof to be. Lastly, remember to take the corners into account, as you need to know the distance from the corners to the rest of the shingles.
If you want to know how to calculate roofing squares correctly, the final step in how to calculate roofing squares is to draw a floor plan. This is where you’ll add in your asphalt shingles, and figure out how long they should be. Be sure to include all of the measurements for your rafters as well, as they will make up a quarter of the square footage. Then, write down the square footage you have so that you have enough room to work. Use a tape measure to measure how far along your roof, and then take the square footage you need from there. Finally, sum the square footage together to get your total square footage.