How to Paint Exterior Trim
Refresh your home's exterior trim, fascia, and soffits with proper prep and exterior paint
What You'll Need
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Tools
Angled sash brush
2-3 inch for detailed work
Mini roller(optional)
For flat areas
Paint scraper
Sandpaper
80-120 grit
Caulk gun
Drop cloths
Painter's tape
Extension ladder
Wire brush(optional)
For removing loose paint
Materials
Step-by-Step Instructions
Wash the trim
1-2 hours
Mix TSP or house wash solution according to package directions. Scrub all trim surfaces with a brush or use a pump sprayer. Rinse thoroughly and let dry completely (at least 24 hours).
Pro Tip
Focus on removing mildew, dirt, and chalky oxidation that will prevent paint adhesion.
Scrape loose paint
1-2 hours
Use a paint scraper to remove all loose, peeling, and flaking paint. Work with the grain of the wood. Get down to solid, well-adhered paint or bare wood.
Warning
If your home was built before 1978, test for lead paint before scraping.
Sand the surfaces
1-2 hours
Sand all areas to smooth transitions between old paint and bare wood. Feather the edges of remaining paint. Sand bare wood to remove any remaining loose fibers. Wipe away dust.
Pro Tip
A sanding sponge works well for contoured trim pieces.
Fill holes and cracks
30-60 minutes
Use exterior-grade wood filler to fill nail holes, small cracks, and damaged areas. Overfill slightly as filler will shrink. Let dry completely, then sand smooth.
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30-60 minutes
Apply paintable exterior caulk to all gaps between trim and siding, around windows, and at corner joints. Smooth with a wet finger. Let dry per manufacturer instructions before painting.
Pro Tip
Good caulk joints are crucial for preventing water damage and creating a finished look.
Prime bare wood and repairs
1-2 hours
Apply exterior primer to all bare wood and filled areas. Use a primer with stain-blocking properties if there are any wood tannin stains or knots. Let dry per product instructions.
Warning
Don't skip primer on bare wood - paint alone won't adhere properly or last.
Apply first coat of paint
2-3 hours
Using an angled brush, apply paint in long, smooth strokes following the wood grain. Don't overload the brush - two thin coats are better than one thick coat. Work in manageable sections.
Pro Tip
Start with the harder-to-reach areas first, then work toward easier sections.
Light sand and apply second coat
2-3 hours
After the first coat is dry (follow paint can instructions), lightly sand any rough spots with fine sandpaper. Remove dust and apply the second coat. Two coats minimum for durability.
Pro Tip
The second coat provides the color depth and protection - don't skip it.
Common Mistakes to Avoid
- Painting in direct sunlight (causes blistering)
- Skipping primer on bare wood
- Not caulking before painting
- Painting when rain is expected within 24 hours
- Not scraping loose paint thoroughly
Safety Warnings
- Use proper ladder safety - never overreach
- Wear a dust mask when sanding
- If home was built before 1978, test for lead paint
- Avoid painting in extreme heat or direct sun
When to Call a Professional
If there's significant wood rot, if the house may have lead paint (pre-1978), for very high or hard-to-reach areas, or if you need multiple days and don't have the time.
Have a bigger project in mind? Tell us what you need and help us decide what to build next.
Frequently Asked Questions
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Project Overview
- Difficulty
- Intermediate
- Time
- 4-8 hours
- Est. Cost
- $50–$150
- Tools
- 9 items
- Materials
- 5 items
- Steps
- 8
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