Here is the short version of how to fix peeling paint on a house. Paint peels because the bond between the paint and the surface failed, and on a house the reason is almost always water: moisture got behind the film, the surface was damp, dirty or chalky when it was painted, bare wood went unprimed, or the coat went on in weather that never let it cure. The fix is the same every time: remove the loose paint, find and stop the moisture, prime the bare spots, then paint. Painting over peeling paint does not work. The old layer keeps letting go and takes the new coat with it.
I am Tyler Finnigan, founder of Finn's Painting Company in Annapolis. Peeling is the most common reason a homeowner in Anne Arundel County calls us for an exterior repaint, and most of what we scrape off did not fail because the paint was bad. It failed because of what was under it or what the weather did to it in the first two days. This guide covers how to tell why your paint is peeling, how to repair it so it lasts, and when the job has outgrown a weekend.
Why is my paint peeling? The five causes we see most
Moisture from behind. Sherwin-Williams describes the mechanism plainly: a dry painted surface gets wet, the wood or the film swells, and the paint loosens, cracks and falls off over time. On our houses the water gets in through worn or missing caulk at joints, corners and window and door openings, through gutters that overflow onto siding, and from inside the house, where bathroom and kitchen moisture migrates out through the wall. Peeling near the bottom of a wall, under a window, or on the wall below a gutter is usually this.
No primer on bare wood. New wood, or wood that was scraped to bare, does not hold topcoat well by itself. Paint applied straight over it looks fine for a season and then lifts in sheets.
Paint over a dirty, chalky or glossy surface. Old exterior paint chalks. Mildew grows on the north side. Both are a layer of powder between the old paint and the new, and paint cannot bond to powder. The same goes for a glossy old finish that was never dulled by sanding.
The wrong weather. Paint needs to stay above its minimum temperature, and above the dew point, for about 48 hours after it goes on. A coat applied on a warm afternoon that got dew or a cold night before it cured never forms a proper film. It peels the following spring. We wrote a separate guide on how cold is too cold to paint outside because this one is so common in late fall.
Layers that do not get along. Fresh latex over old, hard oil-based paint that was not sanded and primed, or many decades of paint stacked on an old house, can let go all at once. Peeling that comes off in big, brittle flakes down to bare wood on a house built before the 1980s is often this.
How to tell which one you have
Look at where the paint is peeling and what is under it.
If the paint is coming off in sheets down to bare wood, the bond to the wood failed: moisture, no primer, or a dirty surface. If it is coming off between coats and you can see sound old paint underneath, the surface between the coats was the problem: chalk, mildew, gloss or weather. Blisters that are wet inside are moisture from behind. Blisters that are dry inside were painted in heat or direct sun.
Then look at the location. Peeling under windows, at the bottom of siding boards, or below a gutter points to water. Peeling on the whole north or east side points to mildew, damp, or paint that never cured. Peeling around a bathroom or kitchen wall from the outside points to interior moisture. Our post on the five warning signs of failing exterior paint walks through what each pattern looks like on an older house.
How to repair peeling paint, step by step
- Find and fix the water first. Recaulk open joints, clear or repair the gutter, fix the flashing, and check the bathroom fan vents outside. Skip this and the repair peels again.
- Remove every bit of loose paint. Scrape until the edge you are scraping holds firm. Then sand the edges of the remaining paint so they feather into the surface instead of leaving a ridge. On a house built before 1978, stop here and read the lead section below before you sand anything.
- Wash the area and let it dry. Rinse off dust and chalk. Kill mildew with a mild bleach solution or a house wash, rinse, and let the wood dry completely, which can take a couple of dry days after rain.
- Repair what is soft. Probe the bare wood with a screwdriver. Soft or spongy wood is rot and has to be cut out and replaced or filled with an exterior wood filler made for it; paint will not hold on rotten wood.
- Prime the bare spots. Use an exterior primer matched to the surface (wood, fiber cement, metal). Primer is what gives the topcoat something to grip.
