Peeling paint on old drywall tells you something went wrong. Maybe moisture got behind the paint layers. Maybe the surface wasn’t prepped correctly before the last paint job. Maybe the existing paint just reached the end of its life. Whatever caused it, you need to fix the problem before applying any new paint, or you’ll watch the same thing happen all over again.
Understanding Why Paint Peels
Paint peels for specific reasons. Moisture buildup behind walls causes one of the most common peeling problems, especially in bathroom walls and other high-moisture areas. When water vapor pushes through drywall, it breaks the bond between paint and surface.
Poor adhesion happens when someone paints over dirty walls or skips proper priming. The paint never really stuck in the first place. Temperature fluctuations make paint expand and contract, which eventually leads to cracking and peeling. Old paint simply loses its flexibility over time.
Thick coats applied all at once create another problem. The top layer dries while underneath stays wet, causing the paint to crack and eventually peel away from the wall.
Gathering Your Supplies
You’ll need the right tools for fixing peeling paint properly. A putty knife helps remove loose paint without gouging the drywall underneath. Get one with a flexible blade for better control. A paint scraper works for larger peeling areas where you need to strip away more material.
Drywall compound fills any deeper cracks or damaged spots you uncover. Joint compound works similarly but comes in handy for smoothing larger areas. You’ll need sandpaper in various grits, starting with coarser paper and moving to finer grits for the final smoothing.
An oil-based primer seals the repaired areas and prevents more peeling. Some situations call for a stain-blocking primer, especially if you’re dealing with water stains or other discoloration. Mildew-resistant primer makes sense for bathroom walls and other areas prone to moisture.
Don’t forget these items:
- Drop cloths protect your floors from paint chips and dust
- Dust mask keeps you from breathing in old paint particles
- Damp cloth for wiping down surfaces before painting
- Latex paint or your finish paint of choice for the final coats
Removing Loose Paint
Start by protecting your space with drop cloths. Put on your dust mask because you’re about to create a lot of dust. Use your putty knife to scrape away all the loose paint. Work gently at first to see how much comes off easily. Sometimes you’ll find that peeling occurs in patches, while other times whole sections want to come away.
The goal is to remove all the paint that isn’t firmly attached to the drywall. Press the putty knife against the wall and push forward, letting the blade slip under loose paint. If paint resists and stays stuck, leave it alone. You only want to remove what’s already failing.
A paint scraper handles larger areas faster than a putty knife. Keep the blade at a low angle to avoid digging into the drywall. You’re removing paint, not sculpting the wall.
Sand the edges where the remaining paint meets the bare drywall. This creates a smooth transition so you won’t see ridges after painting. Start with medium-grit sandpaper and work the edges until you can’t feel a lip where paint ends.
Cleaning and Preparing the Surface
Once you’ve removed all the loose paint, you need to clean the area thoroughly. Use a damp cloth to wipe down the entire surface. This removes dust from sanding and any grease or dirt that might prevent proper adhesion.
Let the wall dry completely before moving forward. Depending on humidity levels, this might take a few hours or overnight. Touch the wall to make sure it feels dry, not cool or damp.
Inspect the exposed drywall for damage. Sometimes peeling paint reveals problems underneath. Look for deeper cracks that need filling. Check for soft spots that might indicate water damage. If you find mold or mildew, you need to address that before painting or the problem will return.
Repairing Damaged Areas
Apply drywall compound to any holes, cracks, or damaged spots. Use your putty knife to press the compound into the damage, then smooth it level with the surrounding wall. A thin layer works better than trying to fill everything in one application.
Let the first coat dry completely. Drying time varies depending on how thick you applied the compound and the humidity in your space. Most products need at least two hours, but overnight works better if you’re not in a hurry.
Once dry, lightly sand the repaired areas until they feel smooth to the touch. You want the repair to blend seamlessly with the original surface. Wipe away sanding dust with a damp cloth before proceeding.
Larger repairs might need two coats of compound. Apply the second coat after sanding the first, building up the surface gradually rather than trying to fill deep damage all at once.
