Final answer:
OSB doesn't delaminate easily because it is made with waterproof or water-resistant adhesives that bond wood strands together during heat and pressure treatment. The cross-orientation of the layers adds strength and stability, and some OSB products have an additional sealant to prevent moisture penetration.
Step-by-step explanation:
Oriented Strand Board (OSB) is a type of engineered wood similar to particleboard, formed by adding adhesives and then compressing layers of wood strands (flakes) in specific orientations. OSB panels have several attributes that contribute to their resistance to delamination. The wood strands are coated with waterproof or water-resistant adhesives that cure under heat and pressure during manufacturing, creating a very strong bond that holds the strands together.
Additionally, the cross-oriented layers in OSB provide dimensional stability and strength. The alternate layering of strands distributes loads and stresses evenly across the panels, which reduces the likelihood of delamination. Some types of OSB also have a sealant applied to them which provides additional moisture resistance. These manufacturing processes make OSB a durable and reliable material for various construction applications, with a reduced risk of delamination when compared to other wood products.