Why Exterior Paint Peels and Blisters in Michigan (and How to Prevent It)

There’s something especially frustrating about seeing paint peel off your house that was painted just a few years back. You first noticed a little bubble near the window. Now, there’s peeling along the trim, and more inconsistencies catch your eye every time you pull into the driveway. 

So, what gives? 

Simply put, Michigan weather can be pretty rough on exterior paint. Humid summers, rain and snow, freezing winter temperatures, and plenty of temperature swings can give your home’s exterior paint a run for its money. 

But weather alone usually isn’t the sole culprit. Moisture getting behind the paint, poor surface prep, and painting under the wrong conditions can leave you in this situation.

Why Does Exterior Paint Peel?

Paint starts peeling when it loses its grip on the surface underneath. Sometimes, that’s a paint problem, but more often than not, it’s something underneath or behind it that’s interfering with the bond. 

Some of the most common causes include:

• Moisture: Water can sneak behind paint through damaged siding, gaps around windows and doors, failing caulk, or other openings. As the moisture tries to escape, it can push the paint away from the surface.  
• Poor Surface Prep: New paint can’t bond well when there’s dirt, mildew, chalky residue or old, flaky paint in the way. 
• Painting a Damp Surface: Wood and other exterior surfaces can hold moisture even when they feel dry to the touch. Painting before that moisture has had time to evaporate can lead to adhesion problems. 
• The Wrong Paint or Primer: Some surfaces need a specific primer or coating to create a strong bond. Using incompatible products or skipping primer where it’s needed can shorten your paint job’s lifespan. 
• Age: No paint lasts forever. Years of sun, moisture, and temperature swings will eventually take their toll. As older paint becomes brittle and worn, cracking and peeling become more likely. 

Why Does Exterior Paint Blister or Bubble?

Blistering happens when small pockets form underneath the paint, creating those raised bubbles you see on the surface. Moisture and heat are two of the biggest contributors here:

• Trapped Moisture: Just like with peeling, moisture behind paint can cause it to blister. Little pockets of moisture can get stuck behind the paint, causing the bubbles you see. 
• Painting in Direct Sun or Excessive Heat: A hot surface can cause the outer layer of paint to dry too fast, trapping moisture or solvent underneath. 
• Painting Before the Surface Is Dry: Siding may look ready to paint soon after rain or washing but still contain moisture. If you jump the gun and paint before it’s completely dry, you might end up trapping moisture beneath the paint. 

Why Michigan Weather Can Be Hard on Exterior Paint

Michigan weather puts exterior paint through its paces. The same siding that bakes in the summer sun also has to make it through months of rain, snow, freezing temperatures, and repeated changes in temperature and moisture. 

Michigan’s Freeze-Thaw Cycles

Water can work its way into small cracks, gaps, and areas where paint has already started to fail. Once temperatures drop below freezing, that water expands. 

Repeated freezing and thawing can gradually make those weak spots, giving paint more opportunities to crack, loosen, and peel. 

Rain, Snow, and Lingering Moisture

Rain and melting snow keep Michigan exteriors exposed to moisture throughout most of the year. If water sneaks behind the paint through failing caulk, damaged siding, or gaps around trim, it can get in the way of adhesion and eventually cause peeling or blistering.

Hot, Humid Summer

Summer brings its own challenges. Average relative humidity hovers in the 70s, and that can slow drying. Direct sun can make siding considerably hotter than the surrounding air. 

If paint is applied when the surface is too hot, or conditions are too humid, it may not dry and cure the way the manufacturer intended. 

Peeling vs. Blistering: What Is Your Paint Telling You?

Peeling and blistering are both signs that paint is losing its bond with the surface, but they don’t always point to the same problem. Here’s what your paint might be telling you:

Can Peeling Exterior Paint Be Repaired, or Does the House Need Repainting?

A little peeling around one window doesn’t automatically mean it’s time for a full repaint. 

If the problem is limited to a small area and the surrounding paint still has a solid bond, you might be able to fix the underlying issue, remove the loose paint, prep the surface, and repaint that section. 

Widespread peeling, bubbling, cracking, or flaking is a different story. If the coating is failing across multiple areas of your house, spot repairs can quickly turn into a game of whack-a-mole. A full repaint might make more sense, especially if the existing paint is already getting older. 

