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2/8/2012
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Our Products: Fireplaces > 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"
fireplace mantel veritical clearances
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:
fireplace mantel horizontal clearnaces
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"
fireplace mantel leg clearances
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).
fireplace mantel flat trim clearances