*3.1.3 MDF*

Medium-density fiberboard, commonly known as MDF, is made by combining sawdust, wood chips, or even organic fiber and pressing them with high pressure. MDF, as a multi-layer board, is widely used as a building material in residential and commercial projects. Perhaps the only disadvantage of MDF is that it is very dense and therefore weighs significantly compared to plywood and chipboard.

Undoubtedly, MDF is one of the most widely used woods used in making construction materials and wooden items. They use MDF to make cabinets, furniture, wall panels, decorative items, and doors; Because MDF is heat and sound insulation. MDF is also used in acoustic enclosures such as speakers or bass speakers. For people who work with MDF, the only problem they get from it is its high weight. Usually, the use of MDF in floor products, such as laminate and parquet floors, is not practical and its use is completely wrong. In the following, we will discuss some points about the use, advantages, and disadvantages of MDF [28]. An example of MDF wood is shown in **Figure 4**.
