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.
A chimney that is too low to the roof (does not extend 3 feet above the roof line) is more likely to cause a roof fire from flying sparks and less likely to draw well. As a rule, 15 feet should be the minimum chimney height unless you have an extremely small firebox or other unique situation.