What is the maximum clearance between the door and sill?

The maximum clearance between the door and sill is typically determined by standard building codes and practices, which dictate how much space should ideally exist to ensure proper function and aesthetics while accommodating potential expansion and contraction of materials due to environmental factors.

In many residential building codes, a clearance of 3/8 inch is commonly specified. This clearance allows for the door to swing freely without scraping against the sill while also providing enough room to manage any potential issues with flooring changes or settling of the structure. A margin of 3/8 inch balances functionality with practical considerations of manufacturing tolerances and variances that can occur during the installation process.

Clearances that are too small may lead to binding, while those that are excessively large can result in drafts or insect entry. Therefore, the standard of 3/8 inch reflects a well-considered compromise in the design parameters for door installations.