Just how unsafe is hardiboard to cut & nail? Reason I'm asking is
because I just bought a new canister set for my AOS face mask and the
instructions say it protects against organic vapors but not silica
dust. Now I always thought a vapor was much finer than a dust, but I
guess not. I'm planning on replacing a bunch of masonite with
hardiboard panels but now I'm not sure what type breathing protection
I need when cutting the stuff.
The typical semi-cheapie particulate dust masks such as a N95, or a
N100 if you're, ahem, particular, is all that you need. I like the
ones with the little plastic exhalation valves as they keep the mask
from getting sopping wet and uncomfortable. You'll be cutting outside
of course, so just wear the mask and stay upwind. No problem.
Protection from organic vapors is a chemical process. Protection from
silica dust is just a really, really fine filter. Presumably the holes in
the organic canister are big enough to let small silica particles through;
or silica will plug it up really fast; or silica neutralizes the chemical
process; or something else I can't think of right now. Not knowing much,
I'd bet on the first one.
Nailing is no problem, but sawing makes lots of dust. You don't want to
breathe the dust.
You can get "scissors" for Hardie products. They're fast, easy to use, and
make no dust. You can rent them if you don't want to buy.
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