Milling marks, saw blade cuts, knots, etc. have been frequently found in lumber sold in the marketplace for decades now. This is the norm. Such marks are not considered to be imperfections and such boards are not “seconds” or defective. If you wish to have completely knot-free wood used on your job, then you must specify “architectural grade” materials in the Estimate. As you would expect, such materials come with a premium price tag.
Posted in: Siding and Trim Replacement and Repair