Exterior Paint Problems

6 DIYs to Fix Your Home Exterior Paint Problems

6 DIYs to Fix Your Home Exterior Paint Problems

The exterior paint problems start persisting due to sun exposure, rainwater, and weather changes and more even if you had just given a fresh coat to you walls. Although modern paints are made to tolerate sun exposure, rains, and changes in temperature, they become worn or fade sooner or later.

However, if the homeowners take care of some things, they can extend the time to repaint a few years later. Homeowners can fix most of the paint problems without the need for repainting soon. Here are some DIY ways to fix your home exterior paint problems.



Blistering is one of the most common problems with paint surfaces, especially on the external walls. Its signs include small to medium size of bubbles or blisters that are formed under the paint film. Blisters are most commonly seen on the trims and wood sidings.

The causes of blistering, including painting a surface under direct sunlight or when the surface is already hot. Sometimes painters apply the paint when the wood is damp, causing the moisture to trap under the paint film that leads to blistering.

Dew rain and humidity are other factors that lead to the blistering of paint on external walls and surfaces. You can repair the blistering by the following steps.

Scrape away the blistered paint and sand with a sanding machine or sandpaper to bare the surface of the wood. After sanding, you need to prime the surface by making sure to sand and prime in the shade and not under direct sun. Wait for a few hours and paint the surface with high-quality latex paint of the same color and shade.


Chalking is the formation of fine powder on walls or paint surface that leads to color fading. Although the degree of chalking is a normal way of wearing of paint, excessive erosion of paint film can be a result of heavy chalking.

The main cause of chalking is the use of a low-quality pigmented paint. It can also be caused by the use of interior paint on the exterior walls. To fix the problem of chalking, you need to remove the much of chalk residue by scrubbing it with a stiff bristled brush. Then rinse thoroughly using a power washing equipment or a garden hose.

If there is some chalk still present, use an oil-based acrylic primer on it and repaint. Use a high-quality exterior paint. You don’t need to prime if there is no chalk remaining after scrubbing.

Cracking or Flaking


The splitting of one coat of the paint that leads to the entire damage of the paint film is known as cracking or flaking. The problem appears as hairline cracks in the earlier stages and later becomes the flacking of paint.

Causes of cracking include poor surface preparation and painting the wooden surfaces without priming. Also, painting under the cold and airy conditions makes the acrylic paint to dry too fast.

It is possible to fix the cracking issues by removing the flakes and loose paint with a wire brush. You can also use a scraper to sanding machine to feather the edges.

After scraping the loose paint, it is essential to prime the surface and repaints with good quality paint. In case the cracking goes down to the substrate, you need to remove the paint by scraping followed by sanding or using a heat gun.

Then prime the surface and apply a good quality acrylic paint with a brush or roller.


Efflorescence is also known as mottling and is the formation of white salt deposits. The cause of mottling is the inadequate preparation work before painting the surfaces. Also, failing to prepare the surface by removing the previous mottling can lead to efflorescence.

Consider installing ventilators, particularly in the kitchen, bathroom, and laundry areas, if moist air originates inside the house. Using a wire brush, pressure brush, or pressure washer to scrape the efflorescence and any other loose material.

Then clean the surface thoroughly. Apply a water or solvent based primer or masonry sealer and allow its drying. Then add a high-quality coat of exterior paint, masonry paint, or elastomeric wall coat.


Sometimes due to humidity and moisture, a black or grey fungus is formed on the surface of paint or sealant. Most often, forms on areas that appear to be humid and receive little to no direct sunlight.

Causes involve the use of poorer quality paint, which does not have enough mildewcide. Failure to prime bare wood prior to painting, too. And painting on a substratum or coating on which mildew has not been removed can result in mildew formation.

Check by adding some drops of bleach to the discolored area to separate mildew from dirt; if it disappears, it can be mildew. You can treat mildew with a water and bleach combination, 3:1, and leave on for 20 minutes, adding more as it dries.

It is essential to wear rubber gloves and protective goggles. Then scrub the place, and rinse. Apply an additional acrylic primer, then a top-of-the-line exterior acrylic paint, with a premium low-sheen or gloss-finish acrylic topcoat, depending on the desired look.



The peeling or loss of paint occurs due to poor adhesion. When there are a primer and multiple paint coats, there are chances of peeling. The cause of peeling is the excess moisture that escapes through the exterior walls, usually in the case of oil-based paints.

Homeowners can fix the problem of peeling by eliminating the source of moisture. Also, preparing the surface by removing the loose paint and sanding the rough edges followed by priming can help fix the problem.

Final Words

Most of the paint problems occur due to inadequate preparation of surfaces or using low quality of paint. Also, painting at the wrong time, such as in a humid season, can lead to wearing of paint sooner and short life expectancy.

Therefore, it is essential for homeowners to hire high-quality services like painting services Annandale to paint their house to get good quality work and make the paint last longer.

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