What is the purpose of a shim in construction?

The purpose of a shim in construction is primarily to fill small gaps or level structures. Shims are thin and often wedge-shaped pieces of material used to provide support or create a level surface where there may be slight discrepancies in height or alignment. By inserting shims, workers can ensure that surfaces are even, which is crucial for structural integrity and for the proper functioning of various construction elements, including doors, windows, and built-up components.

When used correctly, shims allow for precision in assembly and can accommodate minor variations in dimensions that might otherwise lead to instability or misalignment in structures. This capability to adjust and fill gaps makes shims an essential tool in both temporary and permanent installations.