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Common Exterior Painting Problems and How to Fix Them


Painting the exterior of your home is a big project that can significantly improve your home’s curb appeal and protect it from the elements. However, like any home improvement task, exterior painting can come with its own set of challenges. Whether you’re dealing with peeling paint, mildew, or uneven coverage, it’s important to know how to fix these issues to ensure a long-lasting, professional finish. In this blog, we’ll explore some of the most common exterior painting problems and provide solutions to fix them.

1. Peeling or Cracking Paint

The Problem:Peeling or cracking paint is one of the most common issues seen on home exteriors, particularly in older homes or those exposed to harsh weather conditions. This can happen when the paint loses adhesion to the surface, leading to flaking, blistering, or cracking.

The Cause:

  • Poor surface preparation (e.g., dirty or damp surfaces).

  • Use of low-quality paint.

  • Applying paint in extreme temperatures.

  • Moisture buildup behind the paint.

The Fix:

  • Surface Preparation: Scrape off the peeling or cracked paint using a paint scraper or wire brush. Sand the area smooth to ensure an even surface for new paint.

  • Prime the Surface: Apply a high-quality primer to improve adhesion, especially if you’re painting over bare wood, masonry, or previously damaged areas.

  • Use High-Quality Paint: Opt for exterior-grade paints that are formulated for durability. Choose paints with good weather resistance and UV protection.

  • Check for Moisture: If moisture is the cause, address the source of the issue first. Repair any leaks in gutters, downspouts, or siding before repainting.

2. Blistering Paint

The Problem:Blistering occurs when bubbles form under the paint, causing sections to lift away from the surface. It can make your paint job look unsightly and lead to premature paint failure.

The Cause:

  • Painting in direct sunlight or on hot surfaces.

  • Moisture trapped beneath the paint, often due to painting over damp surfaces.

  • Applying oil-based paint over a damp surface.

The Fix:

  • Remove the Blisters: Scrape off the blistered paint carefully with a scraper or putty knife.

  • Sand the Area: Smooth out the surface with fine-grit sandpaper to ensure the new paint will adhere evenly.

  • Prime and Repaint: Prime the area with a moisture-resistant primer, and repaint during cooler weather or when the surface is fully dry. Avoid painting in direct sunlight or in hot, humid conditions.

3. Mildew and Mold Growth

The Problem:Mildew and mold are common issues in humid or damp climates and can leave dark spots or stains on your painted surfaces. Not only does it affect the appearance of your home, but it can also damage the paint if left untreated.

The Cause:

  • Excess moisture from rain, humidity, or poor ventilation.

  • Painting over a surface that wasn’t properly cleaned.

The Fix:

  • Clean the Surface: Use a solution of water and bleach (3:1 ratio) to kill mildew and mold on the surface. Scrub the affected areas with a soft brush, then rinse thoroughly with clean water.

  • Allow to Dry: Make sure the surface is completely dry before painting.

  • Use Mildew-Resistant Paint: Choose an exterior paint formulated with mildewcides to prevent future growth.

4. Fading or Chalking Paint

The Problem:Over time, exterior paint can fade or chalk, leaving a powdery residue on the surface. This is particularly common on areas exposed to strong sunlight and UV radiation.

The Cause:

  • Prolonged exposure to direct sunlight and harsh weather conditions.

  • Use of low-quality or non-UV-resistant paint.

  • Paint applied too thinly.

The Fix:

  • Clean the Surface: Remove any chalky residue by washing the surface with soap and water or using a pressure washer.

  • Choose UV-Resistant Paint: When repainting, select high-quality, UV-resistant exterior paints designed to withstand sunlight exposure.

  • Apply Multiple Coats: Apply at least two coats of paint for even coverage and added protection against fading.

5. Alligatoring (Cracked Pattern on Paint)

The Problem:Alligatoring refers to a cracked pattern that resembles alligator skin and occurs when the paint film becomes brittle.

The Cause:

  • Applying a topcoat before the undercoat has dried completely.

  • Using a hard, glossy paint over a more flexible coating.

  • Aging paint that loses flexibility over time.

The Fix:

  • Remove the Old Paint: Scrape or sand away the alligatored paint down to a smooth surface.

  • Prime the Surface: Apply a primer suitable for your exterior surface to improve adhesion and flexibility.

  • Choose the Right Paint: Use compatible paints (e.g., acrylic latex paints) that allow for better flexibility and resistance to cracking.

6. Uneven or Patchy Paint Coverage

The Problem:Uneven or patchy paint coverage can result in areas that look blotchy, with some parts appearing darker or lighter than others. This is often due to improper application techniques or using too little paint.

The Cause:

  • Skipping the primer step on bare or previously unpainted surfaces.

  • Not applying enough paint for full coverage.

  • Inconsistent roller or brush strokes.

The Fix:

  • Prime First: Always prime bare surfaces before painting to ensure consistent absorption of paint.

  • Apply Evenly: Use even, smooth strokes when applying paint. For large surfaces, a roller with the correct nap thickness can ensure better coverage.

  • Multiple Coats: Don’t try to stretch one coat of paint. Apply at least two coats for a more uniform appearance.

Conclusion

Exterior painting can encounter many challenges, but with proper preparation, the right materials, and a bit of know-how, most problems are easy to fix. By addressing these common issues early, you can ensure a durable, long-lasting paint job that will keep your home looking beautiful for years to come. If you’re unsure how to tackle a particular painting problem or want a professional finish, don’t hesitate to reach out to us at Quality Wise Painting. We’re here to help you achieve a flawless exterior paint job that stands the test of time.

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