A fresh coat of paint can do wonders for your home and furniture. It can brighten a room, give life to a home, and open up a space. But that same coat of paint can become a nightmare if it’s not done right. Nothing is more disappointing than a paint project gone wrong. This can do the opposite of what you wanted by making whatever was painted an eyesore rather than a masterpiece. Some of the common paint mishaps that can happen are cracking, bubbling, and peeling. You may be wondering why this happens and how to prevent it before you begin your next DIY paint project or hire a painter. Here are the top reasons why your latest paint job already has cracks.

The short answer: Paint usually cracks because of poor surface prep, low-quality paint, applying coats too thick or before the previous coat is dry, moisture or heat, or simply age. Cracks that appear within days of painting almost always point to an application problem, while cracks in older paint are usually a sign it’s reached the end of its lifespan.

Preparation (Or Lack Thereof)

Skipping surface prep is one of the most common reasons paint cracks, because paint can’t bond properly to a dirty, damaged, or glossy surface.

Prior to painting, there are many preliminary tasks to complete like selecting a color, finish, and painting tool. One very important task that often gets overlooked is preparing the surface before painting it. This is critical for a smooth paint job with no hiccups. It helps ensure that the paint adheres to the surface correctly and looks how it is supposed to once it dries. Poor preparation is a common culprit in why paint cracks, chips, peels, and bubbles.

Before painting, always make sure the surface is clean. This will prevent dirt, dust particles, and any other gunk stuck to the wall from being sealed forever and potentially ruining the aesthetic of your new paint. Another trick that can make all the difference is filling in dents or holes in the wall. Depending on the surface, you may also need to sand it down and use a primer. Our interior painting process walks through the prep steps we follow on every job.

Low-Quality Paint Products

Cheaper paints tend to be less flexible, so they’re more likely to crack as the surface underneath expands and contracts.

They say that you get what you pay for, and when it comes to paint, this can be very true. The less you pay for paint, the less likely it may be to stand the test of time. This could result in it peeling, cracking, or chipping more easily and sooner than a higher quality paint would. Prior to selecting your paint, make sure to do your due diligence. It never hurts to research a product, ask around, and read the reviews.

This will help inform your decision and give you a heads up if problems are in store later down the road. Of course, price is usually a big factor in these decisions, but consider paying more now for higher quality, longer-lasting paint. You may also save money in the long run by avoiding future touch-up and repainting costs.

Errors Made While Painting

Applying paint too thick, too thin, or before the previous coat has dried is a leading cause of cracking.

A common reason for cracking paint is an error made during the painting process. Using the correct amount of paint is very important for the outcome of the project. If too much or too little paint is applied, cracking can happen easily and quickly, which can be very frustrating. Luckily, there is an easy solution to this.

The best way to avoid it is simply to paint thin, even layers until you see the result you were looking for. This way you can always add paint as needed and stop when you feel it is enough. When layering paint, it is crucial to let the first layer dry completely before adding the next layer. If you add another coat of paint before the previous one dries, things could look pretty messy, and cracking will likely occur.

Environmental Factors

Moisture and heat can keep paint from bonding correctly, leading to bubbling that eventually cracks and peels.

One of the reasons for cracking or peeling paint is bubbling. After paint bubbles, it has the potential to crack completely. Bubbling in paint is caused by the presence of moisture, heat, or both. Before applying the first layer of paint, ensure that the wall is completely dry and cool. If the wall is damp or hot, the paint will not adhere correctly.

Also, try to avoid painting in a humid room or climate. If this is unavoidable, consider painting during a more favorable time of the year or using a dehumidifier. In Arizona, extreme heat is the bigger risk: paint applied to a sun-baked wall dries too fast to bond properly. Learn more about how temperature and humidity affect paint.

Natural Aging

Paint loses flexibility as it ages, so fine cracks in an older paint job are often a sign it’s time to repaint.

