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Wood fireplace mantel dimensions.
Select from our standard sizes 4 5 6 and 7 of fireplace mantel shelves.
This allows room for stockings during the holidays.
6x12 textured mantel mantel height.
The return dimension g is calculated by adding a minimum of 1 4 inch to the thickness of the facing material protrusion.
Most housing codes and the national fire protection agency nfpa state that the bottom of the mantel must be at least 12 away from the top of the fireplace box.
For wood mantels the opening width opening height and return depth can be adjusted to accommodate different fireplace opening and fireplace surround facing material dimensions.
If you are building the fireplace mantel over 3 4 inch thick marble you should specify a return depth of at least g 1 inch.
As the mantel opening width increases so does the mantel shelf length and mantel body width.