The Survey That Has to Happen Before Anyone Touches the Building

A strata has tendered a recaulking project on a 1970s concrete building. The contract is signed, the swing stage is up, and on the first morning the contractor asks for the hazardous materials survey before starting removal.

There is no survey. Nobody in the chain, from the council to the consultant to the property manager, raised it during planning. The crew stands down, the access sits idle, and a sampling programme gets arranged at short notice while the schedule burns.

This is a preventable problem, and it happens often enough on Metro Vancouver buildings that it is worth treating as a standard planning item rather than an occasional surprise.

Why the requirement exists

Removing sealant, stripping coatings, cutting into cladding, or tearing off roofing is disturbance of building materials. When those materials contain asbestos or lead, disturbance is what releases them, and workers on the access equipment are the people first exposed.

In British Columbia, the occupational health and safety framework requires that a qualified person inspect a building for hazardous materials before demolition, renovation, or salvage work begins where those materials may be present. The obligation sits with the owner. On a strata building, the owner is the strata corporation, which means the council carries the duty regardless of who is holding the tools.

The requirement is not satisfied by a contractor’s assurance, and it is not something a contractor can self-certify. It needs a qualified hazardous materials consultant taking representative samples and having them analysed by an accredited laboratory.

Where these materials actually turn up

The mental image most people have is of asbestos insulation in a boiler room, which is why envelope work catches them out. The materials that matter on a restoration project are different ones.

Sealants and caulking. This is the one that is most often missed and most often relevant. Asbestos was used as a filler in some older sealant formulations, which means the perimeter joints around windows, the expansion joints between precast panels, and the control joints in a concrete facade may all contain it. A recaulking project removes exactly those joints, by grinding and cutting, at height, in the breathing zone of the technician doing the work. The removal methods described in the post on caulking removal versus cap beads are the ones that generate the dust.

Roofing materials. Older built-up roofing felts, mastics, and flashing cements are recurring sources. A tear-off is the most aggressive disturbance on a typical envelope project.

Parging, stucco, and render. Some older mixes included asbestos fibre. Patching, crack repair, or removal all disturb it, which matters for the work covered in the post on stucco crack repair.

Transite panels. Cement board containing asbestos was used as cladding, soffit, and infill panel material. It is stable when intact and hazardous when cut or broken.

Window glazing putty. Older putty on steel or wood-framed windows can contain asbestos, which becomes relevant on any glazing restoration.

Lead in coatings. Lead was used in exterior paints and primers, particularly on metal. Railings, structural steel, window frames, canopies, and handrails are the usual candidates. Surface preparation by sanding, grinding, blasting, or scraping generates lead dust and triggers its own exposure control requirements, separate from anything to do with asbestos.

The building’s appearance proves nothing

Two assumptions cause most of the trouble.

The first is that a building constructed after a certain year is automatically clear. Product use did not stop cleanly on a single date, and stock manufactured earlier continued to be installed afterwards. A firm cutoff year is a planning convenience rather than a guarantee.

The second, and more damaging, is that a renovated building is clear because the visible material is new. A 1960s building reclad in the 1990s may have original sealant, original roofing layers, or original parging still in place behind or beneath the newer work. The recladding did not necessarily remove what was there; it may have covered it. That is precisely what a restoration project then uncovers.

The renovation history matters more than the construction date, and neither one substitutes for a survey.

Reading the report properly

A survey report identifies each material sampled, where it was taken from, and what the laboratory found. That part is straightforward.

The section that deserves equal attention is the limitations. A surveyor can only sample what they can reach, and a building under occupancy with finished interiors and closed cavities presents real access constraints. Where the report states that a cavity, an elevation, or a concealed assembly was not accessed, that area has not been cleared. It has been excluded.

This matters because a contractor opening an unsurveyed cavity mid-project is back in the same position as a contractor with no survey at all. The report should say clearly what was excluded, and the project plan should say what happens when the crew reaches those areas. Usually that means stopping and sampling before proceeding, which is manageable when it is anticipated and expensive when it is not.

Timing: before the tender, not after

The single most useful decision a council can make is to run the survey before the project goes out for pricing.

A contractor bidding on removal work needs to know what they are removing. Asbestos-containing material has to be removed under the risk classification and procedures set out in the regulation, which determines containment, worker protection, notification, and disposal. Those requirements change the labour, the equipment, the sequence, and the duration of the work.

When bidders do not know, one of two things happens. Either every price carries a qualification that makes it an estimate rather than a price, or the bidders each guess differently and the tender becomes impossible to compare fairly. Neither outcome serves the strata, and both undermine the scope discipline discussed in the post on envelope tender scope of work.

Running the survey first converts an unknown into a defined scope item that every bidder prices the same way. That is worth more than the survey costs.

The other timing trap is the special levy. Where a project is funded by a levy, the authorized amount needs to cover abatement if it is required. A resolution written before the survey, for a base scope that excludes it, leaves no room when the results come back. That is the same problem described in the post on contingency allowances in envelope budgets, and it lands harder here because abatement is not optional once the material is identified.

What finding something actually means

Finding asbestos does not cancel a project. It reclassifies it.

The regulation sets out risk classifications for asbestos work, and the classification determines the controls. Higher-risk work requires more containment, more stringent worker protection, notification to the regulator before work begins, and specific waste handling and disposal. The work then proceeds under those controls.

For a strata, the practical consequences are a longer schedule, a higher cost, more visible containment on the building, and more communication needed with residents who will see the setup and ask about it. That communication is easier when the council knew in advance and can explain it as a planned step, which is the difference the resident communication approach in the post on communicating restoration work to residents is built around.

Most of the cost difference between planned abatement and discovered abatement sits in the stopped schedule, the idle access equipment, the emergency sampling, the revised contract, and in some cases another owners’ meeting to authorize funds. All of that is avoidable with a survey done at the right time.

A workable sequence

For a strata council planning envelope work on an older building, the order that avoids most of the trouble looks like this.

Establish the building’s construction and renovation history from whatever records exist, including any previous hazardous materials reports, since a survey done for an earlier project may still cover some of the same materials.

Engage a qualified hazardous materials consultant to survey the materials that the planned work will disturb, and make sure the scope of the survey matches the scope of the project rather than some general assessment of the building.

Read the limitations and agree what happens at every area the survey could not access.

Include the findings in the tender documents so bidders price identical scope, and carry abatement in the budget and in the funding resolution.

Where results come back clear, keep the report. It is evidence for the next project and it answers the same question again in five years without new sampling.

None of this is complicated. It is a scheduling and sequencing discipline, and the cost of getting it wrong is paid at the worst possible moment in a project, which is the reason it belongs at the front.

Sources and further reading

• WorkSafeBC, Occupational Health and Safety Regulation, Part 20 (Construction, Excavation and Demolition) hazardous materials inspection requirements, referenced 2026
• WorkSafeBC, Safe Work Practices for Handling Asbestos, referenced 2026
• WorkSafeBC, Lead-Containing Paints and Coatings: Preventing Exposure, referenced 2026
• Government of British Columbia, Hazardous Waste Regulation, disposal requirements, referenced 2026
• Allweathercoating project planning records, Metro Vancouver, 2026