There’s one catch either way: the cause of the failure needs to be addressed first. Painting over an active moisture problem or an unstable layer of old paint can leave you right back where you started. 

How Much Does it Cost to Fix Peeling or Blistering Paint?

Fixing a small patch of peeling or blistering paint may cost $50 or less. If you have touch-up paint and supplies already on hand, it might not even cost anything. 

Now, if the peeling and blistering problem is widespread and a total repaint is necessary, you’re looking at somewhere between $800 and $7,000, possibly more if extensive prep is necessary. 

Most homeowners in Michigan pay about $3,200 to repaint their home’s exterior. The variation in cost stems from differences in home size, number of stories, siding material, paint choice, and the amount of prep work needed. 

How to Prevent Exterior Paint From Peeling or Blistering

You can’t do much about Michigan weather, but you can make sure your paint is ready for it. Lots of work needs to happen before a fresh coat ever touches the house:

• Fix leaky gutters, cracked caulk, damaged siding, and other trouble spots before fresh paint goes on.
• Scrape away peeling or flaking paint so the new coat isn’t trying to hang onto an already failing layer.
• Let siding and trim dry completely after rain or washing before you start painting.
• Clean away dirt, mildew, and chalky residue, and prime bare or repaired areas as needed. 
• Check the temperature, humidity, sun exposure, and rain forecast before deciding it’s a good day to paint. 
• Keep gutters, caulk in good shape, and damaged trim repaired to help keep moisture from getting behind the paint.

Frequently Asked Questions

Once paint starts peeling or bubbling, figuring out why is usually only the first question. Here are a few of the questions that usually come next. 

Why is my exterior paint peeling after only a few years?

Something probably kept the paint from bonding properly or caused it to lose that bond early. Moisture, poor surface prep, incompatible products, and less-than-ideal painting conditions are all common culprits. 

Can you paint over peeling exterior paint?

We don’t recommend it. Painting over problematic paint is likely to leave you with the same problem. The loose paint needs to come off, and the surface underneath needs to be cleaned, dried, and properly prepped before another coat goes on.

Will peeling exterior paint keep getting worse?

Usually yes. Once paint starts pulling away, moisture has an easier time getting underneath the surrounding coating and loosening more of it. 

Can moisture inside my house cause exterior paint to peel?

Yep. Excess moisture moving through exterior walls can contribute to peeling exterior paint, so the source doesn’t always have to be rain or water creeping in from the outside.

What time of year is best to paint a house in Michigan?

Late spring through early fall is usually the best time to paint. These times of year give you the best chances at painting during favorable painting weather.

How long should exterior house paint last in Michigan?

There’s no singular lifespan that applies to every Michigan home, but exterior paint usually lasts between 5 and 15 years. This can vary based on the siding material, amount of sun and moisture exposure, quality of the prep work and paint, and upkeep over the years.

Do I need to fix peeling exterior paint right away?

The sooner you fix it, the better. A small peeling spot is no reason to panic, but it’s a good idea to figure out what’s causing it and remedy it before the spot has time to grow.

Give Your Michigan Home a Fresh Start

Peeling and blistering paint can make an otherwise well-kept home look a little worse for wear. And if the paint job started failing sooner than you expected, you probably don’t want to find yourself in the same spot a few years from now. 

RDP Pro Paint takes the time to properly prep your exterior and apply a finish that can stand up to Michigan weather. If your home is ready for a fresh coat, contact us today to schedule an exterior painting estimate.

Sources & References

• Angi – “How Much Does It Cost to Paint a House Exterior?”
  Provides current cost estimates for exterior house painting, including typical price ranges and factors that affect the final cost, such as home size, siding material, labor, prep work, and number of stories.
  https://www.angi.com/articles/cost-paint-house-exterior.htm
• Current Results – “Average Humidity Levels for Michigan”
  Provides average annual and seasonal humidity levels for cities across Michigan, offering useful context for the moisture and humidity exterior paint is exposed to throughout the year.
  https://www.currentresults.com/Weather/Michigan/humidity-annual.php
• Great Lakes Integrated Sciences and Assessments (GLISA), University of Michigan – “Freeze-Thaw Cycles”
  Explains how freeze-thaw cycles occur, how their frequency is changing across the Great Lakes region, and how repeated freezing and thawing can affect infrastructure and materials exposed to moisture.
  https://glisa.umich.edu/resources-tools/climate-impacts/freeze-thaw-cycles