DuraVent DuraTech 5-8 - Manual (Page 20)

20
bottom of the Storm Collar and the Chase Top
Flashing.
METHOD 4: MASONRY FIREPLACE
INSTALLATIONS
1. Determine Chimney Size: Use Fig.30 to
determine the correct diameter chimney for your
fireplace.
2. Mount Anchor Plate: Chimneys for masonry
fireplaces begin with an Anchor Plate. Make
sure the surface of the masonry chimney has
a level surface on which to attach the Anchor
Plate. If the top of the masonry does not have
a level surface, then you will need to modify the
masonry accordingly. Follow the requirements
of your local building department for connecting
factory-built chimneys to masonry fireboxes or
masonry chimneys. Center the Anchor Plate
over the masonry flue opening, and seal the
Figure 28
Figure 29
ALLOW MIN OF 2 INCHES
AIR SPACE ON ALL SIDES
2 INCHES MIN
2 INCHES MIN
ALLOW 1 INCH AIR
GAP BETWEEN STORM
COLLAR AND CHASE
TOP FLASHING
1/2 INCH AIR SPACE
ESTABLISHED BY
SPACERS
6 INCH MIN CLEARANCE
BETWEEN BOTTOM OF
CAP AND CHASE TOP
FLASHING
1/4 INCH
AIR
SPACE
CHIMNEY CAP STORM COLLAR
CHASE TOP
FLASHING
CHIMNEY
SECTIONS
SPACER
1/2 INCH
FRAMED CHASE
ENCLOSURE
1/4 INCH