Levels of Quality, Sizes, Edges, and Joining Systems. Shaw classifies its floors as Good, Better, Best, and Superior. Most floors fall in the Better or Best categories, with some floors falling into both categories at once (doubling the wear layer thickness bumps a product up to the Best level).
If your shelf projects 1 1/2 inches or less, there must be at least six inches between the top of the fireplace and the mantel. Any parts of the mantel that project more than 1 1/2 inches must be at least 12 inches from the top of the fireplace.
1 The top of the flue opening should be at least 3 Ft (0.92 m) above any roof surface. ( 2 The vertical green arrow in the sketch) I.e. a vertical line drawn along the up-roof side of the chimney, from the roof surface to the top of the chimney flue opening shall be at least 3 Ft in height.3  This is for masonry chimneys.ake a look at the chimney height clearance requirements sketch at the top of this page. The only confusing detail in that sketch is that the ten foot chimney height rule horizontal line was shown as drawn mid way down the chimney-really that line is drawn from the chimney TOP to the nearest roof surface.