Most exterior paint problems and solutions come down to one rule: fix what caused the failure before you paint again. On Macomb and Oakland County homes, the cause is usually water getting behind the paint through overflowing gutters, failed caulk or siding that sits too close to the soil.
Peeling and moisture blisters are solved by stopping that water, scraping to a firm edge and priming bare wood. Alligatoring needs the old layers stripped. Chalking and mildew need a thorough wash, or a mildew kill, before a new coat will bond.
Exterior Paint Problems and Solutions at a Glance
| Problem | What we usually find behind it | The solution | Spot repair or bigger job |
|---|---|---|---|
| Peeling | Gutter overflow, short downspouts, failed caulk, mulch against siding | Stop the water, scrape to a firm edge, spot-prime, repaint | Usually spot repair plus a repaint of that wall |
| Moisture blisters | Wet wood under the film | Fix the source, remove blisters, let it dry, prime, repaint | Spot repair if caught early |
| Heat blisters | Dry paint below; painted in direct sun | Scrape, sand, repaint in shade | Spot repair |
| Alligatoring | Decades of layers, often oil under latex | Strip to a sound surface, prime, repaint | Bigger job: stripping |
| Chalking and mildew | Aging paint; shade and damp | Wash or kill mildew until a rub comes clean | Part of normal repaint prep |
If you’re still working out what you’re looking at, our guide to common paint problems covers how to identify each one.
How to Fix Peeling Exterior Paint
The fix for peeling paint always runs in the same order: stop the water, scrape back to a firm edge, spot-prime the bare wood, then repaint. Skip the first step and the new paint lets go in the same spot, usually after one freeze-thaw winter.
Take the blue house below that had started to peel. The worst of the peeling sat right at the inside corner, and the photo shows why. The upper downspout stopped halfway down the wall and emptied onto the siding, and the lower one dumped water into mulch piled against the bottom boards.
Up on the ladder, the crew found a second water source. The gutter’s corner seam had split and was dripping straight onto the trim board below, leaving a rust streak and bare gray wood where the paint had already given up.
We resealed the leaking corner seam on the gutter, ran the upper downspout all the way to the ground and added an extension to carry the water onto the lawn. The mulch got pulled back so the bottom board no longer sits in it. Only then did the crew scrape every loose edge, spot-prime the bare wood.
The same wall after the gutter and downspout fixes, scraping, spot priming and two finish coats.
If the peeling on your house lines up with a gutter corner or a downspout, that’s almost always your answer. Fix the water first, and the exterior painting in Macomb County you pay for afterward will actually hold.
Blistering Paint: Moisture or Heat Decides the Fix
Blisters come in two kinds, and each takes a different fix. Moisture blisters form when water in the wood pushes the paint off from behind, so the source has to be fixed and the wood has to dry before anything goes back on.
Heat blisters form when paint skins over in direct sun or a second coat goes on too soon; those just need scraping, sanding and repainting in the shade.
The siding below in Sterling Heights, MI broke out in clusters of blisters right under a window. The homeowner first noticed small bubbles after a rainy stretch in late spring, and a few had already popped open to show bare wood underneath, on paint that was only about four years old. Low afternoon sun on that wall made heat a fair guess, but blisters bunched under a window usually mean water getting in at the sill or trim joint.
Rather than guess, we put a moisture meter on the blistered board. It read 14.2%. Dry, sound siding usually reads in the low teens, so this was moisture, and painting over it would only have sealed the water in.
The crew found cracked caulk at the sill-to-trim joint letting rain run behind the siding, so they cut it out and resealed it. Once the boards dried out to 12%, the crew scraped off the blisters, primed with Benjamin Moore Fresh Start Exterior Primer and repainted with Benjamin Moore Aura Exterior. It took 1 crew day.
If your blisters sit under a window, a vent or a roofline, treat them as moisture until a meter says otherwise.
Alligatoring: When Another Coat Won’t Hold
Alligatoring happens when old layers of paint, often hard oil under flexible latex, stop moving together and crack into a scaly pattern. The failure is in the layers underneath, so a fresh coat on top just cracks along the same lines. The only lasting fix is to strip back to a sound surface, prime and repaint.
The window sill above is on a Tudor-style home in Grosse Pointe Shores, MI, with stucco, half-timbering and leaded diamond-pane windows. The crew counted five or six layers of paint, with old oil-based coats underneath newer latex, which is what caused the alligator cracking. The front edge had already worn through to bare wood, which is where water gets in next.
If you can see crack patterns like this, put the brush down. Another coat buys you a season at most.
Chalking and Mildew: Clean First, Then Paint
New paint won’t bond to chalk powder, and it won’t stop mildew either; mildew grows right back through a fresh coat. So the fix for both is cleaning, not painting: wash chalky walls until a dark cloth wipes clean, and kill mildew with a cleaner made for it before you rinse and repaint.
The crew treated the wall with a mildew cleaner, rinsed it, let it dry and repainted the siding and trim.
The same wall after the mildew kill, rinse and repaint
Spot Repair, Repaint or Strip: What Your House Needs
The size of the job depends on how far the exterior paint failure has spread and what’s underneath it:
- A small, dry peel on sound wood is a spot repair.
- Peeling or blistering across a whole wall usually means a repaint of that side once the water is fixed.
- Alligatoring means stripping, and that’s the biggest prep job of the three.
A homeowner can safely clean gutters, extend a downspout, pull mulch back from the siding and wash off chalk or mildew. Scraping is different: on a pre-1978 house, test for lead before you touch it. Call a pro when the failure keeps coming back or covers more than a patch. Call a roofer, gutter installer or carpenter first when the cause is a leak, a failed gutter or soft wood.
The houses above all point to the same habits:
- Keep downspouts running all the way to the ground and out onto the lawn.
- Check gutter corners and seams each spring after the thaw.
- Keep mulch and soil below the bottom row of siding.
- Wash shaded walls before mildew gets a foothold.
FAQ
How long does a peeling paint repair last once the water source is fixed?
As long as the rest of the paint job, provided the area was scraped to a firm edge and the bare wood was primed. If it peels again within a year or two, water is still getting in somewhere.
Do I need to repaint the whole house, or just the side that’s failing?
Often just the failing side, once the cause is fixed. The catch is color match: older paint fades, so a patch can stand out. We usually repaint corner to corner on that wall so any difference lands at a corner, where the eye won’t catch it.
Can exterior paint problems be fixed in the fall in Michigan?
Yes, as long as overnight temperatures stay above the paint’s minimum on the label and the surface is dry of dew before work starts. Scraping, gutter repairs and moisture fixes can happen in any dry weather, so fall is a good time to stop the water and let the wood dry before a spring repaint.
Not Sure Which Fix Your House Needs?
We’ll find the cause and tell you straight whether it’s a paint job, a repair first, or both. Call (586) 500-0567 or book an exterior inspection. We serve homes across Macomb and Oakland counties.
