Respiratory Protective Equipment (RPE) for Trades — Masks, Face-Fit & the UK Rules (2026)

RPE Is the Last Resort, Not the First

The most important thing to understand is that a mask is the bottom of the control hierarchy, not the top. COSHH requires you to control exposure at source first, and RPE only comes in to deal with whatever exposure is left over. The order you must work through is:

• Eliminate or substitute: buy materials pre-cut, order made-to-measure, or use a lower-dust product where one exists.
• Engineering controls: on-tool dust extraction (an M-class or H-class vac connected to the cutter, grinder or sander) and Local Exhaust Ventilation (LEV) capture the dust before it reaches the air you breathe.
• Water suppression: wet-cutting paving, blocks and concrete keeps respirable crystalline silica (RCS) out of the air entirely.
• RPE: only after the above, to control residual exposure — and often alongside them, not instead.

If an HSE inspector finds your team relying on FFP3 masks while dry-cutting kerbs with no water and no extraction, you are in breach — the mask is doing a job the law says other controls should have done first. RPE compensates for the dust you couldn't engineer out, not for skipping the controls entirely.

The Hazards You're Protecting Against

Knowing what's in the air tells you what protection level you need. The common trade hazards are:

• Respirable crystalline silica (RCS): from cutting, grinding or drilling concrete, brick, block, stone, mortar and sandstone. The single biggest dust risk for builders and groundworkers — causes silicosis and lung cancer.
• Wood dust: hardwood and softwood dust both carry a Workplace Exposure Limit. Hardwood dust is a known cause of nasal cancer. Joiners and carpenters are most at risk.
• MDF and composite board dust: contains fine wood dust plus resin binders. Treat it as you would hardwood dust.
• Cement dust: irritant and a cause of allergic dermatitis as well as a respiratory irritant.
• Isocyanate paint mists: from two-pack spray paints and some lacquers. A leading cause of occupational asthma — once sensitised, a painter may have to leave the trade.
• Asbestos: still present in any building built or refurbished before 2000. Note that licensed asbestos work requires specific RPE (typically a powered, full-face unit) and falls under the Control of Asbestos Regulations 2012 as a separate, tightly controlled regime — never treat asbestos as just another dusty job.

Types of RPE and Protection Factors

RPE is rated by Assigned Protection Factor (APF) — the number of times it reduces the wearer's exposure when used correctly. An APF of 20 means the air inside the mask contains one-twentieth of the dust in the surrounding air. You match the APF to how dusty the task is.

Disposable FFP masks (FFP2 / FFP3)

Filtering facepieces are the familiar moulded masks. FFP2 has an APF of 10 and is suitable for lower-level nuisance dust. FFP3 has an APF of 20 and is the minimum standard for silica, wood dust and most serious trade dusts. Crucially, FFP2 and FFP3 are tight-fitting masks — they only achieve their rated protection if they seal to the face, which means they must be face-fit tested (more on that below). A valved FFP3 is more comfortable for sustained work because it vents exhaled air.

Reusable half masks with P3 filters

A rubber or silicone half mask fitted with P3 particulate filters gives an APF of 20, the same as FFP3, but tends to seal more reliably and is more economical over time because you only replace the filters. P3 filters can be combined with gas/vapour cartridges (for example A2P3 for solvent-based paint work). These are tight-fitting and also require face-fit testing.

Powered respirators (PAPR) — hoods and helmets

A powered air-purifying respirator uses a battery-driven fan to push filtered air into a hood, visor or helmet. Because the airflow keeps the headtop at positive pressure, a loose-fitting PAPR hood can reach an APF of up to 40 and — critically — does not rely on a face seal. That makes powered hoods the answer for the very dustiest tasks and for workers who cannot be clean-shaven. Loose-fitting PAPR headtops do not require face-fit testing, which is a major practical advantage for bearded workers.

Face-Fit Testing — the Legal Requirement Most Trades Miss

This is the part that catches businesses out. For any tight-fitting mask — that's every disposable FFP and every reusable half or full mask — the law requires a face-fit test. It is a specific duty under COSHH and the Control of Asbestos Regulations. A mask that doesn't seal to that individual's face offers a fraction of its rated protection, so the test confirms the chosen make, model and size actually fits the person wearing it.

The key rules:

• Before first use: the test must be done before the worker relies on that mask on site, not after.
• Clean-shaven face: the test — and every subsequent use — must be on a clean-shaven face. Even a day or two of stubble breaks the seal.
• Per make, model and size: a pass on one mask does not transfer to a different brand or size. If you change mask model, the worker must be re-tested.
• Re-test when the face changes: significant weight change, dental work, facial surgery or scarring can all alter the seal and trigger a re-test.

