When does a height difference in wooden flooring require repair?

A height difference in wooden flooring requires repair when the difference exceeds 5 mm because such a measurement indicates a significant level of unevenness that could potentially cause safety hazards. Uneven flooring can lead to tripping or falling, especially in high-traffic areas or where mobility is essential. A 5 mm threshold is a standard guideline that implies that any greater deviation in height should be addressed to ensure proper function and safety of the flooring. This standard helps to maintain a level and safe surface for movement, which is particularly important in environments frequented by people, such as homes and commercial spaces.