It's hard to appreciate the beauty of this outdoor kitchen and pergola from the photo. Both the building and pergola are built using western red cedar. The V-groove siding on exterior is set vertically rather than horizontally, the more common application. Western red cedar is a great wood for use outdoors. It takes very little treatment and will silver with age. The folding window from Shenandoah Sash & Door is a specially-designed accordion window for this type of application.