How to Stain an Uneven Floor

Sand the floor with 100-grit sanding blocks. Sand along the grain until the floor is smooth and all scratches and nicks are gone.

Sand the floor with a 240-grit sanding block until the floor is smooth and soft.

Sweep the sawdust from the floor. Soak a sponge in clear water and wring it out as much as possible. Rub the cloth over the floor to remove the sawdust. Rinse the sponge and repeat the process until the entire floor is clean and free from sawdust.

Dip a paintbrush into the stain and brush it on the floor, working in 2-foot sections. Let the stain sit for at least 4 minutes or longer if you want the color to be richer. Wipe a cloth into any areas of the floor that are uneven and that pool with stain. This is essential to ensure the floor isn't splotchy.

Wipe the floor with rags to remove the stain. Wipe in the same order that you applied the stain -- and pay special attention to any areas that pooled with stain. Use a new rag once one becomes stain-covered.

Drag a dry brush over any areas on the uneven floor that have stain pooling on them.

Repeat the exact same process with the rest of the sections of the floor. Ensure you leave the stain on the floor for the same amount of time -- for each section -- to achieve an even result.

Let the stain dry completely overnight.

Brush sanding sealer directly onto the floor.