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90 mg/kg Rule: What Canadian Homeowners Must Do About Lead Paint

By HMJ Contracting · Ottawa, ON

Wet removal of paint from old trim

Federal rules limit lead in consumer paints to 90 mg/kg, but many older Canadian homes still contain lead in existing paint. That rule governs products sold today, not what is already on your walls. If your home is older, assume lead paint may be present, test before you disturb it, and hire qualified help for removal. Health Canada and the Justice Laws Website are the two authorities worth checking first.

TL;DR:

  • Older homes built before 1960 are highly likely to contain lead-based paint, especially if paint is chipping, peeling, or on friction surfaces like windows and doors.
  • The federal lead paint rule only applies to products sold today, not existing paint, so homeowners are not legally required to remove lead paint in longstanding structures.
  • Proper testing by accredited labs or qualified inspectors provides the only reliable way to confirm lead presence, with XRF testing offering instant results and lab analysis providing defensible evidence.
  • Lead paint disturbance during remodeling requires strict safety protocols, including wet methods, HEPA filtration, containment, and professional clearance testing after work, especially for extensive projects.
  • Municipal disposal rules necessitate sealing and labeling lead paint waste as hazardous, with homeowners encouraged to hire licensed professionals for removal and proper disposal documentation.
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Table of Contents

What federal law requires: Surface Coating Materials Regulations and scope

Canada’s Surface Coating Materials Regulations (SOR/2016-193) set the legal limit for lead in paint sold across the country. The rule states that a surface coating material cannot contain more than 90 mg/kg of total lead when the dried sample is tested using good laboratory practices. That threshold applies at the point of manufacture and sale, meaning it controls what goes into cans on store shelves, not what is already dried onto the trim in a century home in the Glebe or a farmhouse near Renfrew.

The regulation covers surface coating materials broadly: interior and exterior paints, varnishes, lacquers and similar products intended for use on furniture, toys, equipment and buildings. It applies to manufacturers and importers who bring these products into the Canadian market, and it carries limited exceptions for specified uses, along with warning requirements for a small number of permitted applications that exceed the general limit.

Here is the part homeowners often get wrong: this federal rule does not require anyone to remove lead paint from an existing home. It is a product-safety standard, not a remediation mandate. A house built in 1955 with lead-based paint on its baseboards is not in violation of anything. The law was written to stop new lead paint from entering commerce, not to force retroactive cleanup of paint that predates the rule by decades.

That distinction matters when you are planning a renovation or a sale. Nothing in the federal regulation obligates a homeowner to test, disclose, or remove lead paint simply because it exists. The obligations that do apply come from other sources: provincial occupational health rules that kick in once you start disturbing the paint, municipal disposal bylaws once you generate waste, and general duty-of-care principles that apply to landlords and sellers. We will walk through each of those, but the starting point is simple. The federal limit tells you what is legal to buy today. It says nothing about what you must do with paint that has been on your walls since before most of us were born.

For a home built before the 1990s, the practical reality is that lead paint may still be there, intact, doing no harm until something disturbs it: a renovation, a window that sticks and grinds against its frame, or a toddler chewing on a windowsill.

Who enforces and where to check: federal versus provincial responsibilities

Two different levels of government handle this issue, and knowing which one answers your question saves time. For homeowner-facing guidance on lead paint risks, testing and health effects, Health Canada is the primary resource. For the legal text of the product limit itself, including the exact wording of exceptions, the Justice Laws Website hosts the full regulation.

Provinces take over once work begins on a building. Occupational health and construction rules fall under provincial jurisdiction, which is why Ontario, for example, treats lead as a designated substance under its construction health and safety framework. If you are in another province, expect a similarly structured but separately administered set of rules, since occupational exposure limits and designated-substance requirements are set provincially rather than federally. Ontario’s approach is useful as an illustration of how these rules typically work, even for readers elsewhere in the country, but always confirm the specifics with your own provincial labour ministry.

For testing, two bodies matter:

  • The Standards Council of Canada accredits testing laboratories and can help you confirm a lab meets recognized standards.
  • The Canadian Association for Laboratory Accreditation maintains a directory of accredited labs that perform paint-chip and related analyses.

Both are worth a quick search before you send a paint sample anywhere. An accredited lab result carries weight if you later need to show due diligence to a buyer, tenant, or contractor. A test from an unaccredited source may leave you with a number nobody trusts.

How to tell if your home contains lead paint and how to test

Age is the fastest screening tool you have. Health Canada guidance breaks it down clearly: homes built before 1960 probably contain lead-based paint somewhere. Homes built between 1960 and 1990 may have it, particularly on exterior surfaces, where lead-based formulations lingered longer than they did indoors. Homes built after 1990 are unlikely to contain lead in their consumer paints, since the phase-out was well underway by then.

Visual clues can raise your suspicion before you test anything. Watch for:

  • Chipping, peeling or alligator-cracked paint, especially on older layers.
  • Multiple paint layers visible where a chip has flaked away, a sign of decades of repainting.
  • Friction surfaces such as windows, doors and stair treads, where rubbing wears paint down to dust over time.

