Firestop spacers are not available for, nor are they required on, vertical walls.
The CFM Corporation chimney components have been tested and approved with the area where the outer pipe slides through the firestop spacer sealed with a noncombustible caulk if desired, or left completely open with no sealant.
Continue Installing Pipe to Complete Run
Continue attaching pipe sections to complete system to next level always being careful that the pipe is firmly snap locked in place before proceeding to next pipe section.
Chimney Supports
If chimney supports are required, they are installed the same as elbows. Nail chimney support straps to adjacent structural framing, as shown in Page 8, Figure
9.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" (64 mm) 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 illus- tration on Page 12, Figure 19.
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 termination installed. Refer to installation instructions provided with CFM Corporation chimney termination to find correct size of roof hole.
There must be a 2" (51 mm) air space between out- ermost portion of chimney sections and any adjacent combustible surfaces. (Combustible surfaces include burnable materials such as: ceiling members, joists, flooring, combustible insulation and roof structures.)
ODSHR Outdoor Woodburning Fireplace
WARNING: DO NOT PACK REQUIRED AIR SPACES WITH INSULATION OR OTHER MATERIALS.
Mark an outline of the roof hole around the centerpoint of the nail. NOTE: Hole dimensions given in the chim- ney top installation instructions are horizontal dimen- sions; therefore, the hole size must be marked on the roof accordingly.
Cover the opening of the installed chimney so debris cannot get into the system.
Cut and frame the hole. It is good practice to use fram- ing lumber that is the same size as the rafters. Install the frame securely because the chimney top and flash- ing anchored to the frame must be able to withstand heavy winds.
Install Remainder of Chimney Sections
Since you have already preplanned the height of your termination according to the Ten Foot Rule, continue to install pipe to the predetermined height.
Check the chimney top installation instructions for details on how high above the roof top the chimney sections (all pipes) should extend.
Installing Top Housing or Termination
Follow the installation instructions provided with the CFM Corporation chimney termination you have se- lected.
Installing Chimney In a Chase
Refer to Page 5, Figure 4 for an illustration of a typical chase installation.
CAUTION: Treatment of firestop spacers and con- struction of chase may vary with type of building. These instructions are not a substitute for local building codes. You must check your local building codes to determine specific requirements for your city or state. NOTE: Other building materials may be required in ad- dition to Firestop Spacers.
Finishing
CAUTION: All joints between the finished wall and the fireplace surround (top/sides) must be sealed with noncombustible material to prevent cold air leakage into the room. Only noncombustible material may be applied to the facing of the fireplace surround. (Fig. 20)
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