As a side benefit to an addition, we acquired a rather large closet on the second floor...the sub-floor is 2 x 6 tongue-in-groove pine that I decided to not cover or stain, but just sand and apply topcoat. Aesthetic Floors came out and did a spectacular job countersinking nails, puttying holes and gaps, sanding, leveling, and applying topcoat. Everyone says it looks like a dance studio, the floor is so beautiful and smooth! I highly recommend this company. Their workmanship is amazing, they are on time, diligent, pleasant to work with, and take their time to get to know what the customer wants as the end product.