Installation
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
17
SECTION D - ROOF AND WALL PENETRATIONS
ROOF/FLOOR PENETRATION
1. The roof/floor penetration consist of a firestop radiant shield (FS), a
flashing (F) with a storm collar (SC) and a floor guide (FG) or ventilated
anchor plate (APV) (see Figure 36 roof/floor penetration).
2. Those components allows the chimney to penetrate a combustible roof
or floor at 2 inches clearance to combustible. See table 3 – Minimum
openings for framing dimension.
3. The radiant shield of the firestop may need to be trimmed to fit the
height of the roof. Nominal height is 10 inches.
4. Roof/floor penetration components are designed to be installed on a
flat roof. They may be installed on a pitch roof if a curb is installed
to provide a flat surface.
5. Floor guide is used to protect the flashing from lateral movement. The
ventilated anchor plate is used to protect the flashing and to provide
a re-support.
6. Do not install a chimney joint or a expansion length in the roof/floor
space.
7. For installation on non-combustibles materials, the minimum opening
can be reduced to I.D. + 6 inches. The anchor plate can also be used
instead of the ventilated version.
8. Always seal, with outer joint sealant, between storm collar and outer
chimney casing.
9. Installation step:
a. Cut opening to dimensions specify in table 3.
b. Install the Firestop under the roof/floor and attach it with screw.
c. Slide DIS / DAS chimney trough the firestop.
d. Install the floor guide or the ventilated anchor plate on top of the
roof/floor.
e. Install flashing over the chimney and the guide/support and
screw it.
f. The storm collar is placed around the chimney and sealed to the
casing with outer joint sealant. The storm collar should not quite
rest on the flashing when the chimney is cold (1/4” gap between
the collar and the top of the flashing).
WALL PENETRATION
1. This part is used to allow model DIS / DAS chimney to pass trough a
wall made of combustible construction.
NOTE: Crossing a combustible wall is not permitted for diameters
larger than 10” inside diameter.
2. The wall penetrator (FSW) consist of a firestop female half and a male
half that slide in each other to adjust wall thickness from 7.8” to 12.1”,
see Figure 37.
3. Installation step:
a. Cut opening to dimension indicated in table 3.
b. Slide the firestop female half into the opening and fix it to the
wall with screws.
c. On the other side of the wall, slide the male half into the opening
and fix it.
d. Insert the chimney trough the opening of the wall firestop. Make
sure there is no chimney joint or expansion length in the wall
opening.
e. The chimney section must be well supported and guided to
prevent any load on the wall firestop.
Figure 37 - Wall firestop
Firestop
female half
Chimney
length
Firestop
Male half
Figure 36 - Roof / floor penetration
Storm Collar (SC)
Floor guide or
ventilated anchor
plate
No joint or expansion
length in this area
Firestop radiant shield
Sealant
Flashing
2” Clearances (DIS)
4” Clearances (DAS)
Combustible
roof / floor