How to Build a Free Standing Pergola

Video Transcript

Construct a Hurricane-resistant Pergola in Your Back Yard to Improve a Bare Corner and Add a Shaded Sitting Area

Dress up a plain corner of your backyard with a free-standing pergola that is visually appealing and offers a shaded sitting area as well. Make it large enough to accommodate lawn furniture or even a hot tub along with hanging flower baskets and climbing vines. Construct it according to building codes and make it stout enough to withstand hurricane winds!

Check for Gas, Water, and Electric Lines before Locating Posts
Step 1

Check for Gas, Water, and Electric Lines before Locating Posts

Determine where to sink the pergola's six support posts after checking for gas, water, or electric lines. Drive a stake and string at the first corner. The six-by-six posts must be aligned perfectly straight and parallel to each other.

Align a Back Corner Stake with String and Triangle
Step 2

Align a Back Corner Stake with String and Triangle

Position a right-triangle along a two-by-two at the pergola's front edge. Stretch string to the back corner, ensuring that the angle at the front stake is 90 degrees. Align a stake at the back corner. This pergola/arbor design is rectilinear.

Tie Markers along the String to Mark Pergola Post Positions
Step 3

Tie Markers along the String to Mark Pergola Post Positions

Tie markers along the string for the middle and back post positions on that side of the arbor. Equally space them with a tape measure. Repeat for three post positions on the other side. Drive a stake at each marker.

Mark Post Holes with Powdered Chalk and a Bottomless Bucket
Step 4

Mark Post Holes with Powdered Chalk and a Bottomless Bucket

Center a bottomless bucket on each of the six stakes and sprinkle powdered chalk around the outside perimeter to mark a posthole digging line. Carefully remove the stakes without disturbing the digging line for each posthole.

Dig Holes at Least 3-Feet Deep with a Posthole Digger
Step 5

Dig Holes at Least 3-Feet Deep with a Posthole Digger

Dig six holes within the chalk lines with a posthole digger, making them slightly deeper than 3 feet. Building codes in this hurricane-prone area require that holes be at least 3-feet deep to keep the posts stable in high winds.

Set Posts in the Holes and Ensure They Are Plumb
Step 6

Set Posts in the Holes and Ensure They Are Plumb

Add 2-3 inches of crushed rock to holes to promote drainage and prevent wood rot. Drop six-by-six posts into holes. Ensure pergola posts are plumb with a post level. Clamp temporary braces to stakes and posts to hold them vertical.