What happens during a house painting job, and how long does it take?

Updated November 10, 2026 · KeystoneProGuide editorial team

What is the order of a painting job?

Most of a painting job happens before the first coat. In broad terms it runs: protect the area, repair and prepare the surfaces, prime where needed, apply the finish coats, then clean up and walk through the result. In a house built before 1978, federal rules add steps at the start and the end, and those steps are not optional for a paid painter.

What happens before work starts?

For a pre-1978 home, the paperwork comes first. No more than 60 days before starting, the painting firm must give you the EPA pamphlet Renovate Right and get your signed acknowledgment that you received it, or mail it at least 7 days ahead and keep proof. If you rent the house out, the occupant gets a copy too.

On any job, agree beforehand which rooms will be out of use and where furniture will go. The Centers for Disease Control and Prevention advises keeping children and pregnant women away from housing undergoing renovation in older homes, and away from cleaning up paint debris afterwards.

How is the work area set up?

In a pre-1978 house, the federal work practice rules are specific. Indoors the firm must post warning signs, remove furniture, rugs and window coverings or cover them with sealed plastic, close and cover ducts in the work area, close windows and doors and cover doors with plastic, and tape plastic over the floor for 6 feet beyond the surfaces being worked on. Outdoors it must close doors and windows within 20 feet and cover the ground with plastic for 10 feet beyond the work, with vertical barriers where the work is within 10 feet of the property line.

The EPA says the certified renovator must be physically present while signs go up, while containment is set up and while the area is cleaned. In a newer house none of this is required, though protecting floors and furniture is still part of a careful job.

What does surface preparation involve?

Repairs, cleaning, scraping and sanding, and dealing with anything that will make new paint fail.

• Moisture first. Purdue Extension, in a publication written with a Forest Products Laboratory scientist, says moisture is the most common cause of premature paint failure on wood and that any moisture problem must be eliminated before repainting.
• Mold. The EPA says moldy surfaces must be cleaned and dried before painting, because paint over mold is likely to peel.
• Loose paint. For spot repairs outside, the Purdue publication describes scraping loose paint, feathering the edges, cleaning and rinsing, treating bare wood, priming and then top-coating, with large cracks caulked after priming.

In a pre-1978 house, how the old paint comes off is regulated. Open-flame burning is prohibited, as is power sanding, grinding or blasting of painted surfaces unless the machine has a shroud and a HEPA vacuum attachment, and heat guns may be used only below 1,100 degrees Fahrenheit. A painter using a torch or an unshrouded sander on old paint is breaking the rule.

What happens during painting?

Primer, then finish coats, as the estimate specified. On exteriors, timing matters: the Purdue publication says to apply the top coat within two weeks of priming and not to prime in fall and finish in spring. Indoors, the EPA advises increasing ventilation when using products that give off volatile organic compounds, and says elevated levels can persist after the work is done, so plan to keep fresh air moving in painted rooms.

Under the lead rule, applying paint to walls that have already been prepared, after cleaning verification, is not regulated. In practice that means the containment and cleanup come around the dusty preparation, and the painting itself follows.

How is the job cleaned up and checked?

In a pre-1978 house the firm must collect chips and debris into heavy-duty bags, mist and fold the plastic sheeting dirty side in, clean walls from the ceiling down with a HEPA vacuum or damp cloth, HEPA-vacuum all surfaces and wipe and mop them. Waste has to be kept contained at the end of each day and during transport.

Then comes cleaning verification. The certified renovator wipes each windowsill, and the floors and countertops in sections under 40 square feet, with a wet disposable cloth and compares each cloth with a cleaning verification card. Any area whose cloth is darker than the card is cleaned again. Outside, the renovator inspects the surfaces and the ground below the work. Only when the area passes do the warning signs come down.

Within 30 days of finishing, or with the final invoice if that comes sooner, the firm must give you a record of how it complied, which may take the form of the regulation's Sample Renovation Recordkeeping Checklist.

How long does a painting job take?

None of the government or extension sources behind these guides publishes a typical duration, and the answer depends on the size of the house, the repairs and the weather. What they do show is where time goes: drying out wet wood before painting, primer and top coat within the two-week window outside, and in an older home the containment, the cleaning and the verification, which can include waiting an hour or until the surface dries before a final wipe.

What should you check before the final payment?

Walk through every room and every side of the house against the contract. The Attorney General advises not to sign a completion certificate until all the work is done to your satisfaction, and the Federal Trade Commission says never to make the final payment until the work is done and you are satisfied with it.

Questions to ask before you hire turns these stages into questions for the estimate, and what Pennsylvania requires covers the contract terms. Painters are listed on the painters directory page.

Sources

1. 40 CFR 745.85 -- Work practice standards., Electronic Code of Federal Regulations
2. 40 CFR 745.84 -- Information distribution requirements., Electronic Code of Federal Regulations
3. 40 CFR 745.86 -- Recordkeeping and reporting requirements., Electronic Code of Federal Regulations
4. Renovation, Repair and Painting Program: Renovator Training, U.S. Environmental Protection Agency
5. About Lead in Paint, Centers for Disease Control and Prevention
6. Paint Failure Problems and Their Cure (NCR-133), Purdue University Cooperative Extension Service
7. A Brief Guide to Mold, Moisture and Your Home, U.S. Environmental Protection Agency
8. Volatile Organic Compounds' Impact on Indoor Air Quality, U.S. Environmental Protection Agency
9. Pottstown-Based Home Improvement Contractor Jailed at Least 3 Years for Taking More than $156K for Jobs he did not Complete, Pennsylvania Office of Attorney General
10. How To Avoid a Home Improvement Scam, Federal Trade Commission