DuraVent DuraTech 5-8 - Manual (Page 5)

ATTIC
INSULATION
SHIELD
FIRESTOP
RADIATION
SHIELD
(INSIDE)
ENCLOSURE
MUST HAVE 2
INCHES OF
CLEARANCE
BETWEEN
CHIMNEY AND
WALL
FIRST
FLOOR
OCCUPIED
SECOND
FLOOR
ATTIC /
UNOCCUPIED
SPACE
5
CHIMNEY HEIGHT
The National Fire Protection Association
Standard #211 states: “Chimneys shall extend
at least three feet above the highest point
where it passes through the roof of a building,
and at least two feet higher than any portion
of a building within ten feet.” (Fig.1) DuraTech
Chimney may be installed up to 60 feet high. If
the chimney extends more than 5 feet above
the roof, an Extended Roof Bracket must be
used (see page 12). Due to the overlap of the
joints, subtract 1-1/4 inches from each Chimney
Section’s height to calculate installed height.
CHIMNEY PLACEMENT
When deciding the location of your chimney,
try to avoid modifications to roof beams and
other structural components of the building.
CHIMNEY ENCLOSURE REQUIRE-
MENTS
Through Rooms: Interior chimneys shall be
enclosed where they extend through closets,
storage areas, occupied spaces, or anyplace
where the surface of the chimney could be
contacted by persons or combustible materials.
Maintain at least a 2-inch air space between
the outer wall of the chimney and the enclosure
(Fig.2).
Multi-Story: Consult local building codes for
requirements in your area. In the U.S., the
National Fire Protection Association Standard
#211 states: “Factory-built chimneys that
pass through floors of buildings requiring the
protection of vertical openings shall be enclosed
with approved walls having a fire resistance
rating of not less than one hour when such
chimneys are located in a building less than
4 stories in height, and not less than 2 hours
when such chimneys are located in a building
more than 4 stories in height.” In Canada,
Figure 1
Figure 2
2 FT MIN ABOVE HIGHEST
POINT OF ROOF WITHIN
10 FT
10 FT
3 FT MIN
ABOVE
ROOF
except in single-family and two-family dwellings,
chimneys which extend through another story
must have an enclosure with a fire resistance
rating equal to or greater than that of the floor or
SUPPORT
BOX