Applying Primer
Primer makes or breaks your repair process. An oil-based primer seals porous drywall and creates a surface that helps paint adhere properly. It also prevents moisture from reaching the drywall, which stops future peeling.
Apply a primer coat to all repaired areas and any spots where you removed paint down to bare drywall. Extend the primer slightly beyond the repair so the new paint blends with the existing paint. Use a brush for cutting in around edges, then a roller for larger areas.
A mildew-resistant primer works better for bathroom walls and other areas where moisture accumulates. This extra protection helps prevent peeling from occurring again in high-moisture areas. Let the primer dry completely according to the manufacturer’s instructions. Rushing this step causes problems later.
Some situations call for a stain-blocking primer:
- Water stains that bleed through regular primer
- Smoke damage that discolors new paint
- Grease stains from kitchens
- Marker or crayon marks that show through latex paint
The sealer coat prepares the surface for your finish paint. Once primer dries, lightly sand any rough spots with fine-grit sandpaper. Wipe away dust with a damp cloth.
Painting the Repaired Area
Now you’re ready to apply your finish paint. Match your paint color to the existing wall color as closely as possible. Take a chip of the old paint to the store for color matching if needed.
Apply the first coat using smooth, even strokes. Don’t load your brush or roller too heavily. Multiple thin coats create a better finish than one thick coat that might drip or sag. Thick coats also take longer to dry and increase the risk of future paint problems.
Let the first coat dry according to the paint label instructions. Adequate drying time between coats prevents the paint from wrinkling or failing to bond properly. Most latex paint needs at least two hours between coats, but longer is better.
Apply a second coat after the first dries completely. Two coats usually provide enough coverage to hide repairs and match the surrounding wall. Feather the edges where new paint meets old so you can’t see where one stops and the other starts.
Semi-gloss paint works well in bathrooms and kitchens because it resists moisture better than flat paint. Ceiling paint typically has a flat finish that hides imperfections. Wall paint comes in various sheens depending on your preference and the room’s function.
Preventing Future Peeling
Fix the underlying cause of peeling to prevent it from happening again. If moisture caused the problem, improve ventilation in that room. Install or upgrade exhaust fans in bathrooms. Open windows when cooking or showering to reduce humidity.
Address any plumbing leaks immediately. Water behind walls causes paint to fail no matter how well you prepare the surface. Check around windows for air leaks that might let moisture in.
Proper preparation before painting prevents many paint problems. Clean walls thoroughly before applying any paint. Use a good primer on repairs and bare surfaces. Allow adequate drying time between coats.
High-quality paint lasts longer and resists peeling better than budget options. Mildew-resistant paint makes sense for any area with moisture concerns. The extra cost pays off in durability.
Watch painted areas for early signs of trouble. Small bubbles or cracks let you address problems before they turn into large peeling areas. Touch up minor damage promptly to prevent more peeling.
Regular maintenance keeps walls looking good:
- Wipe down walls occasionally to remove dust and grease
- Check bathroom walls monthly for signs of moisture damage
- Inspect around windows and doors where temperature changes cause stress
- Touch up small chips or scratches before they spread
When to Call Professionals
Sometimes peeling paint indicates bigger problems. Extensive water damage behind drywall requires professional assessment. If you keep fixing the same area and peeling occurs repeatedly, something more serious is happening.
Large areas of peeling paint across multiple walls turn into a major project quickly. The repair process takes time and skill to achieve a professional-looking finish. Matching existing paint textures and colors across an entire room challenges even experienced DIYers.
At EG Contracting Services, we handle everything from small repairs to complete interior painting. We’ve seen every type of peeling paint problem and know how to fix them properly. Our team identifies the underlying causes so repairs actually last.
We use high-quality paint and proper preparation techniques that prevent paint problems down the road. Sometimes the peace of mind that comes with professional work is worth more than the money you’d save doing it yourself.
Call us at (571) 253-5583 or message us here to discuss your peeling paint issues and get an honest assessment of what needs to happen.