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. OSB is a material with favorable mechanical properties that make it particularly suitable for load-bearing applications in construction. It is now more popular than plywood, commanding 66% of the structural panel market. The most common uses are as shething in walls, flooring, and roof decking. For exterior wall applications, panels are available with a radiant-barrier layer pre laminated to one side; this eases installation and increases energy performance of the building envelope. OSB also sees some use in furniture production.