Once you suspect lead paint, two testing routes give you a reliable answer. The first is laboratory paint-chip analysis: you or a professional collect a small sample down to the substrate, seal it, and send it to an accredited lab. The second is X-ray fluorescence, or XRF, testing performed on-site by a qualified inspector using calibrated equipment. XRF gives instant readings without removing paint, which makes it useful for larger homes with many surfaces to check.

Store-bought swab test kits exist, and they can flag lead qualitatively, but they are not a substitute for lab analysis or professional XRF work when you need a defensible number, for instance before a renovation permit or a sale. Treat a home swab test as a first pass, not a final answer.

Swab testing an older painted windowsill

Before sending a sample, call the lab. Ask what substrate information they need, how they want the chip packaged, and what turnaround time to expect. A five-minute phone call saves you from resubmitting a sample because it was collected the wrong way.

Pro Tip: Photograph each sample location before you collect it, and label the bag with the room and surface. It is easy to forget which chip came from which windowsill once you have six bags in a box.

Deciding whether to leave, encapsulate, or remove lead paint

Not every lead paint discovery calls for a demolition crew. Health Canada guidance is direct on this point: intact, inaccessible lead paint often carries less risk than a poorly managed removal job. Disturbance creates the hazard. A sealed, unbroken paint surface behind a bookshelf is a very different situation from flaking paint on a windowsill a toddler can reach.

Here is a practical order of decisions:

  1. Assess condition and location. Intact paint in a low-traffic, low-access area, such as inside a closet or behind fixed furniture, generally poses the lowest immediate risk and may be safest left alone.
  2. Consider encapsulation for accessible but stable surfaces. Encapsulation means sealing the existing paint under a specialized coating or covering designed to prevent chips and dust from becoming airborne. It works well on walls, trim and other surfaces that are structurally sound but exposed to daily contact. Our guide on safe lead paint encapsulation walks through the practical steps for homeowners weighing this option.
  3. Move to removal or abatement when disturbance is unavoidable. If paint is already chipping, if the surface is in a room where children spend time, or if a planned renovation will sand, scrape or demolish the surface, removal becomes the safer long-term choice.

The risk with removal is not the goal itself, it is the method. Dry sanding, using a heat gun, or scraping without dust containment can turn a manageable amount of lead into a cloud of fine dust that settles into carpets, HVAC systems and nearby rooms, sometimes making the exposure worse than leaving the paint alone. This is the single most common mistake homeowners make: reaching for a sander before understanding what they are releasing.

Safer removal methods rely on wet techniques, which keep dust from becoming airborne, combined with HEPA-filtered vacuums and controlled containment of the work area. For anything beyond a small, contained spot, this is work for a licensed abatement contractor rather than a weekend project. Our comparison of lead abatement versus renovation approaches breaks down when a homeowner can reasonably manage a small job and when it is time to call a professional.

Pro Tip: When in doubt, choose the option that disturbs the paint least. Covering a stable surface is almost always cheaper and safer than an unplanned removal that spreads dust through the house.

Renovation and construction compliance: lessons from Ontario’s designated-substance rules

Renovation work changes the legal picture. In Ontario, lead is classified as a designated substance under the Occupational Health and Safety Act, and section 30 requires project owners to disclose known or suspected designated substances, including lead, to anyone bidding on or performing the work. That obligation exists whether the job is a full gut renovation or a single window replacement, and it shapes how contractors quote, staff and plan the project.

Ontario’s construction guidance sorts lead work into three categories, and the classification drives everything that follows:

  • Type 1 work involves minimal disturbance, such as removing intact components without cutting or sanding, and carries the lightest control requirements.
  • Type 2 work involves moderate disturbance, like power-sanding a limited area, and requires more containment and respiratory protection.
  • Type 3 work involves extensive disturbance, such as large-scale demolition or abrasive blasting, and triggers the most stringent controls, including negative-pressure enclosures.

Ontario also sets an inorganic-lead occupational exposure limit of 0.05 mg/m³ as an 8-hour time-weighted average, which is the benchmark that respirator selection and containment decisions are built around.

Underlying all three classifications is a hierarchy of controls, and it explains why a simple dust mask is rarely enough on its own. The preferred order of controls runs from eliminating the hazard, to engineering controls like wet methods and HEPA-filtered dust collection, to administrative controls like scheduling and signage, with personal protective equipment as the last line of defence rather than the first. Wet methods keep lead from becoming airborne in the first place. HEPA filtration captures what dry work would otherwise release. Negative-pressure enclosures stop contaminated air from migrating to the rest of the home.

The detail that catches homeowners off guard is scale. A job does not need to be large to trigger formal requirements. Sanding a single door casing in a pre-1960 home can qualify as Type 2 work under Ontario’s framework if it involves power tools. That is why a written hazard-control plan, even for a modest job, protects everyone involved: it documents the classification, the controls used, and who is responsible for what, which matters if a dispute or a health question ever comes up later.

