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A pergola needs to be anchored, and typically, concrete is the best anchor option. Pergolas should be anchored to a concrete slab or concrete footings, and this is commonly required by municipal building codes. When applying for a permit to install a pergola, be sure to check the anchoring requirements as well.

There are a few differences between pergolas and gazebos. Both structures provide shade, but pergolas are more minimalistic, with four posts and a terraced roof. Gazebos usually have an elevated floor and are typically shaped like a polygon with six or eight open-air sides and two small sets of steps leading up to the platform. Gazebos also tend to have pointed, shingled roofs and ornate accents. If you want a structure that keeps out water on rainy days, a gazebo may be a better option—though you can purchase an awning to go over your pergola to keep out water.

Turnbuckle weight loads vary depending on their size. Smaller 1/4-inch turnbuckles have a weight capacity of about 500 pounds. A 3/8-inch diameter turnbuckle, which is strong enough to handle most residential fence gates, can handle a working load of 1,200 pounds. Larger 1/2-inch diameter models have a limit of 4,000 pounds.

It’s best to opt for a lightweight roof, as a heavy roof adds a lot of weight and pressure to the support posts and hardware and destabilizes the structure. Vinyl is a good, lightweight option, as is a nice open trellis, louvered aluminum or vinyl slats, or fabric panels. Clear polycarbonate is another great option that offers seamless shelter and additional UV protection without completely obscuring the sunshine. You can also choose retractable coverings or an awning that you only use in wet weather or when you need additional shade.