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Posted by jeffreydesign on September 14, 2006, 12:43 pm
Hardibacker all the way -
I want to voice a note of caution however, you should NOT use a power
saw to cut Hardibacker unless you are wearing a resperator, and you
should wear a resperator when sweeping up cuttings as well. Hardibacker
dust when inhaled can cause silicosis (a dangerous and sometimes fatal
lung disease)- and it doesn't take long exposures over many years to
get it either. It's better to just score and break it.
Jeff
Keith Williams wrote:
> jackjohansson@gmail.com says...
> > I am finishing a new bathroom just off my mudroom/garage. I am trying
> > to decide if I should back ceramic tile with cement board or Hardi
> > backer. This will be for a very heavy use shower.. wash out camping
> > stuff.. push kids in when they come home from football practice all
> > muddy... not a powder room for makeup.. but a heavy use
> > shower/bathroom.
> >
> > Cost: HB is about a buck more per sheet.. not enough to be a
> > deal-killer if Hardi-backer is better.
>
> AFAIAC, it is. I'll never use cement board again. Though neither
> is indestructible.
>
> > I have cut and hung a few sheets of cement board to finish off another
> > bathroom, it is heavy, but do-able. Obviiosly HB is lighter, and
> > would be easier to handle, but is it as durable in a heavy use shower?
>
> I think it's more durable, over the long run. I worried abut
> cement board cracking with any repeated flex. I don't think I'd
> use it on the floor.
>
> > Do I need a special blade for HB? I picked up a 5 dollar blade at
> > Harbor Freight that rips right through cement board, but at another
> > place I saw a blade especially for hardibacker and it was 50 bucks. Do
> > I need that special blade for HB?
>
> I just use a carbide blade in a 3-3/8" Makita 9.6V cutoff saw.
> Cuts like butter. You can also score and break it, like sheetrock
> (on steroids but I find it's easier to just cut it.
>
> > Floor will be slate, is HB good to back slate floor tiles in a heavy
> > use area? Or am I better off using Cement board?
>
> Is your subfloor solid? If so, I wouldn't worry about HB. Walls
> might need some reinforcement. HB over plywood ought to be good
> enough for a tank-wash. ;-)
>
> --
> Keith
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