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Floor Protection
Posted: Sun. Mar. 13, 2011 6:38 pm
by NH Fire Dog
Hello, I"m brand new to this board and have a question regarding floor protection. I am having a new LL Hearth installed. I have a raised hearth fireplace where the new "hearth" will be installed. The stove will sit on the fireplace hearth which is 12 inches high (from the floor) The owners manuel requires the floor protection to be 1.2 R Value. According to this article:
https://www.hearth.com/econtent/index.php/article ... rth_design
It lists the R Values for all materials and such including ” air space, ventilated ” This appears to be the best rated at 1.43 per inch.
Now since there is 12 inches between the front of my stove and where the floor is, can I effectively calculate the R Value to be:
1.43 X 12 = 17.16
Am I interpreting the R value requirements correctly to believe that I do not need any floor protection since there is 12 inches of air space between the front of the stove and the floor? And If I need to have 16" of floor protection in the front, what material(s) will accomplish this? ( owners manual from LL states, "USE APPROVED FLOOR PROTECTOR, MUST HAVE 1.2R VALUE" )
Thanks,
Re: Floor Protection
Posted: Sun. Mar. 13, 2011 7:17 pm
by WNY
That is directly under the stove, are you mounting it directly on the hearth? The brick is non combustible, you should be good. I believe that is if you are mounting it on a combustible surface.
Re: Floor Protection
Posted: Sun. Mar. 13, 2011 7:33 pm
by NH Fire Dog
Yes Dave, I am mounting it right on the fireplace hearth.. The LL Hearth will pretty much come to the front edge. I was wondering how the 16" clearance requirement would apply in this case?
Re: Floor Protection
Posted: Sun. Mar. 13, 2011 7:42 pm
by freetown fred
I'm pretty sure you will have to put something 16-18 " out from your brick to stay within code--I've seen 1/2 brick that would do the trick--fancy it up a little angle wise. I've got 1/2" thick ceramic tile on 3/4" plywood under my Hitzer & our code guy OK'd it.
Re: Floor Protection
Posted: Sun. Mar. 13, 2011 9:03 pm
by lowfog01
NH Fire Dog wrote:Yes Dave, I am mounting it right on the fireplace hearth.. The LL Hearth will pretty much come to the front edge. I was wondering how the 16" clearance requirement would apply in this case?
Yes, you still have to account for the 16" clearance out in front of the stove. You can do a couple of things. One is get a piece of concrete board and cut it to the size you need and put some ceramic tile, thin bricks or other finishing material on it. I believe the board and finishing material meet code. Run a piece of trim on the edge to give it a finished look. Or you can go to a local stove shop and buy a hearth mat that meets code and will just lay in front of your stove. They come in all sizes and colors. The pads actually are very convenient because you won't trip over it and they can be picked up in the off season. They are also pricey. I don't know if your stove is a handfed stove but if it is you will want the extra non-combustible surface. In a handfed, hot coal has a tendency to "jump" out of the stove during re-freshening and that could cause problems. I have a burn mark on my hardwood floor to remind me to always check for any hot coals that slipped out before I close it up after refreshing it. Good luck, Lisa
Re: Floor Protection
Posted: Sun. Mar. 13, 2011 9:05 pm
by lowfog01
lowfog01 wrote:NH Fire Dog wrote:Yes Dave, I am mounting it right on the fireplace hearth.. The LL Hearth will pretty much come to the front edge. I was wondering how the 16" clearance requirement would apply in this case?
Yes, you still have to account for the 16" clearance out in front of the stove. You can do a couple of things. One is get a piece of concrete board and cut it to the size you need and put some ceramic tile, thin bricks or other finishing material on it. I believe the board and finishing material meet code. Run a piece of trim on the edge to give it a finished look. Or you can go to a local stove shop and buy a hearth mat that meets code and just lay it in front of your stove. They come in all sizes and colors. The pads actually are very convenient because you won't trip over it and they can be picked up in the off season. They are also pricey. I don't know if your stove is a handfed stove but if it is you will want the extra non-combustible surface. In a handfed, hot coal has a tendency to "jump" out of the stove during re-freshening and that could cause problems. I have a burn mark on my hardwood floor to remind me to always check for any hot coals that slipped out before I close it up after refreshing it. Good luck, Lisa
Re: Floor Protection
Posted: Sun. Mar. 13, 2011 10:33 pm
by NH Fire Dog
lowfog01 wrote:lowfog01 wrote:
Yes, you still have to account for the 16" clearance out in front of the stove. You can do a couple of things. One is get a piece of concrete board and cut it to the size you need and put some ceramic tile, thin bricks or other finishing material on it. I believe the board and finishing material meet code. Run a piece of trim on the edge to give it a finished look. Or you can go to a local stove shop and buy a hearth mat that meets code and just lay it in front of your stove. They come in all sizes and colors. The pads actually are very convenient because you won't trip over it and they can be picked up in the off season. They are also pricey. I don't know if your stove is a handfed stove but if it is you will want the extra non-combustible surface. In a handfed, hot coal has a tendency to "jump" out of the stove during re-freshening and that could cause problems. I have a burn mark on my hardwood floor to remind me to always check for any hot coals that slipped out before I close it up after refreshing it. Good luck, Lisa
Thanks Lisa...I guess I'll just find a Micore 300 which has a 1.1 R Value and add the hardiebacker, and I'll accomplish the 1.2 that I need. Found out about the Micore from the Hearth.com forum. Those guys are pretty savy over there too.