judeaboo said:
Hello. I would like some advice on putting in a new hearth pad for the least amount of money possible. We have a Resolute Acclaim Wood stove Model # 2490. The current hearth pad is not large enough and has broken tiles. I looked into purchasing new ones and they range from $400-600 and we just don't have that to spend. What would be the least expensive way to get a safe floor protector? Thank you so much for your help!
Judeaboo
Depends on what your existing floor / hearth is made from, and the exact R-value that your stove (a VC or Vermont Castings brand) requires, then on what you want in the way of "style"
First look in the manual for your stove, and it should give you a specification for thesize and R-value of the floor protection you need. The R-value is essentially the amount of insulation value your hearth protection must provide in order to ensure that the heat coming off the underside of the stove won't set the floor on fire. The easiest way to go after that is to look at (broken link removed to http://www.chimneysweeponline.com/horvalue.htm) and figure out the best combination of materials that will stack up to give you AT LEAST that high of an R-value. If you are trying to match the height of an existing floor you will have to pretty much go with at least one layer of Micore, which is expensive, but if that isn't an issue, probably the cheapest way to go is to stack up layers of cement board or durock and cover it with ceramic tile.
Another approach is to build a frame out of steel studs and cover it with a couple layers of Durock and tile... The air space underneath will act as an insulator as well.
A few fine points -
1. It doesn't explicitly add R-value, but many people like to put a layer of thin sheet metal between two of the Durock layers to act as a heat spreader.
2. When screwing layers together, it is best to use short screws that only tie two layers together at a time rather than long screws that go through the entire stack, as this avoids having a single continuous heat path (off set the short screws from each other) - again this isn't explicitly specified, but is considered "good practice"
3. Go easy on the number of screws - the pad isn't going anywhere with several hundred pounds of stove sitting on it!
4. It can pay to go oversize / thickness on your floor protection if you ever think you might want a bigger stove - it increases the odds that the upgraded stove won't require you to upgrade the pad as well...
5. US codes require 16" of fireproof floor (hearth pad) in front of loading doors, the Canadians require 18". The theory is to catch any sparks or burning debris that might fall out of the stove. I see it as cheap insurance to go for at least the Canadian distance, maybe even two feet...
6. If you are using a stack of cement board type design, you'll probably want a frame of some sort around it. You can use wood but only if the pad is larger than the minimum size - the wood can't fall inside the minimum pad size area.
If you do a search on Hearth Design in this forum or in the gallery, you will see lots of discussion on how to design and build a safe hearth.
Gooserider