An asphaltic composition shingled roof is not as hard to install as you might think, but it's always better to call a licensed roof installer if you're unsure. Luckily, the Youtube video "How to Install Roof Shingles" shows a demonstration of a tiny roof installation in a class, so you can understand what happens. Let's find out more!
The first part of installing this kind of roof is to set up the drip edge, which needs to be placed before the felt to prevent water from gathering in the corners and trickling down to the roof toward the inside of the house. You need to start placing it from the eve and follow the natural slope of the roof.
Once you get to the top, you can make a small cut in the drip edge, which will allow it to bend in such a way that you can keep going without getting another panel.
Once the entire drip edge is placed, you can add the felt, which you should also begin from the eve of the roof. Next, you need to install the starter edge, which goes through the entire perimeter of the roof, but it should be a few inches further than the drip edge.
You can watch the rest of the video for more details about being a roof installer..