Basement wood stoves can present a variety of problems for the novice do-it-yourself enthusiast. Uninsulated basements lose heat and may not be ideal for wood stoves, yet installation of a chimney in a finished basement poses additional difficulties. While installation of an interior chimney is ideal, interior chimneys require special insulation, framing and finishing, and can pose a fire hazard if not done properly. For these reasons, installation of a simple exterior chimney often is the best do-it-yourself option for venting a basement wood stove.
Things You'll Need
- Class A chimney pipe
- Insulated wall thimble
- Concrete core drill (rental)
- Safety glasses
- Exterior wall support
- Insulated tee
- Heavy-duty drill
- Masonry drill bits
- Screwdriver bits
- Sheet metal screws
- Wood screws
- Masonry screws and anchors
- Chimney pipe wall bands
- Chimney pipe roof support
- Round chimney pipe cap
Contact your local government to ask about local code and fire ordinances that might relate to building a chimney for a basement wood stove. Confirm that it is acceptable to use prefabricated chimney pipe to build a capped, exterior metal chimney.
Drill a hole through the concrete block wall to receive the insulated wall thimble -- locate the hole so that the stove pipe can be routed to it easily and the chimney pipe can extend vertically to above the peak of the roof line. be sure to wear eye protection while drilling. Insert the insulated wall thimble in the wall and secure it in place according to the manufacturer's instructions.
Connect the stove vent pipe to the inside of the wall thimble, and secure it in place with sheet metal screws.
Connect the chimney pipe tee to the outside of the wall thimble, and secure it into place with sheet metal screws. Install the chimney pipe wall support below the tee, according to the manufacturer's directions, so that the tee rests firmly on the support.
Connect class A chimney pipe to the top of the tee and secure it into place with sheet metal screws. Extend the pipe up the wall, securing it in place with wall bands -- use a masonry drill and anchors to attach the bands to concrete block. Support the pipe with one wall band for every eight feet of pipe.
Continue to add sections of pipe, securing them in place with sheet metal screws, to extend the chimney at least two feet above the peak of the roof. Slide the roof support over the chimney, and attach the braces to the roof with wood screws -- attach the roof support to the chimney with sheet metal screws.
Place the round chimney cap onto the top of the chimney and secure it with sheet metal screws.
Contact a professional to test the draft of your chimney and wood stove to ensure proper ventilation for the health of your family.
Tips & Warnings
- Hire a professional to cut the hole through the basement wall to save yourself the hassle associated with this difficult task, especially if the concrete block is filled with concrete and may be reinforced with steel bars.
- Exterior chimneys may cool quickly and fail to draft properly -- if you live in a very cold area, you may need to insulate the stove chimney within a traditional brick chimney or prefabricated insulation, or install an interior stove chimney.
- Photo Credit chimney image by lefebvre_jonathan from Fotolia.com
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