There are two methods. Qualitative fit testing relies on the wearer tasting or smelling a bitter or sweet test agent sprayed around the mask — a pass means they can't detect it. It's simpler and cheaper but only valid for disposable FFP and half masks. Quantitative fit testing uses a machine (such as a Portacount) to measure particle counts inside and outside the mask and produce a numerical fit factor. Quantitative testing is required for full-face masks and is generally more robust.

Use a tester accredited under the Fit2Fit scheme. Fit2Fit is the industry-recognised accreditation for fit testers, backed by the BSIF and supported by the HSE, and using an accredited tester is the clearest way to demonstrate your fit testing was competently done if you're ever challenged.

Why Beards and Stubble Break the Seal

A tight-fitting mask works by pressing rubber or moulded fabric against bare skin to make an airtight seal. Facial hair on the seal line — even short stubble — props the mask off the skin and creates microscopic gaps that let unfiltered dust leak straight in. Studies routinely show seal performance collapsing within hours of shaving as stubble regrows. There is no "trimmed beard" workaround for tight-fitting RPE: it is clean-shaven or nothing.

If a worker won't or can't shave — for medical, religious or personal reasons — the answer is a loose-fitting powered hood (PAPR), which seals via positive airflow rather than against the skin and so works fine with a beard. Plan for this rather than letting a bearded worker wear an FFP3 that isn't protecting them.

Maintenance, Storage and Daily Use

RPE only protects if it's in good condition and used properly. Build these habits into your team's routine:

• Pre-use checks: every time, inspect for damage and carry out a fit check (a quick positive/negative pressure check by covering the filter and breathing) to confirm the seal before starting work.
• Filter changes: replace particulate filters when breathing becomes harder or per the manufacturer's schedule; replace gas/vapour cartridges by smell or service-life calculation, never "until they look dirty".
• Cleaning: wipe down and clean reusable masks after each use, and dry fully before storage.
• Storage: keep masks in a clean, dry box or bag away from dust, sunlight and solvents — not loose in the bottom of the van.
• Disposables are single-shift: an FFP mask is generally good for one shift at most, then binned — they are not a re-use item.
• User training: wearers must be trained how to fit, check, clean and store their RPE, and records of that training kept.
• Clean-shaven policy: have a written policy that anyone using tight-fitting RPE turns up clean-shaven, and enforce it.

Employer Duties — What the Law Expects of You

If you employ anyone — or use labour-only subcontractors you direct — you carry legal duties under COSHH for their respiratory protection. In practice that means you must:

• Provide suitable RPE free of charge. The cost of masks, filters and powered units is the employer's, not the worker's — you cannot pass it on.
• Select the right RPE for the hazard and the task, based on your COSHH assessment and the required protection factor.
• Arrange face-fit testing for every wearer of tight-fitting RPE before first use.
• Train wearers in correct use, fit checking, cleaning and storage.
• Maintain and examine reusable and powered RPE, with thorough examination and testing of powered units at least monthly.
• Keep records: fit test results, training, maintenance and examination records. If you can't produce the paperwork, you can't demonstrate compliance.

Quick Reference: RPE Types, Protection and Use

Practical Buying and Using Tips

• Default to FFP3 or P3, not FFP2. For real trade dust — silica and wood especially — FFP2 isn't enough. Standardise on FFP3 disposables or P3 half masks so nobody grabs the wrong box.
• Stock more than one model and size. Faces differ; one mask shape will not fit everyone. Carrying two or three models means most people can pass a fit test.
• Reusable masks pay for themselves on regular dusty work — only the filters are consumable, so the running cost is lower than a steady stream of disposables.
• Buy CE/UKCA-marked RPE from a reputable supplier — cheap, unmarked imports may not deliver the protection claimed.
• Book fit testing in batches when you take on new workers or change mask model, and diarise re-tests so they don't lapse.
• Keep RPE with the tool. Pairing the right mask with the grinder or saw in the van makes it far more likely it actually gets worn.

Get This Right — Because the Stakes Are Lungs

It's easy to treat masks as an afterthought when the dust isn't visibly bothering anyone today. But occupational lung disease is the biggest killer in this industry precisely because the damage is invisible until it's irreversible. Controlling dust at source, choosing RPE with the right protection factor, face-fit testing every tight-fitting mask, keeping workers clean-shaven and holding the records to prove it — that's not box-ticking, it's what keeps your team breathing in twenty years' time. It also keeps you on the right side of COSHH if an HSE inspector turns up. Make it part of how the business runs, not something you scramble for after an enforcement notice.