There are two layers of wooden shingles, two layers of regular shingles and a lot of asphalt on our roof. This is the second day the roofers have been here. They are working pretty hard so I hope it will be done by the end of the week. But, our roof is a bit steep so I'm sure that is adding to the difficulty.
I have to admit I was a bit shocked when I saw that they were using axes to get through the layers.