How to Protect Construction Crews from Respiratory Hazards

By Rick Pedley, Contributor

Airborne particles, fumes, and gases usually go unnoticed until long after they’ve started damaging workers’ health.

Construction sites hum relentless activity – a cacophony of hammering, grinding, and rumbling machines simultaneously signaling progress and potential danger. But while crushing injuries, electrocution, and falls often dominate safety protocols, invisible threats can be equally perilous. Airborne particles, fumes, and gases usually go unnoticed until long after they’ve started damaging workers’ health, contributing to chronic illnesses, life-threatening conditions, and reduced quality of life for those exposed.

In 2023, there were 100,200 reported cases of respiratory illnesses among US workers.[i] While this is the lowest figure since 2019, exposure to airborne contaminants remains a serious risk in construction. According to the Occupational Safety and Health Administration (OSHA), respiratory protection remains one of the most frequently-cited safety violations,[ii] underscoring the need for stricter compliance and heightened awareness of respiratory hazards.

Understanding Common Construction Respiratory Hazards

Despite progress in reducing workplace illnesses, the construction industry continues to battle exposure to airborne threats like silica, asbestos, and volatile organic compounds (VOCs). Here’s what your team may be breathing in:

Silica Dust

A natural component of materials like sand, stone, and concrete, crystalline silica becomes airborne during activities such as drilling, grinding, or cutting. Once inhaled, it can result in long-term health issues, including:

• Silicosis (An incurable lung disease)
• Lung Cancer
• Chronic Obstructive Pulmonary Disease (COPD)
• Kidney Disease

OSHA’s Standard 29 CFR 1926.1153 mandates that employers limit exposure to respirable crystalline silica to a permissible exposure limit (PEL) of 50 μg/m³ over an 8-hour time-weighted average. If levels reach or exceed the action level of 25 μg/m³, employers must measure silica levels and implement controls (more on this later) to reduce exposure.

Respiratory protection remains one of the most frequently-cited safety violations.

Asbestos

Though banned from most construction products, asbestos still lingers in many older buildings — particularly in insulation, ceiling tiles, and pipe coverings. Disturbing these materials during renovation or demolition can release microscopic asbestos fibers into the air. Asbestos-related health risks include:

• Mesothelioma (A rare and aggressive cancer affecting the lining of the lungs, abdomen, or heart)
• Lung cancer
• Asbestosis (A chronic lung disease that leads to lung scarring and breathing difficulties)

Even minimal exposure over time can lead to fatal illnesses, often diagnosed decades after exposure.

Volatile Organic Compounds

Many construction products, including paints, adhesives, sealants, and coatings, release VOCs as they dry or cure. In confined or poorly-ventilated spaces, these chemicals can build up quickly, causing:

• Eye, nose, and throat irritation
• Headaches and dizziness
• Long-term damage to the liver, kidneys, and central nervous system

While VOC exposure may seem less severe than silica or asbestos inhalation, its long-term effects on workers’ health are undeniable.

Best Practices for Mitigating Respiratory Hazards

Understanding the hazards is only half the battle. Here are some tips to help you develop an effective mitigation strategy:

1. Conduct a Site Assessment

While OSHA regulations set exposure limits, it’s up to employers and safety managers to monitor, test, and mitigate risks accordingly. Before work begins, assess the area for potential airborne hazards. Use specialized air monitoring equipment (such as sampling pumps and photoionization detectors) to test for silica, asbestos, and VOC levels, especially in enclosed or renovated spaces.

2. Implement Engineering Controls

Engineering controls are often the most effective (and most sustainable) way to reduce respiratory hazards on construction sites. Popular options include:

• Wet Cutting and Drilling: This can involve spraying water on surface materials (such as concrete or stone) to keep dust particles from becoming airborne. Some specialized tools have built-in water delivery systems that automatically send water through the blade to suppress dust. These systems are commonly found in concrete saws, tile saws, and masonry cutting tools, where water is fed through a hose or internal reservoir to cool the blade and reduce airborne particles.
• Local Exhaust Ventilation (LEV) Systems: LEV systems capture airborne contaminants at the source and remove them from the work area. These systems are particularly effective for managing dust, fumes, and vapors generated during construction tasks such as welding, grinding, and spray painting.
• Barriers and Containment Systems: Isolate high-risk tasks to designated spaces and use enclosures to contain dust and airborne particles in a controlled environment. Portable isolation booths with built-in ventilation further minimize exposure and prevent harmful contaminants from spreading across the job site.

These controls are particularly important for tasks that create respirable crystalline silica. If silica exposure exceeds the action level (usually half of the PEL), employers must begin air monitoring and consider medical surveillance for affected workers. When levels go beyond OSHA’s PEL, additional steps, such as implementing or upgrading engineering controls, are required.

3. Enforce Administrative Controls

While engineering controls tackle hazards at the source, administrative controls help reduce exposure by modifying how work is organized. These measures are especially useful when engineering controls alone can’t keep contaminant levels below OSHA’s PELs. Common strategies include:

• Job Rotation: Rotating workers in and out of high-exposure areas limits the amount of time any one person spends near respiratory hazards. Plan high-emission tasks (like cutting, grinding, or painting) during shifts when fewer workers are on site, or when natural ventilation is at its peak, such as early morning or late afternoon.
• Restricted Access Zones: Limit access to areas where hazardous materials are handled or disturbed—especially during demolition, asbestos abatement, or confined space work.
• Training and Signage: Provide ongoing training about site-specific respiratory hazards and proper work practices. Post clear signage around high-risk zones to reinforce safety protocols and remind workers to use the appropriate protective gear.

Administrative controls work best with ongoing supervision, strong communication, and consistent enforcement. When combined with engineering controls and personal protective equipment (PPE), they help form a layered approach to respiratory protection, which is especially critical on dynamic job sites where airborne hazards can vary daily.

Respiratory PPE Recommendations

Respiratory PPE should be matched to the specific hazards present—whether that’s silica dust, welding fumes, or chemical vapors. Here are some common types of respirators and their ideal applications:

• N95 Respirators: Lightweight and disposable, N95s are effective in blocking at least 95% of airborne particles that are not oil-based, including general dust, nuisance particles, and some low-level VOCs.
• P100 Respirators: Offering a higher filtration efficiency, P100s block 99.97% of all airborne particles and are recommended for more hazardous exposures, such as asbestos or respirable crystalline silica.
• Full-Face Masks and PAPRs: Powered air-purifying respirators (PAPRs) and full-face masks provide enhanced protection for high-risk environments and are especially helpful for workers with facial hair or who require extended wear in contaminated areas.

In addition to respirators, supplementary PPE like coveralls and shoe covers can shield clothing and skin from dust and other pollutants (especially during demolition or abatement work) and help prevent the spread of hazardous particles to clean areas.

Ensure all respiratory protection is NIOSH-approved and appropriate for the specific hazard identified during your site assessment. And remember, respirator fit is critical, as a poorly sealed mask can render even the most advanced filter ineffective. Offer multiple sizes and styles, and conduct regular fit testing to ensure your team gets the protection they need.

Rick Pedley is the President & CEO, PK Safety (pksafety.com).

[i] https://www.bls.gov/news.release/osh.nr0.htm

[ii] https://www.osha.gov/data/commonstats