- Homes built before about 1980 can contain asbestos in many materials. You cannot tell by looking.
- Never remove suspected asbestos yourself. Testing and removal must be done by certified professionals.
- In the Bay Area, demolition generally requires an asbestos survey and an air district notification before work starts.
Asbestos was used in thousands of building products until the late 1970s because it is strong and fire resistant. When those materials are disturbed during a remodel or demolition, microscopic fibers can be released and inhaled, which is linked to serious lung diseases. If you own an older Bay Area home and plan to remodel or demolish, here is what you need to know.
Where asbestos hides in older homes
- Popcorn and acoustic ceiling texture
- Vinyl floor tiles and the adhesive underneath
- Drywall joint compound and some plasters
- Pipe and duct insulation, and old furnace wrap
- Roofing, siding and cement board panels
- Window putty and some caulks
Materials in good condition and left alone are generally not a hazard. The risk comes when they are cut, sanded, broken or demolished.
Step 1: Get a survey from a certified consultant
The only way to know is lab testing of samples taken by a certified asbestos consultant. For demolition, the Bay Area air district generally requires a survey of the building before work begins, and a notification to the district before demolition starts. Your demolition contractor can tell you what applies to your project and help you schedule it.
Step 2: Hire a certified abatement contractor
If asbestos is found, it must be removed by a contractor certified for asbestos work in California. Check the contractor's license and certification on the CSLB website and ask for references. A proper abatement includes:
- Sealing off the work area with plastic sheeting and negative air pressure
- Wetting materials to keep fibers out of the air
- Workers in respirators and protective suits
- Sealed, labeled bags and disposal at an approved facility
- Clearance testing before the area is reopened
Step 3: Demolition after clearance
Once the abatement contractor has removed the asbestos and the area has passed clearance, the demolition can proceed safely. Building the survey and abatement into your schedule from the start avoids weeks of delay.
Why you should never DIY asbestos
Scraping a popcorn ceiling or pulling up old tiles yourself can spread fibers through the whole house and onto your clothes. Fines for improper removal and disposal can also be significant. It is one job that should always go to certified professionals.
For the full demolition process, read our residential demolition guide or see our house demolition service.
Frequently asked questions
Does Bay Demo remove asbestos?
No. Asbestos abatement must be done by a certified abatement contractor. We coordinate with certified firms when a survey finds asbestos, and we start demolition after the material is cleared.
How do I know if my home has asbestos?
You cannot tell by looking. Homes built before about 1980 can contain asbestos in many materials. Only lab testing of samples taken by a certified asbestos consultant can confirm it.
