Renovation Safety: 3 Things DIYers Should Do Before Starting 

Before sanding a wall, removing flooring, opening a ceiling, or swinging a demolition hammer, determine what materials the project may disturb. 

Renovation work can release lead-contaminated dust, asbestos fibers, mold spores, and other particles into the air. Once those contaminants spread beyond the work area, cleanup may become more difficult and expensive—and occupants may be unnecessarily exposed. 

Before beginning a DIY renovation: 

• Identify and test potentially hazardous materials.
• Use the correct work practices—or hire a qualified professional.
• Clean and verify the area before allowing normal occupancy.

Do not disturb a material that may contain asbestos or lead until you understand the risk and the requirements that apply to your project. 

What Should You Check Before Renovating? 

Take a closer look before working around: 

• Chipping, peeling, or deteriorated paint 

• Painted surfaces in a home built before 1978 

• Pipe or boiler insulation 

• Old flooring or flooring adhesive 

• Ceiling tile or textured coatings 

• Plaster, joint compound, or cement board 

• Vermiculite attic insulation 

• Musty odors or visible mold 

• Water stains, leaks, or damp building materials 

• Unidentified dust, insulation, or debris 

• Materials that will be sanded, drilled, cut, scraped, or demolished 

You generally cannot determine whether paint contains lead or a building material contains asbestos simply by looking at it. Testing before work begins can help prevent accidental contamination. 

Tip 1: Identify Potential Hazards Before You Disturb Them 

Check for Lead-Based Paint 

Homes built before 1978 are more likely to contain lead-based paint because the federal government banned consumer use of lead-containing residential paint that year. 

Lead paint is most hazardous when it is deteriorating or disturbed. Renovation activities such as sanding, scraping, drilling, demolition, and window replacement can create fine lead-contaminated dust that spreads onto floors, furniture, toys, clothing, and other surfaces. 

Lead-based paint and lead-contaminated household dust remain major sources of lead exposure among children. Approximately 29 million U.S. housing units have lead-based-paint hazards, according to the CDC. 

Before disturbing painted surfaces in a pre-1978 home, consider: 

• Hiring a certified lead inspector or risk assessor 

• Having the affected components tested 

• Assuming the paint contains lead and using lead-safe practices 

• Hiring an EPA Lead-Safe Certified renovation contractor 

The federal Renovation, Repair and Painting Rule generally applies to paid contractors working in pre-1978 homes and child-occupied facilities. It does not ordinarily impose the same requirements on homeowners renovating their own residence, but the EPA recommends that DIYers follow lead-safe practices or hire a certified contractor. State and local requirements may impose additional obligations. 

Check for Asbestos-Containing Materials 

Asbestos may be present in many older and some newer building products, including: 

• Pipe and boiler insulation 

• Floor tile and sheet flooring 

• Flooring mastics and adhesives 

• Ceiling tile 

• Plaster and joint compound 

• Textured wall or ceiling coatings 

• Cement board 

• Roofing and siding products 

• HVAC insulation 

• Fireproofing 

• Vermiculite attic insulation 

Asbestos-containing material that is intact and left undisturbed may not pose an immediate risk. Cutting, drilling, sanding, breaking, or removing it can release microscopic fibers into the air. 

If you suspect that a material contains asbestos: 

• Stop work

• Do not drill, cut, scrape, sand, break, or sweep it 

• Keep people away from the area 

• Do not collect a sample yourself 

• Contact a properly trained and certified asbestos inspector 

A disposable dust mask or ordinary N95 does not make asbestos removal a safe DIY project. Proper asbestos work may require regulated containment, specialized respiratory protection, decontamination procedures, air monitoring, and licensed abatement professionals. 

In New York, building owners are generally required to determine whether asbestos is present before renovation, remodeling, repair, or demolition work that will disturb building materials. The required survey must be completed by a certified asbestos inspector. 

Check for Mold and Moisture 

A musty odor, staining, peeling paint, warped materials, or recurring condensation may indicate a moisture problem. Mold may also be hidden behind drywall, beneath flooring, above ceilings, or around plumbing and HVAC equipment. 

The most important step in controlling mold is correcting the source of moisture. Without repairing the leak, condensation problem, or humidity condition, mold is likely to return. 

Before opening an area with suspected hidden mold, consider whether the project involves: 

• A large or widespread area 

• Long-term water damage 

• Sewage or contaminated floodwater 

• HVAC equipment or ductwork 

• Significant occupant health concerns 

• Materials that may also contain lead or asbestos 

• A moisture source that has not been identified 

Small areas of mold on hard surfaces may sometimes be cleaned by a homeowner after the moisture source is corrected. Moldy porous materials, including drywall, insulation, carpeting, and ceiling tile, may need to be removed rather than cleaned. 

