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- **How much gap under the door is recommended?**

# How much gap under the door is recommended?

- [llms.md](https://www.pelicorfloor.com/faq/how-much-gap-under-the-door-is-recommended/index.md)

There will be a gap between the interior door and the wooden floor. How much gap should be left? The intuitive thought is: the smaller, the better. But how small is small enough? Generally, the door gap can be kept within 1 cm. Of course, it can be smaller, even down to 3–5 mm. However, the recommended minimum is at least 5 mm. Why? Because wooden flooring expands, and interior doors may also swell or warp. Leaving a gap of a certain size is safer for long‑term use. A slightly larger gap can also prevent sand or grit from getting stuck, which could scratch the floor when the door opens. If you prefer a very small gap, make sure the original subfloor is level enough; otherwise, the door may close but then be impossible to open (opening it would hit the wooden floor).

## Other Flooring FAQ

- [Does wooden flooring need to be raised to resist moisture?](https://www.pelicorfloor.com/faq/does-wooden-flooring-need-to-be-raised-to-resist-moisture/)
- [How much gap under the door is recommended?](https://www.pelicorfloor.com/faq/how-much-gap-under-the-door-is-recommended/)

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May 30, 2026

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