How to Fill Knots on Wood September 12, 2016 by Janice 8 Comments Like it? Share it!Today I want to share with my new adventure and show you how to fill knots on wood. You see, I have knotty alder cabinetry throughout my entire house. Our house was built in 2001 and well…need I say more? I was ready for a change. Like it? Share it!