What is a common attribute of a flooring installation over concrete?

A common attribute of flooring installation over concrete is that it usually "floats." This means that the flooring material is not directly attached to the concrete substrate; instead, it rests on top, often over a layer of underlayment. Floating floors are designed to expand and contract without being restricted by the concrete below, which can help prevent damage due to moisture and temperature fluctuations. Floating installations can be found in various flooring types, including laminate and engineered hardwood. This method allows for easier installation and removal while also providing a cushioning effect and some sound insulation due to the layer beneath it.

In contrast, some installations may require heating, while others need to be nailed down or might utilize padding, but these are not universally applicable to all flooring types laid over concrete. Therefore, the characteristic of a floating installation is what makes it stand out in this context.