What do all of those letters even mean?


MDF

Medium-density fibreboard (MDF) is an engineered wood product made by breaking down hardwood or softwood residuals into wood fibres and combining it with wax and a resin binder and forming panels by applying high temperature and pressure. MDF is generally denser than plywood.

LSL

Laminated Strand Lumber (LSL) is the latest engineered wood product to come onto the market. This revolutionary product is used for a broad range of applications including rim board, millwork, and window, door and garage door headers, as well as for many industrial uses. New uses for this product are still evolving, including the use of LSL for vertical members in commercial applications where the framing member heights are long, and the wind loads are substantial.

LVL

Laminated veneer lumber (LVL) is an engineered wood product that uses multiple layers of thin wood assembled with adhesives. It is typically used for headers, beams, rim board, and edge-forming material.


OSB

Oriented strand board (OSB), also known as flakeboard, sterling board and aspenite in British English, is a type of engineered wood similar to particle board, formed by adding adhesives and then compressing layers of wood strands (flakes) in specific orientations.

S4S

The board has been surfaced on both faces (S2S) and received a rip on both edges, resulting in a board with two flat and parallel faces and two flat and parallel edges. These are the types of boards you most commonly purchase.

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