Introduction to Using Personal Protective Equipment

Restoration sites are not clean environments. The moment you open a wall cavity on a water-damaged house, pull up wet carpet in a Category 3 loss, or start fogging a mould-affected bathroom with a ULV machine, you are putting airborne hazards into the space you are breathing. Mould spores, biological particles from sewage contamination, chemical mists from disinfectants, and fine dust from material removal are all invisible at the concentrations that cause harm. The problem with respiratory hazards is that you rarely feel them working against you in real time. By the time your throat is irritated or your chest feels tight, you have already been exposed. A P2 disposable respirator, which filters at least 94% of airborne particles at 0.3 microns, is your baseline for mould remediation, biological hazard work, and chemical spray application on Australian job sites. If you are in a heavy remediation environment or a high-concentration particulate situation, step up to a P3, which filters at 99.95%. And if you are doing extended work in a contained area, a half-face respirator with replaceable P100 cartridges will give you better protection and significantly more comfort over a long shift. One thing that is never acceptable: a surgical mask. It does not meet particulate filtration standards and has no place in a restoration hazard environment, regardless of what is sitting in the van.

Picture this. You arrive at a pre-1990 house with confirmed mould behind the laundry wall and suspected asbestos-containing materials in the wall sheeting. The homeowner watches you unpack your gear and says, "I've just got a box of those blue masks from the chemist, can't you just use one of those?" The answer is no, and you need to be able to explain why without making the customer feel foolish. A practical response sounds something like: "Those masks are fine for dust around the house, but they're not rated for the particles we're dealing with in here. I need a respirator that's tested and certified to filter at the level this job requires." That is a calm, factual answer that protects your credibility and keeps the job moving. Your P2 or P3 respirator, fitted correctly, is the only appropriate choice for that environment. Selection is not about what is convenient or what is sitting in the ute. It is about matching the respirator to the specific hazard in front of you.

Fit-check is the step that gets skipped most often on real jobs, and it is the step that makes the difference between a respirator that works and one that just looks like it works. Before you walk into any hazardous atmosphere, take sixty seconds and do it properly. Put the respirator on, adjust the straps so the unit sits flat against your face with no gaps at the sides or bridge of the nose. Then do a positive pressure check: cover the exhalation valve and exhale gently. The mask should balloon slightly and hold. If you feel air escaping at the edges, the seal is broken. Next, the negative pressure check: cover the inhalation valve and inhale. The mask should collapse slightly inward and stay there. If it does not, air is getting in somewhere it should not be. Tighten the straps and repeat. If you have facial hair along the seal line, a flat-fold P2 is not going to seal against your face. That is not a criticism, it is physics. Plan accordingly, whether that means a powered air-purifying respirator or a different approach to the task.

Once you are on the job, the respirator does not last forever. Replace your P2 when breathing resistance increases noticeably, when it becomes wet from sweat, when you can smell chemical breakthrough, or when the manufacturer's recommended replacement interval is reached, whichever of those comes first. A clogged or saturated filter is not filtering at its rated level, and wearing it gives you false confidence with inadequate protection. Keep a small supply of spares in your kit so you are never in the position of pushing on with a spent respirator because you ran out. The relevant Australian standard for selection, use, and maintenance of respiratory protective equipment is AS/NZS 1715, and Safe Work Australia's Code of Practice for Managing Risks of Hazardous Chemicals provides the broader framework for how these decisions sit within your duty of care on site.