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Friday, June 15, 2012

Wood pergola materials vary by price and appearance

Choosing which material to use to build your pergola is dependent on many factors. Budget, of course, is usually at the top  Prices can be so different even amongst the different timber varieties. For instance, in the drawing above there are 24 pieces of wood (4 posts, 8 knee braces, 4 beams, 8 rafters).  Pressure treated pine would total around $400. Cedar would total $1,000 and redwood could break any budget unless you live in area where it is readily available, then it could cost less than cedar! A similar vinyl pergola kit would run well over $1,000. So if you are determined to spend less than $1,000 is the pressure treated pine a valid option as far as durability and appearance compared to cedar or redwood?

Pressure treated pine definitely stands up to the durability test. As long as you make sure any ends you may have to cut to create your desired pergola design are also properly treated before final construction, then this very hard, solid wood will last for decades. We know of a properly drained set of pressure treated pine posts buried into concrete casings in the ground in an area of the country where the ground freezes that were still in fantastic shape after over twenty years. The old posts had to be removed to make room for a newer, larger pergola and even the timber that was in the ground was free of moisture damage.

The bigger difference between the materials is in their appearance. A pergola built from pressure treated pine will definitely look more rustic or natural. There could easily be visible knots in the wood. Now, the pieces can be either stained to a darker hue or painted, but that ads an extra level of ongoing maintenance as weather and wind will wear down the exterior layer and need freshening up. Cedar & redwood look beautiful and elegant on their own without any staining or painting needed. Natural oils protect  just as well as pressure treating.  If you are really determined to have the look of cedar or redwood, then shop around lumberyards for sales to try to bring the material cost down a little more.

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