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NO FIRESTOP IN APPLIANCE VENT / CHIMNEY CHASE: 
An appliance vent chase or chimney chase is the framed area between floors or within a wall which surrounds the heater exhaust vent or any other fuel burning appliance vent or zero clearance fireplace chimney. See Figure 272. If the vent separated, or failed in some other way, or if the top or sides of the fireplace firebox failed in some way, the fire-stop should contain the fire before it spreads to the attic or between floors. Most building codes and standards require firestops in openings around pipes, vents, chimneys, ducts, fireplaces, and similar openings which could provide a passageway for fire at ceiling and floor levels and should be constructed of noncombustible materials. It is relatively easy to install firestops if you can gain access. Materials may be 1 1/2 inch thick lumber or 2 thicknesses of 3/4 inch lumber, with staggered lap joints, or may be 3/4 inch plywood or 5/8 inch type "X" drywall fastened securely in place. You may also use 26 gauge sheet metal fastened securely in place. Contact a General Building Contractor for assistance as needed. 

The above information was provided by TWI Systems Copyright 1995-2005 1-800-553-5660

 

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This file was last updated on Saturday, 29-Dec-2007 18:28:43 EST * Copyright © 2008 All rights reserved by: Accurate Inspections, Inc. A New Jersey home inspection firm providing New Jersey Certified Home Inspections in NJ, by New Jersey Licensed home inspectors. Inspector of record Michael Del Greco, New Jersey Home Inspector License GI 0121.
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