Installation

Continued

 

Penetrating roof

 

 

To maintain a 2" clearance to pipe on roof with

 

a pitch, a rectangular opening must be cut.

Screws

1.

Determine center point through which pipe

 

will penetrate roof.

 

B

 

 

2. Determine center point of roof. Pitch is

 

 

 

the distance the roof drops over a given

 

 

span, usually 12".

 

 

3. Use roof opening chart (Figure 12) to

 

 

determine correct opening length and

 

 

flashing required.

 

A

4. Remove shingles around opening mea-

Figure 9 - Elbow Offset

 

sured. Cut out this section.

 

Firestop Spacers (FS-10)

5.

Add next sections of pipe until end

Firestop spacers are required at each point

 

penetrates roof line. Check to see that

where chimney penetrates a floor space.

 

proper clearances are maintained. Extend

Their purpose is to establish and maintain

 

chimney by adding sections of double wall

required clearance between chimney and

 

pipe until pipe is minimum of 30" above

combustible materials. When pipe passes

 

highest point of roof cutout. Termination

through a framed opening into a living space

 

and chimney must extend a minimum of

above, firestop must be placed onto ceiling

 

36" above highest point where it passes

from below as shown in Figure 10.

 

through roof.

 

They also provide complete separation from

 

 

 

one floor space to another or attic space as

 

 

 

required by most codes. When the double wall

 

19.5" Min.

30" Min.

pipe passes through a framed opening into an

 

2" Min.

 

attic space, the firestop must be placed into

 

 

2" Min.

an attic floor as shown in Figure 11.

 

 

 

Existing

 

2" Min.

 

Ceiling

 

 

 

 

 

Frame

 

 

 

Firestop

Opening "A"

Spacer

 

 

Screws or

Pitch

Slope

Opening

Used Flashing

 

Staples

 

(Min. of 8)

 

 

"A" Max.

Model No.

 

Flat

0°

19.5"

V6F-10DM

Figure 10 - Firestop Spacer with Living

0-6/12

26.6°

22'

V6F-10DM

 

Space Above Ceiling

 

6/12-12/12

45.0°

27"

V12F-10DM

 

 

Firestop

Screws or Staples

Figure 12 - Roof Opening Measurements

(Min. of 8)

 

 

 

 

Spacer

 

 

 

 

 

 

Existing

 

 

 

 

 

Ceiling

 

 

 

 

 

Frame

 

 

 

 

Figure 11 - Firestop Spacer with Attic

 

 

 

 

 

Space Above Ceiling

 

 

 

 

8

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