Painting a Lanai Ceiling in Florida: Why It Peels, and How to Make It Last

On a lot of Florida homes, the lanai ceiling is the first painted surface to fail. The walls outside look fine, and the ceiling over the pool is flaking, spotted gray or black at the corners, or peeling in sheets.

It is not bad luck. A lanai ceiling lives in the hardest spot on the house for paint.

Why lanai ceilings fail first

• No sun. Sun dries a surface after rain and dew. A covered ceiling stays in shade all day, so moisture that settles on it leaves slowly.
• Humid air with nowhere to go. The air under a covered lanai stays humid, especially next to a pool. Sherwin-Williams’ application guide notes that “dew will form on almost everything as soon as the sun sets,” and a ceiling that is cooler than the air around it collects it.
• Mildew. Shade plus moisture is exactly what mildew wants. Once it starts at the corners, it spreads.
• The wrong paint. Because a lanai feels like a room, it is tempting to use interior ceiling paint. It is not. It is an exterior surface with no direct rain, which is a different job from a bedroom ceiling.

Mildew first, paint second

The EPA is plain about it: “Paint applied over moldy surfaces is likely to peel.” Its cleanup guidance for hard surfaces is to “scrub mold off hard surfaces with detergent and water, and dry completely.”

On a lanai ceiling that means:

1. Clean off the growth and any loose, flaking paint.
2. Let it dry completely. In a Florida summer, pick a dry stretch, and give it more time than a wall in the sun.
3. Scrape and sand edges of old peeling paint so the new coat does not outline every flake.
4. Prime bare spots and stains.
5. Two finish coats of an exterior paint.

If the growth keeps coming back in one spot, look for the water: a roof leak, a gutter overflowing at the edge, or a bathroom exhaust venting into the lanai.

Which paint and sheen

Use an exterior paint. Sherwin-Williams’ Emerald Exterior, for example, states “a mildew-resistant coating” and resistance to blistering, peeling, fading and dirt pickup. Those are manufacturer claims, but they are the right claims for this spot.

For sheen, Sherwin-Williams’ guide lists flat for ceilings and says flat or eggshell best hides imperfections. A lanai ceiling is seen from below at a low angle, which shows every bump, seam and patch, so flat or a low sheen usually looks best. See exterior paint sheen for Florida homes.

When to paint it

Paint needs dry time before moisture settles on it. Sherwin-Williams says most products need at least 4 hours before moisture can settle on the surface, and ideally the temperature stays above the dew point for 48 hours after painting. On a lanai, that means:

• Start once any morning dew has dried off the ceiling.
• Stop early enough in the afternoon that the last coat has its hours before evening dew.
• Pick the dry season if you can. See how long paint takes to dry in Florida humidity.

About haint blue

You will see a lot of porch ceilings painted a soft sky blue. It is a Southern tradition called haint blue, and it started with the Gullah people in Georgia and South Carolina. The popular claim that it keeps wasps and mosquitoes away has not been proven. If you like the look, it suits a lanai well. Pick an exterior paint either way.

The rest of the lanai

A painted ceiling over a dirty cage and a stained deck still looks tired. It often makes sense to do the whole lanai together, the ceiling painted and the cage and deck washed, as two of our reviews describe. See pool cage and lanai screen cleaning. If the deck needs paint too, see painting a pool deck.

On a Sarasota or Manatee job

Two of our Google reviews are about lanai painting, one of them a lanai ceiling. We use Sherwin-Williams exterior paint, clean and treat mildew before priming, and back the work with a one-year warranty and free touch-ups. See exterior painting.