In general, hardwood floor installation takes about 1 to 2 days. The most common method to install hardwood flooring is to nail down and glue the boards. This is done by nailing the hardwood floor directly to the subfloor with the help of a hammer and Pneumatic nail gun. The entire installation process timeline depends on whether or not the previous floor needs to be removed, the size of the room it is being installed, the number of installers, and type of wood. For more information about the process of hardwood floor installation check out this in-depth article.