Are gaps between floorboards normal, or do they need repair?

A small seasonal gap in one timber floor can mean something different from an open locking joint in another. I first identify the flooring and installation type, then look at the size, pattern and timing of the gaps. The important question is why the gap appeared, not simply which filler will hide it.

Timber responds to changes in moisture, and some variation can occur as conditions change. A suddenly widening gap, a separated joint or noticeable movement deserves closer attention. I ask whether the room has recently been heated differently, whether furniture or cabinetry has changed, and whether any water problem happened beforehand.

Photograph several gaps in context, then take a close-up with a ruler beside one if convenient. Keep the ruler on the surface rather than pushing it into the joint. A note of when the photo was taken also helps if the gap changes over time. Avoid cleaning liquid collecting inside an open joint.

The solution may involve addressing movement, a joint or a damaged board, rather than filling the visible opening. Where filling is appropriate, the material and expected result need discussing. A rigid cosmetic repair in a moving joint can fail again, and a colour match will not necessarily remain invisible under every light.

If the floor is otherwise usable, send the photos and product details before buying a repair kit. If an edge has lifted enough to catch a foot, keep that area clear and arrange an assessment sooner. I can then explain the repair options and whether the surrounding floor needs attention as part of the same work.