DuraVent DuraTech Shroud User Manual

Installation Instructions

DuraTech 5" - 24"
Chimney Shroud

DuraTech Shroud

A MAJOR CAUSE OF CHIMNEY RELATED FIRES IS FAILURE

TO MAINTAIN REQUIRED CLEARANCES (AIR SPACES) TO

COMBUSTIBLE MATERIALS. IT IS OF THE UTMOST IMPORTANCE

THAT THIS CHIMNEY BE INSTALLED ONLY IN
ACCORDANCE WITH THESE INSTRUCTIONS.

NOTE:
Read through all these instructions
before beginning your installation. Failure
toinstall the chimney as described in these
instructions will void the manufacturer’s
warranty and may have an effect on your
homeowner insurance and UL listing
status. Refer to the DuraTech Chimney
Installation Instructions for complete details
on installing the DuraTech Chimney system.
Keep these instructions for future use.

Dear Customer, Installer, or End User:

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APPLICATION AND LISTING

As specied in these instructions, Shrouds are
approved for use with DuraTech Chimney
(5”-24” diameter). A Shroud built and installed
in compliance with these instructions is UL
listed for use with DuraTech chimney (listing
number MH7399).

INSTALLATION NOTES

Practice good workmanship. Exercise
extreme caution when working on roofs. Be
sure to wear appropriate safety gear and
clothing as needed. Refer to the DuraTech
Chimney Installation Instructions for further
safety details.

MH7399

SHROUD REQUIREMENTS

Shrouds can either be eld-fabricated or
factory-fabricated, but they must meet the
requirements as specied in these instructions.
Shrouds must be constructed of a minimum
24 gauge (.024”) stainless steel, aluminized
steel, galvanized steel, or copper. Other
materials may also be used, such as brick,
mortar, stucco, stone, etc., provided they
are completely non-combustible. Check with
your local building code authorities for any
additional shroud requirements. Shrouds
must be able to be removed to allow chimney
access to properly clean the chimney.
DuraTech installations which include the use
of a shroud must comply with the following
requirements (Figure 1):

ALLOW A 1-INCH AIR GAP BETWEEN STORM
COLLAR AND CHASE TOP FLASHING

1/2” AIR SPACE ESTABLISHED
BY SPACERS

▪ DuraTech chimney must maintain at least 2”
clearance from combustible materials.
▪ The chase enclosure must be ventilated.
▪ The Chase Top Flashing or eld-fabricated
chase pan must be used. Fieldfabricated
chase pans are acceptable if they meet these
requirements:
▪ Material must be 24 gauge (.024”)
Galvanized steel or equivalent.
▪ Chase pan must have opening 3”
larger than outside diameter of
chimney pipe with at least a 1/2”
upturned ange/collar.
▪ Chase pan must overhang chase
by 1/2” per side for proper air ow.
▪ Chase pan must have a 1” down
urned outside edge (weather
protection).

CHIMNEY CAP

STORM COLLAR

5”-16” DIAMETER

CHIMNEY MUST

EXTEND AT LEAST 3-

INCHES, 18”-24” MUST

EXTEND AT LEAST 6-

INCHES ABOVE CHASE

TOP FLASHING.

1/2-INCH
OVERHA NG

DURATECH

CHIMNEY

MAINTAIN 2-INCH
CLEARANCE BETWEEN
DURATECH CHIMNEY AND
CHASE ENCLOSURE

Figure 1

CHASE TOP
FLASHING OR
CHASE PAN

1/2-INCH

FIELD-FABRICATED

SPACERS FOR CHASE

TOP FLASHING

3