Standard fireplace mantel height. Many models are available in 2 sizes those that fit fireplaces roughly 36 wide or less and those that fit fireplaces 42 wide. Your fireplace may fit this dimension or it might be on the shorter or taller end of the spectrum when it comes to mantel height above fireplace. Again proper height is relatively subjective to your fireplace but average or standard fireplace mantel height construction is around 54 above the hearths floor.
The average height for a fireplace mantle varies by personal preference as well as locality. As the mantel opening width increases so does the mantel shelf length and mantel body width. Six inches of clearance on either side of the fireplace opening is also standard.
Minimum mantel vertical clearances. A standard mantel is at least 12 inches above the height of the fireplace if the fireplace is designed to burn wood. The nfpa states that mantel depth is directly related to the required height clearance between the top of the fire box and the bottom of the mantel.
The proper height of a fireplace mantel depends on the height of the hearth the size of the fireplaces fire box and the requirements of the local building codes. When it comes to selecting a fireplace mantel that coordinates in size and shape with the overall room design there are several material choices including wood stone marble faux finish and pre constructed surrounds.