Professional assessment is advisable when mold is extensive, hidden, recurring, associated with contaminated water, or likely to be disturbed throughout an occupied home. 

Tip 2: Use the Right Work Practices for the Hazard 

Testing does more than confirm whether a hazard is present. It helps determine whether the project is appropriate for DIY work or should be handled by a trained contractor. 

Keep Occupants Out of the Work Area 

Children, pregnant people, pets, and other occupants should remain outside a potentially contaminated renovation area. 

For lead-related work, occupants should remain out until: 

• Work has stopped 

• Debris has been contained 

• Protective sheeting has been removed correctly 

• The area has been thoroughly HEPA-vacuumed and wet-cleaned 

• Any recommended clearance testing has been completed 

Closing an interior door alone is not adequate containment for a dusty renovation. 

Isolate the Work Area 

Lead-safe containment may include: 

• Removing furniture and belongings where possible 

• Covering items that cannot be removed 

• Protecting floors with durable plastic sheeting 

• Closing and sealing doors and openings 

• Preventing dust from entering HVAC supply and return vents 

• Establishing a controlled path for workers and waste 

• Keeping tools, protective clothing, and debris inside the work zone 

Containment requirements vary by hazard. Plastic sheeting and a respirator are not substitutes for licensed asbestos-abatement procedures. 

Minimize Dust 

Avoid high-dust methods whenever lead paint or another hazardous material may be present. 

Examples include: 

• Open-flame burning or torching 

• Uncontrolled power sanding or grinding 

• Extensive dry sanding or scraping 

• High-temperature heat guns that char paint 

• Dry sweeping 

• Using compressed air to clean surfaces 

• Demolition without containment 

EPA lead-safe guidance recommends using lower-dust methods, HEPA-equipped tools, misting or wet techniques where appropriate, and frequent HEPA vacuuming. 

Use Appropriate Personal Protective Equipment 

Personal protective equipment should be selected for the specific contaminant and task. A mask alone does not make hazardous work safe. 

For DIY work involving potential lead dust, EPA guidance suggests considering: 

• A properly fitted disposable N-100 respirator 

• Disposable coveralls 

• Disposable shoe covers 

• Gloves 

• Eye protection 

• Head covering 

Workers should wash their hands and face before eating or leaving the area. Work clothes should be washed separately from household laundry. Eating, drinking, or smoking should not occur inside the work area. 

Respirators must fit properly to be effective. People with certain medical conditions may need medical guidance before wearing one. 

Do not rely on DIY protective equipment to remove asbestos. Suspected asbestos should be evaluated by qualified professionals before work continues. 

Tip 3: Clean Properly and Verify the Area 

A renovation is not complete when the demolition or painting stops. Dust and debris must be removed without spreading them to the rest of the home. 

Do Not Dry Sweep Hazardous Dust 

Dry sweeping can send fine particles back into the air. A standard household vacuum may also redistribute very small lead or asbestos particles. 

For lead-safe cleanup, EPA guidance calls for: 

• Collecting chips and debris and sealing them in heavy-duty bags 

• Misting contaminated plastic before folding it inward 

• HEPA-vacuuming surfaces and objects 

• Wet-wiping horizontal surfaces 

• Damp-mopping uncarpeted floors 

• Repeating cleaning until no dust or debris remains 

EPA specifically advises against dry sweeping lead-contaminated dust and recommends HEPA filtration when visible paint dust or debris is present. 

Cleanup procedures for asbestos are different and should be performed as part of a properly controlled abatement project—not as a general DIY cleaning exercise. 

Use the Right Type of Post-Work Verification 

There is no single test that clears a home for every possible environmental hazard. Verification should be targeted to the material and work performed. 

After Lead-Paint Work 

A lead dust-wipe clearance test can measure settled dust on floors, windowsills, and other surfaces. This provides more meaningful information than relying on visual cleanliness alone. 

For work performed under the EPA RRP Rule, contractors generally complete a required cleaning-verification procedure. A homeowner may request independent dust-clearance testing for additional confirmation. 

After Asbestos Abatement 

A licensed or certified professional may perform a visual inspection and, where required, clearance air sampling. The specific requirements depend on the project size, jurisdiction, work method, and applicable regulations. 

Do not enter or dismantle an asbestos containment area unless the project has passed the required clearance process. 