- Paint two coats, in the right weather. Two thin coats of a quality exterior paint, each allowed to dry fully, on days when the temperature will stay above the product's minimum for the next two nights. The recoat window moves with the weather; our exterior timelines guide explains why.
That is the same sequence we follow on a full repaint: power wash, scrape, sand, fill, prime, paint. The difference between a repair that lasts and one that does not is almost never the paint. It is steps 1 and 3.
Can you paint over peeling paint?
No. Sherwin-Williams' own guidance says they do not recommend painting over cracked or peeling paint because the texture shows through and the cracking comes back, and that matches what we see. New paint bonds to whatever is under it. If what is under it is a loose layer, the new coat is only as attached as that layer, and both come off together. The one shortcut that does work is to scrape and prime only the failed areas and repaint the whole wall, so the repair blends in.
A note on homes built before 1978
Paint on a house built before 1978 may contain lead, and scraping and sanding are the two activities that turn it into dust. The EPA's Renovation, Repair and Painting rule requires anyone paid to disturb painted surfaces in those homes to be certified and trained. Homeowners working on their own house are not covered by the rule, but the EPA recommends hiring a lead-safe certified contractor rather than doing it yourself, and we agree. Our lead-safe renovation page explains how that work is done.
How to keep it from coming back
Most repeat peeling is water finding the same way in. Walk the house each spring and fall: caulk that has pulled away from trim, gutters that overflow, sprinklers hitting the siding, shrubs holding moisture against the wall, and a bathroom fan that vents into the attic instead of outside. Keep paint on the horizontal surfaces, window sills and the bottom edges of siding, because that is where water sits. And when you repaint, insist on the prep. Our exterior prep checklist is what a proper job looks like before the first coat.
When it is a job for a professional
A few square feet under a window is a weekend. Peeling on more than one side of the house, peeling down to bare wood over large areas, any soft wood, anything on a pre-1978 house, and anything on a second story are jobs for a crew with the equipment and the certification.
If you are in Annapolis or anywhere in Anne Arundel County, we will come look at it for free and tell you whether it is a repair or a repaint. Every exterior project we do is backed by five years of free touch-ups, one free hour of touch-up work each year, and by our On Time, On Dime guarantee: we finish inside the agreed schedule and budget or we write you a $1,000 check. Finn's is veteran-owned; I served in the United States Marine Corps before I started the company.
Peeling paint questions
What causes peeling paint on a house?
Water behind the paint film, no primer on bare wood, paint applied over chalk, mildew or gloss, or paint that went on in weather too cold or damp to cure. Sherwin-Williams describes peeling as the film loosening after a dry painted surface gets wet and swells.
How do you repair peeling paint so it lasts?
Stop the moisture first, scrape all loose paint, sand the edges, wash and dry the surface, replace or fill soft wood, prime the bare spots, then apply two coats in weather that stays above the paint's minimum for two nights.
Can you paint over peeling paint?
No. The new coat bonds to the loose layer and comes off with it. Scrape and prime the failed areas, then repaint the wall.
How to repair flaking paint on exterior wood
Same steps as peeling: scrape until the edges hold, feather-sand, wash, let the wood dry fully, prime bare wood, two topcoats. If the wood is soft, it is rot and needs replacing before paint.
Why is my paint peeling on one side of the house only?
The north and east sides stay damp longer and grow mildew, and the side under a bad gutter or beside a bathroom vent gets water the others do not. One-sided peeling almost always points to a moisture source on that side.
Request a free estimate or call (609) 417-0400.
Tyler Finnigan, founder of Finn’s Painting Company, brings a lifetime of craftsmanship and dedication to his work. Raised alongside his father, Tyler honed his construction and finishing work skills, learning the value of precision and excellence. After serving in the United States Marine Corps, where he developed discipline and leadership, Tyler expanded his expertise in the luxury sector, mastering high-end project management and exceptional customer service. Today, he combines these experiences to deliver outstanding interior and exterior painting services rooted in integrity and attention to detail. Tyler’s commitment to quality ensures every home shines with beauty and lasting craftsmanship.