I required that all the people doing the work use respirators.

If there is black mold in the attic, you need to careful in touching it - wear a respirator to avoid health issues.  

Ask upfront for a clear timeline and scope of work so you can plan accordingly.And if you’re planning to be on-site at all, I highly recommend investing in a high-quality respirator.

.☐ Wear protection: Use gloves, N95 respirator, goggles, and protective clothing.4.

Bad, real bad, respirator bad.

I once bought a house that was so terrible of cat piss that you virtually couldn't go in without a respirator and I thought I'd have to tear out the subfloors to fix.

When they started sanding the smell got so bad you needed charcoal respirators to even be in the house.

If the home is stripped to the studs, and I personally do the work, wearing a P99 full face respirator along with full body disposable suit... the place is aired out, I give the chemicals time/heat to volatilize...

I had to wear a respirator to stand it.

We had to wear suits, respirators, safety glasses, and gloves.