It will save you a lot of time and money to first identify what type of paint your walls already have before adding a fresh new coat of paint. Don’t paint over oil-based paint with water-based paint until you’ve If you don’t know the best way to test the paint click here: for our recommended steps.
If the walls are already oil-based paint it would be a huge mistake to paint over it with water-based paint. Here’s why:
Painting water-based paint (like latex or acrylic) over oil-based paint without proper preparation can lead to several issues, including:
So Let’s Talk About What Happens?
- Poor Adhesion – For starters water-based paint doesn’t adhere well to glossy, oil-based surfaces, leading to peeling, flaking, or chipping over time.
- Cracking or Bubbling – The difference in flexibility and drying properties between the two paints can cause cracking bubbling, or uneven coverage.
- Uneven Finish – The water-based paint may not spread smoothly over an oil-based surface, leading to streaks or blotchy areas.
Risks & Problems
- Durability Issues – The new paint job will most likely not last long, forcing you to have to do the work all over again. You also would need to remove the paint. Paint removal can be painstakenly difficult and time consuming to do.
- Time & Money Waste – If the paint fails, you’ll have to strip it and repaint correctly.
- Surface Contamination – Oil-based paints repel water-based paints, preventing proper bonding.
How to Properly Paint with Water-Based Paint Over Oil-Based Paint
To avoid these problems, follow these steps:
- Clean the Surface – Remove dirt, grease, and grime with a degreaser or TSP (trisodium phosphate).
- Sand the Surface – Lightly sand with 180-220 grit sandpaper to remove gloss and create a rough texture for better adhesion.
- Clean the Surface Again– Clean off the dust again from sanding the wall. Make sure the surface is free of all dust before applying paint.
- Use a Bonding Primer – Apply a high-quality bonding primer designed for adhesion between oil and water-based paints.
- Allow Proper Drying – Let the primer fully cure before applying water-based paint.
- Apply Water-Based Paint – Use high-quality acrylic or latex paint and apply in thin, even coats.
The Current Trend for Oil-Based Paint
Over the past decade, the use of oil-based paints in South Florida’s residential rental communities has significantly declined. This shift is mostly due to advancements in water-based (latex) paints, which now offer comparable durability and easier application. Many manufacturers have even discontinued oil-based paints, making them harder to find for contractors.
In South Florida’s humid and coastal climate, water-based paints are often preferred for their flexibility and resistance to environmental factors. They are less prone to issues like fading, peeling, and blistering, which are common problems with oil-based paints in such conditions.
The industry trends seem to indicate a clear move away from oil-based paints in favor of water-based alternatives.
