If you are renovating, demolishing, or cutting into a building from before about 1980, assume there is asbestos in it, and assume there is lead paint if it went up before 1978, until testing says otherwise. Both cause diseases that show up decades later: asbestos causes lung cancer and mesothelioma, lead damages your brain, kidneys, and nervous system and rides home on your clothes to your family. OSHA has separate standards for each, and disturbing either without controls is both dangerous and a serious violation. This is federal OSHA in 2026, with EPA rules layered on top for lead paint in homes.
Where they hide
Asbestos was used everywhere before it was phased out, so in a pre-1980 building look for it in:
- Floor tile and the mastic under it
- Pipe and boiler insulation
- Roofing felt and shingles
- Textured "popcorn" ceilings and joint compound
- Cement board, siding, and duct wrapping
Lead paint is common in buildings painted before the 1978 residential ban. The trigger jobs are:
- Sanding, scraping, or torch-cutting painted surfaces
- Cutting or welding painted steel and old pipe
- Demolishing or renovating older housing
The danger from both goes up the moment the material is disturbed. Intact floor tile or painted trim left alone is low-risk; the same material cut, sanded, or torn out puts fibers and dust into the air you breathe.
Test before you disturb, not after
You cannot tell by looking whether a material contains asbestos or lead. Both need testing.
- Asbestos: OSHA requires a survey of the building for asbestos-containing materials before renovation or demolition work begins. A trained inspector samples suspect materials.
- Lead: paint gets tested (XRF or lab analysis) before you disturb it. If you skip the test, OSHA generally expects you to assume lead is present and protect workers accordingly.
Guessing wrong is expensive both ways: you either over-protect a clean job or, far worse, you expose your crew to a hazard you did not know was there.
The OSHA exposure limits
- Asbestos (1926.1101): the permissible exposure limit is 0.1 fiber per cubic centimeter of air, averaged over 8 hours. Regulated asbestos work is split into classes, with Class I (removing sprayed-on fireproofing and pipe insulation) the highest risk and most tightly controlled. Regulated abatement is licensed work in most places, not general-contractor work.
- Lead (1926.62): the action level is 30 micrograms per cubic meter and the permissible exposure limit is 50 micrograms per cubic meter, both over 8 hours. Above the action level, the employer owes workers medical surveillance, blood-lead (biological) monitoring, hygiene facilities to wash up and change, and a written exposure control plan.
These are federal numbers. You cannot judge them by eye, which is why disturbing these materials calls for controls and, often, air monitoring.
Two rulebooks for lead paint
Lead paint in homes is governed by two agencies at once, and you have to satisfy both:
- OSHA protects your workers from lead exposure on any job (the 1926.62 rules above).
- The EPA's Renovation, Repair and Painting (RRP) rule protects the occupants of pre-1978 housing and child-occupied facilities. It requires the firm and the workers to be RRP-certified and to use lead-safe work practices (containment, HEPA cleanup, verification) on covered jobs above a small minor-repair threshold.
So a painter or remodeler working on an old house can need EPA certification even where OSHA air levels stay low. The detail on RRP, including the certification and the size thresholds, lives in the EPA lead-paint guide and Working in Your State, because state licensing varies.
Control the dust and don't take it home
- Contain the work and use wet methods or HEPA vacuums to keep dust and fibers down. Never dry-sweep or use compressed air.
- Respirators and disposable suits where the assessment calls for them, with a proper respirator program.
- Wash and change before you leave. Lead dust on your clothes, boots, and skin goes home and poisons your kids. Hygiene facilities and a clean change of clothes are how you stop that.
- Never torch-cut or grind painted or insulated material without knowing what is in it. Heat turns lead paint into fumes and can release asbestos.
Common questions
How do I know if a building has asbestos or lead paint?
You test. Neither can be identified by sight, so an asbestos survey and lead-paint testing have to be done before you disturb the material. As a rule of thumb, assume asbestos in buildings from before about 1980 and lead paint in anything painted before the 1978 residential ban, until testing proves otherwise. If you skip lead testing, OSHA generally expects you to treat lead as present and protect workers accordingly.
What is the OSHA limit for lead and asbestos?
For asbestos the permissible exposure limit is 0.1 fiber per cubic centimeter of air over 8 hours; for lead the action level is 30 and the permissible exposure limit is 50 micrograms per cubic meter over 8 hours, in 2026. Above the lead action level, workers are owed medical surveillance, blood-lead monitoring, wash-up facilities, and a written control plan. Verify the current figures at osha.gov.
Do I need a license to remove asbestos?
Usually yes. Regulated asbestos abatement is licensed work in most places, not something a general contractor should take on. OSHA divides asbestos work into classes, with the removal of sprayed-on fireproofing and pipe insulation the highest risk and most tightly controlled. Licensing and certification rules vary, so check Working in Your State before touching known asbestos.
Do I need EPA certification to work on lead paint?
Often yes. The EPA's RRP rule requires firms and workers to be certified and use lead-safe practices when disturbing paint in pre-1978 housing and child-occupied facilities above a small minor-repair threshold. That is separate from and on top of OSHA's worker-protection rules. The certification and thresholds are covered in the EPA lead-paint guide, and state licensing varies, so also check Working in Your State.
Why is lead dust dangerous to my family?
Because lead dust settles on your clothes, boots, skin, and tools and travels home, where it poisons children at levels far below what harms adults. Lead damages a child's developing brain and nervous system. That is why the lead standard requires wash-up facilities and a change of clothes before you leave the site: to keep the job's lead on the job and out of your house.
The honest bit
- The asbestos PEL of 0.1 f/cc and the lead action level and PEL of 30 and 50 micrograms per cubic meter are federal OSHA in 2026, under 29 CFR 1926.1101 and 1926.62. Verify current figures at osha.gov.
- The EPA RRP certification and thresholds are federal EPA rules; verify at epa.gov, and check state licensing in Working in Your State. About 22 states also run their own OSHA program and can require more.
- Asbestos abatement and much lead work are licensed, specialized jobs. This is general guidance, not training. If you find or suspect these materials, get testing and a qualified abatement contractor before you disturb anything.
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Keep reading
Templates you might need
Sources
- 29 CFR 1926.62 - Lead · The lead PEL, action level and exposure assessment duties in construction
- 29 CFR 1926.1101 - Asbestos · Asbestos classes of construction work and required controls
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