By American Classic Painters
Preparing the exterior of a house before painting isn’t just busy work—it determines how long your new paint job will last and how good it will look. Skipping prep or doing it half‑heartedly can lead to peeling, bubbling or cracking paint that fails long before its time. In the video below, Dennis from American Classic Painters explains the steps we take to ensure that every exterior painting project starts with a clean, sound surface. This article expands on those steps and shares additional tips from painting experts to help you get the best results.
Watch: How We Prep Exterior Surfaces
1. Inspect the Surfaces
A successful paint job starts with a thorough inspection. Walk around your home and look for peeling paint, cracks, gaps around trim, signs of rot or water damage, and any other issues that need attention. Identifying these problems up front means you can address them before painting begins. Catching rot or moisture problems early also prevents the new paint from trapping moisture inside the wood.
2. Clean Thoroughly
Dirt, mildew and chalky paint residue prevent fresh paint from sticking. Pressure‑washing is an efficient way to remove grime, but it requires a careful touch. This Old House notes that while many contractors use pressure washers, an inexperienced user can gouge wood, shatter glass or force water behind siding; using a hose, pump sprayer or scrub brush is safer if you aren’t familiar with a pressure washer. Before scrubbing, mist and cover nearby plants to protect them from cleaning solutions. Wash the walls with a solution of water, bleach and a mild cleaner (a concentrated bleach‑type detergent also works, as Dennis mentions in the video), then rinse and allow the surfaces to dry completely.
On delicate wood siding, skip power washing altogether; Norton Abrasives points out that power washing can damage soft woods like cedar or redwood and recommends hand‑scrubbing with detergent and water. Whatever method you choose, invest the time—cleaning properly is an investment in a great paint job.
3. Remove Loose Paint and Sand Smooth
Once the surfaces are clean and dry, scrape off any peeling, flaking or bubbling paint. Use a paint scraper or stiff wire brush, working with the grain of the wood, and collect the debris on a drop cloth. Removing poorly adhering paint ensures the new coating has a solid base. After scraping, sand the transitions between bare wood and old paint to create a smooth, feathered edge. Sanding is critical; without it, the new paint may look fine initially but start to fail within a few years. For larger areas, a random‑orbit sander can speed up the job.
If your home was built before 1978, test for lead before disturbing old paint. This Old House advises using an EPA‑recognized lead test kit or sending a sample to an accredited lab. If lead is present, hire a certified professional for safe removal.
4. Repair Cracks and Holes
After sanding, fill cracks, holes and damaged areas with the appropriate filler. Use wood filler for wooden siding and trim, and exterior‑grade caulk to seal joints smaller than ¼ inch. On deeper holes or rotten spots, a two‑part epoxy filler offers lasting repairs. Allow the filler or caulk to dry completely before sanding smooth. Addressing repairs at this stage prevents them from telegraphing through the finished paint surface and helps block moisture and insects.
5. Prime Bare and Repaired Areas
Primer seals bare wood, fills minor imperfections and promotes strong adhesion for the topcoat. Apply primer to any bare or patched surfaces and to areas where you’ve sanded heavily. Using an exterior primer compatible with your chosen paint (latex or oil‑based) is essential. For best results, back‑brush or roll the primer immediately after spraying to work it into cracks and crevices. Allow the primer to dry completely before applying paint.
Bonus Tips for a Professional Finish
- Protect your landscaping and surroundings – Cover plants and soil with drop cloths before cleaning and scraping.
- Choose the right weather – Painting in dry, mild conditions (between 50 °F and 85 °F) helps the paint cure properly and reduces the chance of blistering or peeling.
- Use quality tools and materials – High‑quality brushes, rollers and primers produce a smoother finish and often require fewer coats.
- Don’t rush the prep work – Allow fillers, caulk and primer to dry thoroughly before moving on.
- Consider professional help – If you’re uncomfortable with lead‑paint removal, high ladders or extensive repairs, hire a licensed painting contractor. Professionals like American Classic Painters have the experience and equipment to deliver a durable, beautiful result.
Related Resources
Proper surface preparation is just one part of a quality paint job. For advice on selecting paint types, colours and tools for interiors, read our guide on choosing the right interior paint. If you’d rather have a professional handle your project from start to finish, explore our exterior house painting service or our pressure washing & surface prep services.
Conclusion
Careful inspection, thorough cleaning, diligent scraping and sanding, proper repairs and a quality primer lay the foundation for a long‑lasting, beautiful exterior paint job. By following the steps outlined above—and demonstrated in our video—you’ll ensure that your new paint adheres well, resists the elements and enhances your home’s curb appeal for years to come. Need help? Contact us today for a free estimate and let American Classic Painters bring your vision to life.
