Knots in a board add character and a rustic style to your space. That's undeniable. But what flooring companies don't tell you, is that these knots come with a price.
The knots in your floor are formed whenever a tree loses a branch and new growth covers the area. And as the tree ages, more and more of the resultant lumber has the potential to be knot free (or minimally affected) because the diameter of the trunk increases over time. This knot free lumber is considered to be higher quality and will inherently cost more for a wood manufacturer, leading to the romanticization of knots as part of a rustic style.
However, these knots affect the dimensional stability of your floor--or in different terms, the likelihood the your floor will behave well over time in your home. These areas behave differently from the rest of the wood grain in your floor, and will react in adverse ways to moisture changes in the air. This could lead to warping or cracking in an otherwise sound board.
At Steller we strive to ensure that the lumber we bring in is lumber you'll be able to enjoy for a long time to come, so we're sensitive to this issue. And while there are some beautiful grain patterns in the lumber we work with, we avoid knots as much as possible!