Removing old paint: strippers, heat, sanding and the rules that apply

Updated November 10, 2026 · KeystoneProGuide editorial team

Does old paint have to come off before repainting?

Usually not all of it. Most repaints need loose paint scraped off and the edges feathered, not a strip to bare wood. Purdue Extension's publication on paint failure, written with a Forest Products Laboratory scientist, describes spot repair for peeling: scrape the loose paint, feather the edges, clean, treat the bare wood, prime and top-coat. It reserves complete removal for one condition in particular: cross-grain cracking from a paint film that has become too thick, for which it says total removal is the only solution.

The National Park Service makes the same distinction for historic woodwork. Its Preservation Brief 10 covers limited and total paint removal as separate treatments when preparing old wood for repainting.

What methods do the rules forbid in an older house?

In a home built before 1978, the federal work practice standards for paid work rule out three things:

open-flame burning or torching of painted surfaces;
high-speed machines that remove paint by sanding, grinding, power planing, needle gun, abrasive blasting or sandblasting, unless the machine has a shroud or containment system with a HEPA vacuum attachment collecting dust where it is made, and no visible dust escapes;
heat guns at 1,100 degrees Fahrenheit or more.

The Pennsylvania Department of Health goes further in its advice: never use a heat gun or torch to remove lead paint, because the lead enters the air when heated, and never dry-sand or dry-scrape. Keep the surface wet and use wet scraping and wet sanding.

Is stripping lead paint the same as fixing it?

Not in the regulators' terms. The Environmental Protection Agency calls work designed to permanently address lead paint hazards, by removing, sealing or enclosing the paint, abatement, and says it can involve specialized techniques most residential contractors do not use. In Pennsylvania, abatement requires an individual with a state lead certification photo ID working for a company with Lead Contractor certification, with a licensed lead supervisor on staff. The EPA also says homeowners should not try to remove lead paint themselves.

So if the purpose of a job is to get rid of lead paint, rather than to prepare a surface for new paint, ask whether the contractor holds the state's abatement certification and not only the federal renovation certificate.

What about chemical strippers?

Two cautions from the EPA. First, methylene chloride strippers are gone from the consumer market: the agency prohibited them for consumer use in 2019 and its 2024 rule prohibits most commercial uses too, including paint and coating removal. It encourages anyone who still has one to stop using it and to ask the local solid waste agency how to dispose of it.

Second, any stripper is a solvent problem indoors. The EPA's indoor air page says that during and for several hours after paint stripping, levels of organic chemicals may reach 1,000 times outdoor background levels. Its general advice is to increase ventilation, meet or exceed the label precautions, and buy only as much as you will use right away.

Can paint be power-washed off?

Not safely from soft or historic materials. The National Park Service says pressure washing works by abrading material from the surface, that excessive pressure can remove surface material and scar historic stone, brick or concrete, and that even 200 to 500 psi may be too much for some materials. It notes that low-fired historic brick has a soft, porous interior beneath its fire skin and that lime-based mortars, stuccoes and limewash are sensitive. On an older painted surface, the lead rule applies to blasting as well.

Does removing paint from brick need approval?

On a property listed on the Philadelphia Register of Historic Places, yes. The Historical Commission reviews masonry cleaning, painting, pointing, repair and removal work. Elsewhere, a local historic district may have its own rules; ask the municipality.

Could the paint contain asbestos?

Textured paint can. The EPA lists textured paint and patching compounds among materials that may contain asbestos in older homes, says you generally cannot tell by looking, and says not to saw, sand, scrape or drill material that does. Have it tested before stripping or sanding a textured wall or ceiling.

Where does the stripped paint go?

Into bags, not the garden. The EPA says soil near the dripline of buildings painted with lead paint typically holds higher lead levels, and that yards become contaminated when exterior lead paint flakes or peels into the soil. That is why the federal standards require a firm working outside a pre-1978 house to cover the ground with plastic for 10 feet beyond the work, collect chips and debris into heavy-duty bags without scattering them, and keep the waste contained until it leaves the site.

What does removal cost?

More than painting. Angi's exterior painting survey prices paint stripping at $0.50 to $2 per square foot as an addition to the paint job. HomeGuide prices full lead paint removal at $6 to $17 per square foot. Both are national figures.

Why exterior paint peels helps decide whether removal is needed at all, and the lead rule for older homes explains your rights on the job. Painters are listed on the painters directory page.

Sources

Paint Failure Problems and Their Cure (NCR-133), Purdue University Cooperative Extension Service
Preservation Briefs, National Park Service
40 CFR 745.85 -- Work practice standards., Electronic Code of Federal Regulations
Reduce the Risk of Lead Exposure at Home, U.S. Environmental Protection Agency
Lead Poisoning Frequently Asked Questions, Pennsylvania Department of Health
Lead Abatement, Inspection and Risk Assessment, U.S. Environmental Protection Agency
LEAD Certification FAQs, Pennsylvania Department of Labor and Industry
Risk Management for Methylene Chloride, U.S. Environmental Protection Agency
Volatile Organic Compounds' Impact on Indoor Air Quality, U.S. Environmental Protection Agency
Protect Your Family from Exposures to Asbestos, U.S. Environmental Protection Agency
Preservation Matters: Maintenance - Graffiti Removal from Historic Features, National Park Service
Protecting Historic Structures from Oil Contamination, National Park Service
Get approval for work to a historic property, City of Philadelphia
How Much Does It Cost to Paint the Exterior of a House? [2026 Data], Angi
How Much Does It Cost to Paint a House Exterior? (2026), HomeGuide