Like us, paint ages, and this is normal. Depending on when the paint job was done, it may begin to crack, and that is simply a sign that the paint has lived a good life and has reached the end of its lifespan. This means it is time to remove that paint and apply a whole new coat. Paint’s lifespan varies, as not all paints are created equal.

When selecting paint, make sure to read reviews and ask about the lifespan of the paint. Here’s more on how long a new paint job should last.

Why Is My Paint Cracking as It Dries?

Paint that cracks while drying was usually applied too thick. The surface dries and shrinks faster than the paint underneath, which pulls it apart. Other causes include painting over a coat that wasn’t fully dry, painting in high heat or direct sun, and applying paint over a porous surface without primer, which draws moisture out of the paint too quickly. To prevent it, use thin coats, follow the recoat time on the label, and paint when the surface is shaded and cool.

Crazing, Alligatoring, and Mud Cracking: Types of Paint Cracks

Not all cracks look the same, and the pattern can tell you what went wrong.

Crazing: A web of fine, shallow cracks in the top coat. It’s typically caused by paint applied too thick, a top coat that dried faster than the layer underneath, or painting over a glossy surface without sanding. Water-based wall paint (called emulsion in the UK) is especially prone to crazing when it’s applied heavily or over fresh plaster or patching compound that wasn’t sealed.
Alligatoring: Deep cracks in a pattern that looks like alligator scales. This happens when a hard, inflexible coating is applied over a softer layer, or when a second coat goes on before the first has cured. It’s also common in very old oil-based paint.
Mud cracking: Deep, irregular cracks that look like dried mud. It’s usually caused by paint or primer applied too thick, especially on porous surfaces.

Paint Cracking on Interior Walls vs. Exterior Walls

On interior walls, cracking is most often caused by thick application, painting latex over oil-based paint without a bonding primer, humidity in bathrooms and kitchens, or movement along drywall seams. On exterior walls, the biggest factors are sun and temperature swings. In Arizona, stucco and wood expand and contract with extreme heat, and UV exposure breaks paint down faster, which leads to cracking, peeling, and fading. See more on why exterior paint fails.

Is It Normal for Paint to Crack?

Fine cracking in paint that’s many years old is normal wear. Cracking in fresh paint is not. If cracks show up within days or weeks of painting, the cause is almost always the application, the prep, or the conditions during painting, and the affected area will need to be corrected rather than painted over.

How to Fix Cracked Paint

Remove loose paint. Scrape away any cracked or flaking paint until you reach a firmly bonded edge.
Sand the edges smooth. Feather the edges so the repaired area blends in with the surrounding paint.
Patch and clean. Fill any gaps or gouges, let the patch dry, then clean off dust.
Prime. Use a quality primer, or a bonding primer if you’re painting over glossy or oil-based paint.
Repaint in thin coats. Apply thin, even coats of quality paint and let each one dry fully.

If the cracking is widespread, especially alligatoring, the old paint may need to be fully removed before repainting. If your home was built before 1978, the old paint could contain lead, so hire a contractor certified in lead-safe practices before any sanding or scraping.

When Cracking Is a Sign of a Bigger Problem

Some cracks aren’t a paint problem at all. Straight cracks along drywall seams, diagonal cracks running from the corners of doors and windows, or cracks that keep coming back after repainting can point to settling, drywall movement, or moisture behind the wall. On exteriors, cracks in stucco can telegraph through the paint. In these cases, the underlying issue needs to be repaired before any new paint will last.

Consider Hiring an Expert

If there is already paint peeling, cracking, or bubbling in your home, you may want to consider us for the job. Removing the paint can be time-consuming, stressful, and can even damage the surface if not done properly. Let us fix and repaint while you relax knowing your home is in expert hands.

If you are not an experienced painter or don’t have all the resources to paint your home confidently, our color consultants and painters at Arizona Painting Company can help by using advanced techniques and industry knowledge! Our extensive experience qualifies us to pick the perfect color, paint, and finish for any interior or exterior painting project. Get a free quote today.

Why Is My Paint Cracking? The Most Common Causes and Fixes