Q. I had standard 2-inch wide maple flooring put in our house. Now, almost every piece has developed a little cupping with the edges high enough that it feels like a corrugated surface. What is going on?

Q. We manufacture moulding and buy FAS grade lumber that sometimes is cupped edge to edge so much that it gives us problems. Can you please clarify the NHLA Rules, especially paragraphs 14 and 61? Our supplier hides behind these rules. I think we might have improperly graded lumber.

The defect of splitting is the result of drying after the product is made.