Greetings to all -
First, what an AWESOME forum...LOTS of wisdom it seems. Hope you don't mind fielding questions from someone who's been out of the woodstove burning loop for about five years (during house renovations) and has purchased a Hearthstone Mansfield for a Great Room corner install.
Prior to my hiatus, I was an avid wood burner. When I bought the house it had an old BOSS woodstove. From 1992-2004 I only used about a half tank of fuel oil....I'm cheap
Because the BOSS was in place prior to me purchasing the house, I've never done an install....
I've been trying to interpret the Standards presented in the NFPA Table 12.6.2.1 and in doing so, it appears that the company from which I'm purchasing the woodstove from is providing conflicting information against the NFPA standard....more to follow on that in a later paragraph.
My installation goal is to place the unit as close as possible to the corner, in order to provide for 1) straight piping up and out and 2) adequate flashing clearance from the roof ridge once outside. By using a Rear Heat Shield, and Double wall connector pipe, the user's manual states the corner distance to protected surfaces (NFPA 211) to be 7 inches.
NFPA 211, Table 12.6.2.1 provides only two options (a) and (b) - that do not involve the use of a ventilated air space - for clearance reduction (ie creation of a protected surface). The provision of (b) follows:
1/2 inch noncombustible insulation board over 1 in glass fiber or mineral wool batts without ventilated air space.
Ok - so what exactly does that look like? One of the corner walls is an outside wall. Both walls have wooden 2x4's holding up the drywall. If I were to remove the drywall and place 1 inch of mineral wool batts (lovingly known to me as rotton cotton) between the studs, and slap on 1/2 in thick piece of Hardibacker, have I met this requirement?
Here's the solution offered by the company that sold me the woodstove: Leave drywall in place and cover with TWO 1/2 in pieces of Hardibacker.....but I don't find that anywhere in the NFPA 211 Table 12.6.2.1.
THEN there's the question of what to put over top of the Hardibacker. I know that tile would be the lightest, least expensive way to go, BUT - aesthetically I really like a pre-fab interlocking stone product in which the stones are held together with some type of epoxy. I don't know if that would completely hose the non-combustibility requirement......Argh!
Safety is first with me - but placement of the woodstove is a close second, and right-on-the-heels is a nice 'look'
Any/all comments welcomed....and thanks so much for reading!
First, what an AWESOME forum...LOTS of wisdom it seems. Hope you don't mind fielding questions from someone who's been out of the woodstove burning loop for about five years (during house renovations) and has purchased a Hearthstone Mansfield for a Great Room corner install.
Prior to my hiatus, I was an avid wood burner. When I bought the house it had an old BOSS woodstove. From 1992-2004 I only used about a half tank of fuel oil....I'm cheap
Because the BOSS was in place prior to me purchasing the house, I've never done an install....I've been trying to interpret the Standards presented in the NFPA Table 12.6.2.1 and in doing so, it appears that the company from which I'm purchasing the woodstove from is providing conflicting information against the NFPA standard....more to follow on that in a later paragraph.
My installation goal is to place the unit as close as possible to the corner, in order to provide for 1) straight piping up and out and 2) adequate flashing clearance from the roof ridge once outside. By using a Rear Heat Shield, and Double wall connector pipe, the user's manual states the corner distance to protected surfaces (NFPA 211) to be 7 inches.
NFPA 211, Table 12.6.2.1 provides only two options (a) and (b) - that do not involve the use of a ventilated air space - for clearance reduction (ie creation of a protected surface). The provision of (b) follows:
1/2 inch noncombustible insulation board over 1 in glass fiber or mineral wool batts without ventilated air space.
Ok - so what exactly does that look like? One of the corner walls is an outside wall. Both walls have wooden 2x4's holding up the drywall. If I were to remove the drywall and place 1 inch of mineral wool batts (lovingly known to me as rotton cotton) between the studs, and slap on 1/2 in thick piece of Hardibacker, have I met this requirement?
Here's the solution offered by the company that sold me the woodstove: Leave drywall in place and cover with TWO 1/2 in pieces of Hardibacker.....but I don't find that anywhere in the NFPA 211 Table 12.6.2.1.
THEN there's the question of what to put over top of the Hardibacker. I know that tile would be the lightest, least expensive way to go, BUT - aesthetically I really like a pre-fab interlocking stone product in which the stones are held together with some type of epoxy. I don't know if that would completely hose the non-combustibility requirement......Argh!
Safety is first with me - but placement of the woodstove is a close second, and right-on-the-heels is a nice 'look'
Any/all comments welcomed....and thanks so much for reading!