Safe work practices, cleanup and how to choose a qualified contractor

The right work methods make the difference between a contained lead job and a contaminated house. At minimum, require:

  • Wet methods wherever the work allows, since damp surfaces keep dust from becoming airborne.
  • HEPA-filtered vacuums for cleanup, never a standard shop vacuum, which pushes fine particles right back into the air.
  • Negative-pressure containment for larger jobs, so contaminated air does not spread to the rest of the home.
  • No dry sanding, no open flame paint stripping, no compressed-air cleaning, all of which liberate lead dust rather than controlling it.

When you are hiring for the job, ask direct questions before signing anything:

  1. Can you show proof of lead-specific training or licensing for abatement work?
  2. Will you provide a written hazard-control plan before starting, including the job classification and the controls you intend to use?
  3. Do you test for clearance after the work, and will you provide a lab report showing results below applicable screening levels before we reoccupy the space?
  4. Can you show a sample waste disposal receipt or manifest from a past job?

A contractor’s answers, or lack of them, tell you most of what you need to know. Watch for red flags: a vague scope of work with no mention of containment, reliance on heat guns or visible dry sanding, no HEPA equipment on site, and no offer of a written clearance report once the job wraps up. These are signs that the crew is treating lead paint like ordinary drywall dust, which it is not.

For homeowners managing the process themselves, a short checklist helps keep the job on track: confirm the classification of the work before it starts, insist on a written plan, keep children and pregnant occupants out of the work zone for the duration, and do not treat the space as clear until you have a lab report in hand. Our guide to choosing between abatement and renovation approaches covers the practical side of vetting contractors for jobs of different sizes.

Pro Tip: Ask for the clearance report in writing before the final invoice is paid. A verbal “it looked fine when we left” is not the same as a lab result.

Waste handling and disposal: municipal expectations

Lead paint chips and dust do not go in the regular garbage bin without preparation. Seal debris in heavy plastic bags or covered containers, and label them clearly as hazardous waste so nobody handling the bin later is caught off guard. Keep waste covered and out of reach of children and pets until it can be dropped off or collected properly.

Municipal rules on hazardous waste vary from one city to the next, and Ottawa’s household hazardous-waste program will not necessarily match the rules in a neighbouring municipality or in Renfrew County. Always check your local municipality’s instructions before assuming a drop-off depot will accept lead-painted debris the same way it accepts old paint cans.

If you hire a contractor for removal, ask them to handle disposal and provide documentation. A disposal receipt or manifest confirms the waste went to an appropriate facility rather than into a curbside bin, and it gives you a paper trail if a future buyer, tenant or inspector ever asks how the material was handled.

A contractor’s perspective on lead paint safety in older Ottawa homes

Lead paint work is one of those jobs where the gap between “looks fine” and “is actually safe” is invisible without testing. HMJ Contracting handles licensed lead, asbestos and mould abatement alongside renovation work across Ottawa and the surrounding region, and the approach we bring to a lead job follows the same principles laid out above: written hazard-control plans before work starts, HEPA containment and wet methods during the job, and clearance testing before anyone calls a room finished.

We provide detailed, itemized quotes for containment, testing and disposal before work begins, so homeowners know what to expect. That transparency, combined with a commitment to quality work and customer satisfaction, is the standard held on every job, whether it is a single contaminated window or a full-home renovation that uncovers lead paint mid-project.

If a test comes back positive and you want a professional assessment of your options, our abatement services page outlines how we scope and quote lead removal work for Ottawa-area homes.

— Jason

Sources

FAQ

Is lead paint allowed in Canada?

Lead paint sold for consumer use is restricted, not banned outright: the Surface Coating Materials Regulations cap total lead at 90 mg/kg in surface coating materials sold today. Paint already on the walls of an older home is not illegal to leave in place, since the rule governs new products, not existing surfaces.

What years do you have to worry about lead paint?

Health Canada guidance says homes built before 1960 probably contain lead-based paint, homes from 1960 to 1990 may have it, particularly on exterior surfaces, and homes built after 1990 are unlikely to contain lead in their paint. Testing is the only way to know for certain in any of these age ranges.

What if I accidentally scraped lead paint?

Stop work immediately, leave the area, and avoid sweeping or vacuuming with a standard vacuum, since that spreads fine dust further. Dampen the debris to limit airborne particles, seal it in a container, and consider a professional cleaning and clearance test before returning to normal use of the room, since Health Canada notes there is no known safe level of lead exposure for children.

Can I live in a house that has lead paint?

Yes, and most Canadians in older homes already do without harm, since intact, undisturbed lead paint is generally lower risk than paint that is chipping or being actively disturbed. The concern arises from dust and chips, particularly around children, so keeping surfaces intact or properly encapsulated, and testing before any renovation, is the practical path to staying safe.

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