In this YouTube video, the presenter is an experienced owner of a roofing company and highlights the most common mistakes in shingle roofing. They are as follows: 1. Wrong nail pattern or not enough nails If you place nails too high on the shingle, then you will miss the top edge of the shingle below and leave too few nails in that shingle. Video Source Most asphalt shingles need at least 8 nails holding them. When nails are placed too high, the shingle is left with only 4 nails and this can lead to it falling off the roof. 2.…