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Pergola Site Preparation
Site preparation is one of the most important parts of planning a project. There is no simple "one size fits all" answer since everyone’s needs, plans, and locations are different, but here are some common guidelines to follow when preparing for your new structure.
 
Base
We strongly recommend a hard, compact base for your structure. The base will provide support and allow for proper drainage. The materials used for a foundation are almost always one of the following: compacted gravel (if a deck is included), patio stones, or a concrete pad. Sometimes piers are also used if the structure must be elevated off of the ground.
 
Gravel: Patio Stones: Concrete Pad:
2B Crushed Limestone Gravel Large Concrete Patio Stones Freshly Poured Concrete
Gravel Base with Pine Border Patio Base with Stones/Pavers Solid Concrete Pad/Slab
 
Gravel:   This option is only recommended for structures that include a deck. Loose stones and gravel are easier to level and provide enough support, but must be contained. Gravel stones are often less expensive than solid materials such as concrete, flagstone or brick, but they are also less permanent.

Patio Stones:   If the area is level, stone pavers are a viable option. These come in different sizes such as 8" x 16", 12" x 12", or larger, and come in different thicknesses and depths. If your structure includes a deck, be sure to rest the floor on the block so that it is supported at each post, and in the middle. Additional supports should be added as needed so that there is no span greater than 4-5 feet. On structures with no deck the posts can be embedded in concrete footers in the ground beneath the patio stones, or the posts can be attached to the stones, although without proper planning this may crack the stone pavers in certain situations.

Concrete Pad:   A concrete pad is the most long-lasting option, and the most structurally supportive if done correctly. It must be level and plumb. A sloping pad means a leaning structure, which will put extra stress on joints. Concrete pads can be made larger than the structures they are supporting. The size and style of the structure, your location, and local codes can influence the design process (for example, footers may be required). Please talk to one of our Project Advisors before pouring concrete.

Once you have selected the base material, it must be leveled within 1-2 inches from side to side.
 
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