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Our Products: Fireplaces > Info Links > Fireplace Mantel Clearances

Minimum Mantel Vertical Clearances
There are minimums for clearances for combustible mantel height above a fireplace. NFPA codes for minimum clearances are as follows:
Ref.	Mantel Shelf or Breast Plate Depth	Ref.	Mantel from Top of Combustion Chamber
V	10"	A	19"
W	8"	B	17"
X	6"	C	15"
Y	4"	D	13"
Z	2"	E	11"

Minimum Mantel Horizontal Clearances
Additionally, there are minimums for clearances for combustible mantel width beside a fireplace. NFPA codes for minimum clearances are as follows:

Ref.	Mantel Leg Depth	Ref.	Mantel Leg from Side of Opening
F	10"	K	11.5"
G	8"	L	9.5"
H	6"	M	7.5"
I	4"	N	5.5"
J	2"	O	3.5"

Minimum Mantel Horizontal Clearances - Flat Trim
If the combustible required (i.e., trim) projects from the facing less than 1.5 inches (A, below), the closest to the fireplace opening it can start if 6 inches (B, below). If the combustible required (i.e., trim) projects from the facing more than 1.5 inches (A, below), the closest to the fireplace opening it can start is 12 inches (C, below).

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