What is the most troublesome condition encountered when installing strip or plank flooring?

The most troublesome condition encountered when installing strip or plank flooring is "out of flat sub-floor." This condition can lead to a host of installation challenges, as a sub-floor that is not level can cause uneven flooring, which impacts both the aesthetics and functionality of the final surface. When the sub-floor is uneven, it can create gaps, squeaks, or even structural issues in the flooring material itself, leading to potential damage or a shorter lifespan of the installation.

Moreover, ensuring a flat sub-floor is critical because many types of strip or plank flooring require a precise, stable foundation for proper installation. If the sub-floor surface is not adequately prepared and made flat, it can lead to complications during the installation process, such as difficulty in aligning the boards and ensuring they sit flush against one another. This can ultimately impact the overall performance and appearance of the flooring, making it a primary concern for contractors and installers.