Asbestos survey before rewiring and insulating an older house
Example project

- Home
- Vancouver house from the 1940s, with two tall windows in the front room
- Original request
- Rewire the house and blow insulation into the outside walls, opening plaster where needed
- Testing
- Survey by an accredited inspector, about 12 samples of plaster, paint layers, window putty and floors
- Found
- Asbestos in the plaster base coat on the outside walls and in the old window putty
- Clear
- No asbestos in the paint layers, the newer kitchen walls or the floors
- Timeline
- One visit, then the written report in a few days
- Estimated survey cost
- $850
Scope of work
A survey of every material the rewiring and insulation will cut or drill, about 12 samples, lab fees and a written report listing each material, its condition and result. The report is posted at the work site. Opening the plaster under a notice is a separate price.
Project overview
In this example, the owners of a 1940s house in Vancouver plan to rewire it and blow insulation into the outside walls. The electrician and the insulation crew will cut and drill the plaster in many places, so each material is either tested by an accredited inspector or treated as asbestos, and these owners want the test.
The base coat of the plaster on the outside walls and the old window putty are positive. Every opening in those walls is now made under a notice inside plastic, starting with the section between the front windows, and the window putty is left alone because the windows stay.
The goal
The goal is a report that shows which walls need asbestos care, so the rewiring and insulation are planned and priced the right way.
Process
- Before the visit The electrician marks where walls will be opened and drilled.
- Visit Samples from the plaster, paint layers, window putty and each floor layer.
- A few days later Lab results and a written report.
- Then The wall openings are noticed and booked; the report is posted at the site.
Planning right
- Treating a material as asbestos without testing is allowed, but then it must be removed as asbestos.
- The report has to be posted at the site even when every sample is negative.
- Keep the report for at least 24 months, and longer if you can.
- Drilling through positive plaster for insulation still counts as disturbing it.
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