Lumber yards will have all the wood that you will need for your construction project. If you need logs for log homes, pressure treated wood, 2 by 4's and many other types of wood and logs. Specialty sizes of lumber can be ordered from lumber yards. Lumber yards use equipment such as planers and circular saws to cut the large logs into the correct size. Lumber Yards take in wood from wood mills and sell the finished product which is most commonly used in construction, building and remodeling projects. A lumber yard will have many types of wood for your project from pine to mahogany to hemlock. Different types of wood are good for different projects. Cedar is a common exterior siding material. Pine is used commonly for framing and hard woods like mahogany and hemlock are used for decks, interior finish and flooring.