There is a lot of discussion on the forum in respect to using a 1" ventilated air space to reduce wall clearance between a wood stove and a wall.
In looking at Table 12.6.2.1 of NFPA 211 entitled Reduction of Appliance Clearance with Specified Forms of Protection, one of the approaches is described as "1/2 inch thick noncombustible insulation board over 1 inch glass fiber or mineral wool batts without ventilated air space". Has anyone used this approach, rather than using the ventilated air space?
I'm in the process of removing a zero clearance fireplace extrordinair, and am considering turning the chase into an alcove with a Pacific Energy T6. I'm OK with depth and height, but am about 4" per side too short on width to combustibles, and will need to use wall protection on the sides and rear of the alcove. My wife is not crazy about the 1" gap on the top and bottom when using the ventilated approach (she thinks it will look funny), so I'm wondering if I can use the approach outlined above instead. Stove manufacturer says it is OK to reduce clearances per local authority, local authority goes by the NFPA 211 standard. Therefore, I'm thinking we can use 1" Micore over the drywall, with 1/2" cement board over that, with no gaps for ventilation. Cement board would be covered with either tile, or finished smooth with drywall compound.
Any input on this would be greatly appreciated....
Bob
In looking at Table 12.6.2.1 of NFPA 211 entitled Reduction of Appliance Clearance with Specified Forms of Protection, one of the approaches is described as "1/2 inch thick noncombustible insulation board over 1 inch glass fiber or mineral wool batts without ventilated air space". Has anyone used this approach, rather than using the ventilated air space?
I'm in the process of removing a zero clearance fireplace extrordinair, and am considering turning the chase into an alcove with a Pacific Energy T6. I'm OK with depth and height, but am about 4" per side too short on width to combustibles, and will need to use wall protection on the sides and rear of the alcove. My wife is not crazy about the 1" gap on the top and bottom when using the ventilated approach (she thinks it will look funny), so I'm wondering if I can use the approach outlined above instead. Stove manufacturer says it is OK to reduce clearances per local authority, local authority goes by the NFPA 211 standard. Therefore, I'm thinking we can use 1" Micore over the drywall, with 1/2" cement board over that, with no gaps for ventilation. Cement board would be covered with either tile, or finished smooth with drywall compound.
Any input on this would be greatly appreciated....
Bob
