If the area above the ceiling is not an attic, position the firestop spacer with the flange on the ceiling side and the angled portion extending up into the hole.
If the area above the ceiling is an attic, position the firestop spacer with the flange on the top of the framed hole and the angled portion extending down into the hole.
Firestop spacers are not available for, nor are they
required on vertical walls.
DO NOT put any sealant around the area where the outer pipe slides through the firestop spacer. If you seal this area, it may cause a fire hazard.
Attic Installation
Nails (4)
Firestop Spacer
Joist
Ceiling Installation
Joist
Firestop Spacer
Nails (4)
FP593
Fig. 17 Firestop spacer installations.
Canadian Requirements
for Insulation Shield
In Canada, an attic insulation shield is required to pre- vent attic insulaiton from contacxting the chimney sec- tion. Framing dimensions for the chimney hole should measure 14¹⁄₂” x 14¹⁄₂” (368 x 368 mm). An attic shield MUST be installed on top of attic joists (above the floor level). (Fig. 18)
Continue Installing Pipe to Complete Run
Continue attaching pipe sections to complete system to next level always being careful that the pipe is firmly snapped locked in place before proceeding to next pipe section.
Vermont Castings EWF30
Attic Insulation
Shield
Nails
(4 Required)
| Attic Joist |
| Base |
Ceiling | Flanges |
FP263 |
Fig. 18 Attic shield installation (Canadian requirement).
Chimney Supports
If chimney supports are required, they are installed the same as elbows. Nail chimney support straps to adja- cent structural framing, as shown on Figure 16. Bend straps as necessary and make sure they are secure so they will support the weight of the chimney. A chimney support is 2¹⁄₂" (64mm) long when installed. Consider this dimension when determining how many straight chimney sections are needed.
NOTE: Chimney supports are generally used in long
runs in a chase installation.
Additional Ceilings
If you encounter additional ceilings, repeat same steps required for first ceiling installation. See firestop illustra- tion in Figure 17.
Penetrating the Roof
Run pipe to roofline. Since chimney system must be vented to the
If a chase is used, refer to the installation manual pro- vided with the termination cap.
Locate Chimney Centerpoint on Roof
Use same procedure detailed in locating center point of the flue system.
Drive a nail up through roof at the center point. This will
determine center point on outside of the roof.
Cut and Frame Roof Hole
Size of roof hole varies with the type of chimney ter- mination installed. Refer to installation instructions provided with CFM Corporation chimney termination to find correct size of roof hole.
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