Here is exactly how to prep, prime, and paint your bathroom for a finish that lasts.
Key Takeaways
- Choose the right paint: Use mold-inhibiting, mildew-resistant paint with a satin or semi-gloss finish.
- Prep is everything: Clean walls thoroughly with TSP and sand down glossy surfaces before painting.
- Don’t skip primer: A moisture-resistant primer seals the walls and prevents peeling.
- Wait to shower: Allow the paint to cure fully for at least 24 to 48 hours before using the shower.
What You Need
Gathering the right tools before you start prevents mid-project trips to the hardware store. Here is what you need to paint a bathroom:
- Paint roller and covers: Choose a nap thickness suitable for your wall texture.
- 2-inch sash brush: Perfect for cutting in around toilets and vanities.
- Paint tray and liners: Makes cleanup significantly faster.
- Screwdrivers: Flat-head and Phillips for removing switch plates.
- Plastic sheeting: Protects fixtures and floors from splatter.
- Painter’s tape: Ensures clean lines along trim and ceilings.
- TSP (Trisodium Phosphate): Removes soap scum and grease.
- Spackle and sandpaper: For patching holes and dulling old glossy paint.
- Interior latex paint: Specifically formulated for bathrooms.
How To Paint a Bathroom
Before you pick up a brush, you must select the right mold-inhibiting paint. Bathrooms are wet environments. If you choose standard flat paint, it will absorb water like a sponge.
Look for “Bathroom” or “Kitchen” paint on the label. These contain antimicrobial additives to fight mildew. You should also opt for premium brands with a higher volume of solids. These solids dry to form a thicker, more durable acrylic shell. Cheaper paints rely on solvents that evaporate, leaving a thin layer that peels quickly.
1. Calculate Coverage
Check the paint can for square footage coverage, then measure your bathroom walls. Multiply the length by the width to get your square footage.
While windows and doors reduce the area, it is better to ignore them in your math. This ensures you have slightly more paint than you need for touch-ups later.
2. Prepare The Surfaces
Preparation determines how long your paint job lasts. Soap scum, hairspray residue, and dust prevent new paint from bonding.
Scrub the walls with Trisodium Phosphate (TSP). It cuts through bathroom grime better than standard soap. Once the walls are clean and dry, fill any nail holes with spackle. Finally, lightly sand the walls to remove bumps and rough up the old glossy paint. This gives the new coat something to grab onto.
3. Remove Obstacles
To get a professional finish, you need clear access. Remove outlet covers, towel bars, vent covers, and switch plates.
Painting behind the toilet is often the hardest part. If you have a steady hand, you can use a small roller or brush slide behind the tank. However, for a perfect job, you may want to remove the tank. Shut off the water valve, flush to drain the tank, disconnect the supply line, and unscrew the bolts. If you aren’t comfortable with plumbing, stick to taping around it.
4. Mask Off the Room
Apply painter’s tape to the trim, the bathroom ceiling edge, and around the bathtub or shower surround. Press the tape down firmly with a putty knife to prevent bleed-through.
Cover the sink, toilet, and floor with drop cloths or plastic sheeting. Bathrooms are small, so splatters land everywhere.
5. Apply Primer
Do not skip this step. Humidity seeks out weak spots in your paint. A high-quality moisture-resistant primer seals the drywall and creates a barrier against water vapor.
Apply one to two coats over the walls. Wait two to four hours for it to dry completely. If you paint over wet primer, the topcoat will slide right off.
6. Cut In the Edges
Open your paint can and stir it thoroughly to mix the pigments and solids.
Dip your 2-inch sash brush about one-third of the way into the paint. Carefully paint a 2-inch strip along the ceiling line, corners, baseboards, and around fixtures. This process, known as “cutting in,” establishes a border that your roller can’t reach.
7. Roll the Walls
Pour paint into the tray and load your roller. It should be saturated but not dripping.
Start in a corner and roll a W-shape on the wall, then fill it in with vertical strokes. Maintain a “wet edge” by rolling back over the edge of the previous section before it dries. This blends the strokes and prevents lap marks.
8. Apply a Second Coat
Bathrooms usually require two coats for full protection and color depth. Wait at least two to four hours for the first coat to dry.
Top Tip
If your bathroom is cold or humid, drying times will double. Use a fan to circulate air.
Repeat the process: cut in the edges again, then roll the final coat.
9. Cleanup and Curing
Remove the painter’s tape while the second coat is still slightly tacky. If you wait until it is fully dry, you risk peeling the paint off with the tape.
Reinstall your hardware and outlet covers. Most importantly, do not use the shower immediately. Wait at least 24 to 48 hours for the paint to cure. Steam can ruin fresh paint that hasn’t hardened.
Bathroom Painting Tips
The pros use specific techniques to handle the challenges of small, damp rooms. Here are a few hacks to make the job easier.
Choose the Right Sheen
Flat or matte paints hold onto moisture and are hard to clean. For areas like the shower and sink, use Satin or Semi-Gloss. These finishes have a higher resin content, creating a hard shell that repels water and wipes down easily.
Keep a Damp Rag Ready
In a tight space like a bathroom, you will bump into walls or drop paint. Keep a damp cloth looped through your belt loop. Wipe up mistakes immediately before they set on your tile or vanity.
Line Your Tray With Foil
Cleaning paint trays in a bathroom sink is messy and can clog drains. Line your tray with aluminum foil before pouring paint. When you finish, carefully fold the foil inward and throw it away. Your tray stays clean.
Use an Extension Pole
Bathrooms often have tight spaces behind toilets or above vanities where a ladder won’t fit. A short extension pole on your roller helps you reach high spots and ceiling lines safely from the floor.
FAQs
Do I Need to Prime Bathroom Walls Before Painting?
Yes, priming is critical in bathrooms. Primer seals porous surfaces (like drywall or old flat paint) and provides a sticky base for the new topcoat. Without primer, humidity can penetrate the wall, causing the new paint to bubble, peel, or flake off prematurely.
What Paint Should I Use to Prevent Mold?
Select a high-quality acrylic latex paint labeled “mold-resistant” or “mildew-resistant.” These paints contain antimicrobial agents that kill spores before they grow. Semi-gloss or satin finishes are also superior to flat paint because they shed water, reducing the moisture that mold needs to thrive.
Can I Paint Over Old Bathroom Paint?
You can, but you must prep the surface first. If the old paint is glossy, you need to sand it lightly to dull the finish so the new paint bonds. If you are painting over a dark color with a lighter one, apply a primer first to prevent the old color from bleeding through.
How Long After Painting Can I Shower?
You should wait at least 24 to 48 hours before using the shower. While the paint may feel dry to the touch in a few hours, it takes longer to fully cure. Introducing steam too early can cause surfactants to leach out of the paint, leading to streak marks or peeling.
What Color Makes a Small Bathroom Look Bigger?
Light, cool colors like soft whites, pale blues, and light grays make small bathrooms feel airy and spacious. These shades reflect more light, pushing the walls visually outward. Avoid dark heavy colors in small, windowless bathrooms as they absorb light and make the room feel boxy.
