After last summer's washout we can't complain about not getting enough sun this year, but we still don't want to sit out in it for too long or have the kids play unprotected.
A shade sail can be a good solution over an outdoor dining area or a kids' play area.
Step 1: Mark the position of the posts with spray paint. Decide how tall your posts need to be. In this case the sail was going to cover our trampoline area, so the posts needed to be tall enough to account for the highest of jumps.
Remember to add another metre for the section of post that will be buried.