Vermiculite and Asbestos in a Quebec Home

Grey-brown granules with a faint sheen, poured loose between the attic joists: that is often all a buyer sees through the access hatch. The material has a name, vermiculite, and a question attached to it: does it contain amiante (asbestos)? Nobody can answer by looking, and that is exactly where decisions go wrong.

Vermiculite and amiante in a Quebec house: the material and the years

The Quebec government describes vermiculite as an insulation “that comes in the form of granules whose colour ranges from silver-gold to grey-brown”, once used “to insulate the attics (attics, attics with an access hatch, mansards, etc.) of houses”. Then comes the sentence that counts: “Certain vermiculite insulations sold between 1920 and 1990 may contain amiante fibres.”

The origin is geological. Santé Canada (Health Canada) traces the source to “vermiculite from the Libby mine in Montana (U.S.) from the 1920s until 1990”, sold “notably under the Zonolite name”. The deposit also contained amiante, and the Government of Canada names the form involved: tremolite.

Two markers frame the question here. The construction industry used these materials “mainly between the 1930s and 1990”, so they can turn up in residential buildings “built or renovated in that period”. And the federal ban on selling, importing and using amiante only dates from December 30, 2018. A 1962 house and a 1988 house therefore raise the same question. The CNESST adds the detail that ruins any visual diagnosis: “The presence of amiante is rarely indicated on a material that contains it.”

Only the analysis of a sample settles it, never a glance into the attic

Quebec regulation reverses the burden. The Règlement sur la santé et la sécurité du travail (RSST, Quebec’s occupational health and safety regulation) presumes that materials likely to contain amiante do contain it, and there are only two ways to show otherwise (section 69.4, extended to materials by section 69.12): verifiable documentary information, such as a technical data sheet, or a sampling report covering a sufficient number of representative samples.

The threshold is a number: a material contains amiante “when the amiante concentration is at least 0.1%” (section 69.2). The analysis follows a method from the IRSST’s Guide d’échantillonnage des contaminants de l’air en milieu de travail (its workplace air contaminant sampling guide), and the laboratory “must take part in an interlaboratory quality control program” (section 69.5). The report has to name the person responsible and their qualification, locate each sample, state the method and identify the laboratory (section 69.7). An email saying “it was tested” is not a report.

Who takes the sample? The Quebec government asks that the check be done by a qualified contractor, “who will confirm the presence of amiante and determine whether certain materials need to be analyzed”, or by a specialized laboratory, because the visual inspection “is not simple to do yourself”. If in doubt, treat the material as though it contains amiante.

Undisturbed, or disturbed: two situations the law does not treat alike

It is the fibres in the air that create the risk. The Quebec government writes that “materials that contain amiante and are in good condition do not release fibres into the air and are therefore generally not dangerous”. Santé Canada adds that “the best way to reduce the risk of exposure to amiante is to avoid disturbing the insulation”.

Conversely, a friable material or one in poor condition releases fibres, and sawing, drilling, cutting, sanding or breaking it releases them too. The diagram of household amiante sources published by the Quebec government classes vermiculite among the “blown, friable, loose fill insulation”.

For a suspect attic, the official measures are concrete: limit access, inform anyone who has to go up there, store nothing in it, seal the cracks between the ceiling and the attic, caulk the hatch and the perimeter of light fixtures, and “never try to remove the insulation yourself”. For your own situation, public health authorities and a qualified professional are the ones who answer.

What the law requires of a contractor before the work

Before work likely to generate dust, the employer “must check for the presence of amiante in the materials and products likely to contain it” (section 69.11 of the RSST) and, on a construction site, “determine the types of amiante present in the materials” (section 3.23.3 of the Code de sécurité pour les travaux de construction, the construction safety code). Removing friable materials containing amiante is classed as high risk, with two lighter regimes depending on the volume of debris.

Two obligations change a project’s calendar. The principal contractor must send the CNESST a written notice of opening of the site at least 10 days before activities begin, and for an amiante removal that notice must state “the methods and processes used, along with an attestation that a training and information program exists” (section 2.4.1). The employer must also keep a safe amiante management register (section 69.16). The CNESST applies zero tolerance: “Should any of these rules be breached, the CNESST will halt the work and those at fault will be liable to penal proceedings.”

