Is an N95 enough for concrete sawing?

For occasional wet-cutting, an N95 may suffice. For prolonged or dry sawing, a P100 or half-mask with P100 cartridge is better. Assessment depends on measured or estimated concentration.

How often to fit test?

RSST recommends at least annually and whenever a mask model change, significant weight change, or facial surgery might affect fit.

Can you wear an RPE with a beard?

No—beards prevent negative-pressure masks from sealing. Bearded workers must use positive-pressure units (supplied air or PAPR) or shave.

How to add RPE checks in OK Sécurité?

Tasks with respiratory risk (asbestos, welding, painting) already include PPE items. You can also create a custom list for your respiratory program.

Guides

Respiratory protection on construction sites

Updated March 30, 2026

Silica dust, welding fumes, asbestos, and VOCs threaten construction workers' lungs. The right respirator, properly fitted and maintained, makes the difference.

When is an RPE needed?

RSST requires respiratory protection when contaminant concentrations exceed permissible exposure values and engineering controls (ventilation, source capture) are insufficient.

In construction, common situations include: concrete or ceramic sawing (silica), welding and cutting (metal fumes), spray painting (VOCs, isocyanates), asbestos removal, and drywall sanding.

Choosing the right type

Disposable N95/P100 masks suit dust and particulates. Half-mask cartridge respirators protect against organic vapors and some gases. Supplied-air units are needed for high-risk asbestos work and hazardous-atmosphere confined spaces.

Selection must consider contaminant type, concentration, and working conditions. A written respiratory protection program is best practice and required by RSST in some situations.

Fit and seal check

A poorly fitted RPE provides no protection. Fit testing must occur before first use and periodically after. Beards, scars, and some glasses can compromise the seal.

Before each use, the worker should perform a quick seal check (positive and negative pressure) to verify proper positioning.

Maintenance and replacement

Filter cartridges have limited service life depending on contaminant concentration and humidity. Follow manufacturer guidance and replace when the worker detects odor or taste through the filter.

Store RPE in a clean, dry place. Inspect straps, valves, and seals before each use. OK Sécurité helps integrate these checks into your daily lists.

This guide is informational. RPE selection must be based on site-specific risk assessment. Consult an industrial hygienist for complex situations.

Related checklists

Checklists for respiratory-risk tasks:

Browse all checklists View plans

Common questions

Is an N95 enough for concrete sawing?: For occasional wet-cutting, an N95 may suffice. For prolonged or dry sawing, a P100 or half-mask with P100 cartridge is better. Assessment depends on measured or estimated concentration.
How often to fit test?: RSST recommends at least annually and whenever a mask model change, significant weight change, or facial surgery might affect fit.
Can you wear an RPE with a beard?: No—beards prevent negative-pressure masks from sealing. Bearded workers must use positive-pressure units (supplied air or PAPR) or shave.
How to add RPE checks in OK Sécurité?: Tasks with respiratory risk (asbestos, welding, painting) already include PPE items. You can also create a custom list for your respiratory program.