Of all the materials used for wood pergolas, western red cedar is the perfect material for the following reasons: it is very durable naturally and is a type of wood that is grown sustainably. It needs no chemical treatment to keep away the pests and so is eco-friendly. It is resistant to decay naturally. It also has a fine straight grain and is so easy to cute and does not split easily. Apart from bring light-weight, which makes it easy to work with, it is also free from resin and pitch. Therefore, it can be painted or stained in any color. More importantly, it blends excellently with the surroundings and gives a pleasing aroma.