Feb 07, 2013 · I am nearing completion of the new deck (write up to follow) and on the weekend I installed the posts for our roof/pergola (so I could deck around them).
This step by step diy project is about 20x20 pergola plans. I have designed this square pergola with a 20'x20' base and a 22'x22' roof. This is a large project, so it requires a significant investment and also many labor hours.
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The next step of the pergola project is to layout the posts. Use batter boards and string to layout the location of the posts. Apply the 3-4-5 rule to every corner and then measure the diagonals to make sure they are perfectly equal.