Keep the scope of these sections in mind: they target the employer and the principal contractor, not the owner tinkering on his own at home. The official instruction to a private individual remains not to do this work yourself.

Remove, enclose or leave: the effect on a renovation project

When a material is likely to emit amiante dust, the options set out are to remove it, to enclose it entirely in a permanent structure that is tight to fibres, to coat or impregnate it with a binder, or to cover it with a tight material (section 69.9). One rule is not negotiable: before a demolition, these materials must be removed (section 3.23.3.2).

Translate that into a project. Adding insulation on top, finishing a room in the attic, installing recessed light fixtures, running wires: each of those touches the attic. A project that does not touch it is a project whose budget does not move.

The cost. No official source consulted lets me put a figure on a vermiculite removal in Quebec, so I will not give you an amount. What the sources do let you demand, yes: a written description of the work stating the services, the costs, the timelines, the insurance and the warranties. And this, which comes as a surprise: “in Quebec, there is no official accreditation or certification program for the professionals who can work on sites containing amiante”. Failing that, check the contractor’s licence in the Registre des détenteurs de licence de la Régie du bâtiment (the RBQ licence holders register). That budget comes on top of the costs already planned at purchase, which the closing costs calculator works out for you.

What the seller must declare about vermiculite

The mandatory Déclarations du vendeur sur l’immeuble (the seller’s declarations form) names vermiculite twice, at D7.4 and at D8.5, and an amiante expert assessment gets declared at D13.2. The form is taken apart in the seller’s declaration in Quebec.

One detail goes unnoticed. D8.5, on the type of insulation in the attic, offers a “do not know” box. D7.4, which asks whether materials that may contain amiante have ever been used, does not: there is “yes” and there is “no”. A seller who has never had his attic analyzed is therefore answering a question of fact he does not know. The defensible answer goes through section D15.

On the buyer’s side, the issue is the warranty. Éducaloi points out that a defect is latent if it is not apparent, if the buyer did not know about it and if it existed at the time of the purchase, and that the examination expected of a buyer “must be serious, attentive and prudent”. Visible, declared vermiculite is therefore not a latent defect, and declared but never analyzed vermiculite is no guarantee that all is well. The recourses are detailed in vice caché in Quebec.

Vermiculite and amiante: the promise to purchase, the lender, the insurer

The OACIQ is clear on the broker’s role: the form helps him meet his duty to verify, he must disclose any doubt about a factor that could affect the transaction, and he can advise adding conditions to the promesse d’achat (promise to purchase). Vermiculite calls for the same reflex: an expert assessment condition, a realistic period to take the sample, run the analysis and receive a written report, and a clear outcome if the result comes back positive.

One honest clarification to close. No official source consulted lets me claim that a Quebec lender automatically refuses to finance a house insulated with vermiculite, or that an insurer refuses to cover it. What is verifiable is that proof of insurance remains the item that derails a transaction on the last day, for the reasons listed in hard to insure home in Quebec. Call your insurer with the address and the year of construction before you draft.

Frequently asked questions

Can I take a sample myself and send it to the laboratory? The Quebec government asks that the check be done by a qualified contractor or by a specialized laboratory, and writes that you should never carry out the work yourself. None of the sources consulted recommends sampling by the owner.

Does all vermiculite contain amiante? No. The Quebec government writes that “certain” insulations sold between 1920 and 1990 may contain it. But the regulation presumes amiante is present until a technical data sheet or an analysis report shows otherwise, with a threshold of 0.1%.

The seller ticked “no” at D7.4. Is that settled? It tells you what the seller believes he knows, not what the insulation contains. Ask whether an analysis has ever been done, which is what D13.2 covers, then ask for the report. A “no” with no report is not a laboratory result.

To round this out, read the home inspection checklist and walking away: seven red flags.

A house you like, with vermiculite in the attic? Write to me before you draft your promise to purchase: we put in the right expert assessment condition and the right period, with the documents to back it up.

Georges Matar

Residential Real Estate Broker · RE/MAX DU CARTIER INC.

Contact Georges