When installing pavers, the final surface tolerance from grade elevations shall not deviate more than:

The correct tolerance for the final surface of installed pavers is crucial for achieving proper drainage, structural integrity, and aesthetic appeal. The specification of a tolerance of plus or minus 3/8 inches over a 10-foot straight-edge ensures that the paver surface remains relatively uniform and smooth, allowing for effective water runoff and reducing the likelihood of uneven settling or shifting over time.

This tolerance helps in preventing water pooling and facilitates maintenance by ensuring that all pavers are flush with one another, which is important for both safety and functionality. A tighter tolerance like this also plays a critical role in enhancing the visual consistency of the paving surface, thereby making the installation more attractive.

A tolerance that is too loose could lead to complications such as water drainage issues and increased wear on the surface as it can create trip hazards and unlevel areas. Thus, maintaining a standard of plus or minus 3/8 inch ensures a balance between practical drainage needs and aesthetic quality.