Frequently asked questions

Only a laboratory analysis can confirm it. We collect the samples and give you the results before any demolition.

From a few days to a few weeks depending on the area and risk level. The schedule is set out in the quote.

The work area is sealed and kept under negative pressure. Depending on the project, occupants can often stay in other parts of the building.

Yes, it is a frequent mandate. We seal the area, remove contaminated debris, do the final HEPA clean-up and have an air test done before work resumes.

Call us. We carry out the required corrective work (containment, decontamination, clean-up) and document everything to support your request to resume the project.

The price depends on the area, the type of material and the risk level of the work. We provide a free, detailed quote within 24 h, based on your plans, photos or a site visit.

Material that is intact and in good condition releases few fibres. The risk comes when it is drilled, sanded, broken or deteriorating. That is why it must be tested before any work.

Mostly those built or renovated before the 1990s: houses, apartment buildings, schools, offices and industrial buildings.

With a sample analysed in a laboratory. We can take samples before the work starts.

Encapsulation is sometimes possible if the paint is sound and the surfaces will not be disturbed. For renovation or demolition, removal is the better option.

Yes, especially as dust. Sanding, stripping and demolition release particles that can be inhaled or swallowed. Young children and pregnant women are the most vulnerable.

Mostly those built before 1960. It can still be found in buildings built up to 1990, particularly on trim, windows and exterior surfaces.

It depends on the surfaces to treat and the method chosen. We provide a free quote within 24 h.

A small spot on a smooth surface can be cleaned. Widespread growth or mold in porous materials calls for removal by specialists.

Yes. We work 7 days a week, 6 a.m. to 8 p.m., and coordinate with your insurer or contractor.

Always moisture: a leak, water infiltration, condensation or water damage that was not dried properly. The source must be fixed, or mold will come back after remediation.

Not on porous materials such as drywall, insulation or wood: mold grows deep into them. These materials must be removed. Hard surfaces can be cleaned.

The work area is sealed to keep spores from spreading. Depending on the scope, you can often stay in the rest of the building.

Not always, but testing is needed to rule it out. Until then, treat it as if it does.

No. Vacuuming or moving it releases fibres into the house. Removal must be done in a sealed area.

It looks like small, light, shiny granules, grey-brown to gold, poured loose between the attic joists. Only a laboratory analysis can confirm whether it contains asbestos.

As long as it is not disturbed, the risk is low. Removal becomes necessary before work that affects the attic, ceilings or walls. It is also often requested when a property is sold.

For a residential attic, usually one to a few days, depending on the area and access.

Through an assessment of the backfill by a laboratory or engineer. We step in once the diagnosis is made.

We handle demolition and backfill removal. Rebuilding is done by the chosen contractor, and we coordinate the schedule with them.

Star-shaped cracks in the basement or garage slab, a slab that is heaving, whitish powder along the cracks, partitions that warp or doors that stick.

The basement is not accessible during the work, which is noisy and dusty. Depending on the house, it is often possible to stay on the upper floors.

It is hauled away and disposed of at an authorized site. Debris management is included in our quote.

Not in the contaminated area. It stays sealed until the final air test. Depending on the project, work may continue elsewhere in the building.

Through a site inspection and, if needed, dust and material samples analyzed in a laboratory.

From a few days to a few weeks, depending on the area and extent of contamination. The schedule is set out in the quote, provided within 24 h.

Do not move the debris, restrict access to the area and call us. We assess the site and provide a quote within 24 h.

An external, independent laboratory. Its result confirms that work can resume.

It depends on the corrective measures required and on the inspector’s decision. We provide a quote within 24 h and can mobilize a crew quickly, 7 days a week.

The CNESST. Our role is to carry out the corrective work and provide the documents that support your request to resume.

Yes. We are used to the paperwork and to managing a site shut down by the CNESST: work procedures, documents to produce and file follow-up.

Yes. We also handle lead, mold and vermiculite.

It depends on the scope of the order set by the inspector: it may cover one area, one task or the whole site. We help you understand exactly what is covered.

From 0.1% asbestos, based on analysis by an external, independent, accredited laboratory. Without testing, a suspect material is presumed to contain asbestos.

The whole zone is then considered asbestos-containing: every place where that material was installed the same way, at the same time.

With a complete report, we price exactly what has to be removed. Untested materials are either excluded from our quotes or treated as asbestos-containing, which is what prevents surprises and extras mid-project.

Usually a few business days after sampling, depending on the laboratory and the number of samples.

In Quebec, materials likely to contain asbestos must be identified before work that could disturb them.

No. Only those likely to contain asbestos that will be affected by the planned work.

Yes, for the materials and zones already sampled. If new work affects other materials, they will need to be tested in turn.

Yes. We protect adjacent areas and schedule noisy work around your constraints.

Yes. We demolish brick walls and partitions, concrete block and interior masonry, with dust control and debris removal.

We do demolition and decontamination. Rebuilding is done by your contractor, and we coordinate with them.

It is sorted, hauled away and disposed of at authorized sites. Debris management is included in the quote.

We stop work in the affected area, have the material tested and, if it contains asbestos, the same crew continues under asbestos conditions. No need to find another contractor.

It depends on the municipality and the scope of the work. Check with your city or borough before starting.

Drilling makes round openings, for pipes and conduits. Sawing makes straight cuts, for doors, windows or trenches.

No. Diamond drilling is done wet, which captures dust at the source. Water and slurry are collected as the work goes.

Yes. Diamond drilling produces little vibration, and we schedule noisy work around your constraints.

The materials must be tested first. If they contain asbestos, we drill following asbestos work procedures.