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Gromit 08-13-2009 12:45 PM

Fireclay vs. Sand for floor
The subject of sourcing fireclay seems to generate a lot of questions.

After I went to the trouble of sourcing it for laying my floor, I made a mess of a sand/fireclay/water mixture that I later scraped off my insulation board (and took some of the insulation with it). I then mixed the fireclay and sand together and used that dry to lay my floor. I ran out of fireclay, so I just used sand for the rest of it.

If one is going to use a wet leveling mix, I can understand that the fireclay makes for a sticky mix. But for dry leveling, is there really an advantage to mixing the sand with fireclay?

dmun 08-13-2009 01:02 PM

Re: Fireclay vs. Sand for floor
Sand is loose, and travels, as is shown by the brick walk i laid on sand some years ago. Using the fireclay/sand mixture lets it set up into something more solid, which will be a better base for your floor.

Laying it dry is a good idea, btw, but it works best if you wet the floor afterword to set up the mixture.

Gromit 08-14-2009 08:42 AM

Re: Fireclay vs. Sand for floor
I sealed all of the sand and fireclay in by squeezing a bit of mortar all around where the perimeter of the floor meets the insulation board. So, hopefully my sand will not go traveling too far.

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