When it comes to workplace safety in Ontario, there are two major training pillars that every employer and worker should be aware of — Working at Heights (WAH) and WHMIS (Workplace Hazardous Materials Information System). While these are distinct programs, they intersect more than you might think, especially on construction sites and in industrial environments.

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Why Both WAH and WHMIS Matter

Both Working at Heights training and WHMIS certification are mandatory under Ontario law in many workplaces. Together, they protect workers not only from fall-related injuries but also from hazardous substances that may be present while working at elevation.

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Fall Hazards Aren’t the Only Concern

When we think about Working at Heights, we often picture scaffolding, ladders, harnesses, and guardrails — and those are certainly critical components. But if you're working in an environment where hazardous materials are stored or used, such as roofing adhesives, sealants, or solvents, then WHMIS training becomes just as important.

For example, a roofer or maintenance worker may be exposed to flammable vapours at heights, requiring knowledge of safe handling procedures and the use of proper PPE. In these cases, WHMIS supports Working at Heights by helping workers understand:

• How to read Safety Data Sheets (SDS)

• Proper labeling of chemicals

• The use of PPE that protects against both fall risks and chemical exposure

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The Role of PPE in Both Trainings

Working at Heights training emphasizes the use of personal protective equipment such as:

• Harnesses

• Lanyards

• Anchor points

WHMIS also includes instruction on PPE — but focuses on protection from chemical hazards, such as:

• Respirators

• Gloves

• Eye protection

When combined, these training programs ensure that workers understand not only how to stay safe while elevated but also why proper gear matters in relation to the environment they’re working in.

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Employer Responsibilities Under Ontario Law

Employers in Ontario have a legal obligation to ensure that all employees working at elevations of 3 metres or more, or those exposed to fall hazards, complete WAH training approved by the Chief Prevention Officer. In addition, WHMIS 2015 training is required for anyone who works with or around hazardous materials.

These obligations include:

• Keeping valid training records

• Offering refresher training when needed

• Performing risk assessments for both physical and chemical hazards

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Holmes Safety Training Covers Both

At Holmes Safety Training, we offer Chief Prevention Officer–approved Working at Heights courses along with comprehensive WHMIS training — both designed to ensure compliance and build confidence. Whether your staff are in construction, property management, industrial maintenance, or facility services, we can customize training to match the real-world environments your workers face.

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Why Combine These Trainings?

Bundling Working at Heights with WHMIS training is not only time-efficient but ensures your workers are fully equipped to manage multiple layers of job-site risks. This combined approach helps:

• Reduce workplace incidents

• Increase legal compliance

• Improve hazard recognition

• Promote a proactive safety culture

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Book Your Training Today

Don’t wait until an incident forces you to review your safety procedures. Equip your team with the training they need to stay safe, compliant, and confident. Holmes Safety Training serves Ottawa, Kingston, Cornwall, and beyond with onsite and classroom options for both Working at Heights and WHMIS.

Contact us today to learn how we can help your team meet Ontario’s safety standards with trusted, hands-on instruction.