After Mold Remediation 

Post-remediation verification may include: 

• Confirming that visible mold and debris have been removed 

• Checking that affected materials are dry 

• Verifying that the moisture source has been corrected 

• Confirming that the remediation scope was completed 

• Conducting targeted sampling when appropriate 

Routine mold air sampling is not required after every small cleanup. The verification method should reflect the original problem, project size, and remediation plan. 

When Should You Hire a Professional Instead of Doing It Yourself? 

Consider stopping the project and contacting an environmental professional when: 

• The home was built before 1978 and painted surfaces will be disturbed 

• Pipe insulation, flooring, ceiling tile, plaster, or another material may contain asbestos 

• The work requires extensive sanding or demolition 

• Mold is hidden, widespread, or recurring 

• Water damage involved sewage or contaminated floodwater 

• Dust has already spread outside the work area 

• Children or pregnant occupants may have been exposed 

• The project involves a multifamily or rental property 

• State or local law requires testing, licensing, or clearance 

• You are unsure which materials are hazardous 

• You need independent documentation before or after the project 

Hiring an independent environmental testing company before demolition can define the problem without tying the findings to the cost of remediation or abatement. 

What Happens If You Discover a Hazard After Demolition Has Started? 

Stop work immediately and avoid walking through or cleaning the affected area with ordinary household equipment. 

Then: 

• Keep occupants and pets away 

• Turn off equipment that could spread dust, when it is safe to do so 

• Do not sweep, vacuum, or move debris unnecessarily 

• Close the area without disturbing additional material 

• Contact a qualified environmental inspector 

• Explain what was disturbed, when it happened, and where dust may have traveled 

An inspector can determine whether sampling, environmental cleaning, clearance testing, or other corrective work is necessary. 

Why Test Before a Renovation? 

Pre-renovation testing can help you: 

• Protect occupants and workers 

• Avoid spreading contaminants through the home 

• Select the appropriate contractor 

• Build testing and abatement into the project budget 

• Prevent construction delays 

• Determine the proper containment and cleanup procedures 

• Document conditions before work begins 

• Reduce the risk of an expensive whole-home cleanup 

Testing is particularly important before opening walls, removing flooring, replacing windows, disturbing insulation, or demolishing materials in an older property. 

Schedule Pre-Renovation Environmental Testing 

RTK Environmental provides independent testing for lead, asbestos, mold, indoor air quality, dust, and other environmental concerns. 

Because RTK performs testing and consulting rather than remediation or abatement, its recommendations are not tied to selling cleanup services. 

Call RTK Environmental Group at 800-392-6468 to discuss your renovation or schedule a pre-renovation inspection. 

Frequently Asked Questions 

Should I test my home before renovating? 

Testing is advisable when a project may disturb painted surfaces in a 

pre-1978 home, suspect asbestos-containing materials, moldy materials, or areas affected by water damage. The necessary tests depend on the property and scope of work. 

Is every material in a pre-1978 home hazardous? 

No. The construction date indicates a greater likelihood that lead paint or certain asbestos-containing materials may be present; it does not prove that every material is hazardous. Testing can identify the specific components affected by the renovation. 

Can I use a home lead-test kit? 

Some EPA-recognized lead-test kits may help homeowners screen particular painted surfaces, but they have limitations. A certified lead inspector or risk assessor can provide more comprehensive testing and documentation. 

Can I take my own asbestos sample? 

EPA recommends that suspected asbestos materials be sampled by a properly trained and accredited professional. Collecting a sample can release fibers and contaminate the surrounding area. 

Is an N95 mask enough for asbestos removal? 

No. A filtering mask does not make unlicensed asbestos removal safe. Asbestos work may require specialized respirators, medical clearance, fit testing, containment, decontamination, air monitoring, and legally required training or licensing. 

Does mold always need to be tested? 

No. When visible mold and its moisture source are obvious, the priority is often to correct the water problem and remove or clean affected materials. Testing may be useful when mold is suspected but not visible, the extent is unclear, documentation is needed, or post-remediation criteria have been established. 

Can I stay in the home during renovation? 

That depends on the scope, containment, materials, and occupants. People should not enter a potentially contaminated work area. Temporary relocation may be appropriate during extensive lead, asbestos, mold, or demolition work. 

How do I know whether cleanup was successful? 

Visual cleanliness alone may not be enough. Lead dust-wipe testing, 

asbestos clearance procedures, or mold post-remediation verification may be appropriate depending on the hazard and work performed.