Does humidity play a part for engineered oak floors?

The relative humidity is the quantity of water proportionately present in the air. You need a hygrometer to measure the humidity. Most weather stations have a hygrometer. Too high humidity can cause mould, vermin… This can also have an influence on wooden floors. 

The right relative humidity is between 40% & 55%. So it is certainly important to install the wooden floor when the humidity is between these values, and it is also important to keep an eye on this percentage after installation. A different percentage could cause the wooden floor to shrink or expand.

If the relative humidity is too low, the wood will repel moisture and shrink. This can result in irreparable cracks. If the air humidity is too high, the wood will absorb moisture so the planks will expand and lift.

Humidifiers with built-in hygrostat can be used to constantly measure the relative humidity in a space. 

This appliance measures the humidity in the air and will humidify the space if required by means of cold water technology.

It is important to remember that wood is a natural product with the possibility of deformation, cracks or open gaps in the joints and this must be tolerated.