M&G DuraVent DuraStack® - Manual (Page 23)

23
Figure 35
Figure 36
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.
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.
Important
Crossing a combustible wall is not
permitted for diameters larger than 10”
inside diameter.
Sealant
Flashing
Combustible
roof/floor
Firestop Radiant Shield
2" Clearances (DIS)
4" Clearances (DAS)
No joint or
expansion length
in this area
Floor Guide
or Ventilated
Anchor Plate
Storm Collar
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 36.
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
Firestop Female Half
Chimney Length
Firestop Male Half