A pergola can add form and function to outdoor living spaces and define an outdoor room. The columns signify the corners and walls of the room, while the beams & joists create a roof overhead. It will denote the main room for gathered activates while creating a visual point of convergence and architectural interest. These elements of the form are also main elements of the pergolas function to define a space.
Style is the element of the form that will define the character of the outdoor room. White Palladian columns with clean white beams and joists will create a formal space when situated in gardens of strong architectural and organized plantings such as boxwood hedges. Rough timber frame posts, beams and joists produce an informal feel to the room and blend seamlessly with loose informal planting and a more organic garden structure. The materials used for the pergola construction will influence the resulting style but should also be considered with respect to long term maintenance of the structure. Cedar or other timbers will require some sealing or oiling over time.
There are a variety of companies that produce synthetic pergolas with vinyl, fiberglass and polycarbonates. The higher quality of these products are almost indistinguishable from painted wood, though the lower quality clearly have a plastic feel to them. These synthetic products tend to work best when a more formal style is desired. Shade can be an important function of the pergola. The pergola alone may not offer enough protection from peak summer sun.
Vines grown on a pergola create additional shading and aesthetic interests. Another shade option is a retractable canopy that is set on tracks in the beam structure. These can be either mechanical or manual and provide a much lower maintenance option for shade when compared to the vines. Retractable sun screens can even be fitted between posts to provide protection from the sun when it is lower on the horizon. A pergola can create architectural interest, define and outdoor living space, provide retreat from the elements, and give structure for fruiting or flowering vines. It will contribute both form and function to your garden and outdoor living space.