How to prepare your exterior for paint after a New England winter

Exterior painting in Massachusetts isn't just about color. The difference between a paint job that lasts a few years and one that fails quickly usually comes down to prep, especially after snow, ice and road salt.

Here's how I think about getting trim, porches and entryways ready for paint in places like Somerville, Medford, Cambridge and nearby towns.

1. Pick the right window for exterior work

In our climate, exterior painting usually happens from late spring through early fall. As a rule of thumb:

• Daytime temps should be consistently above 50°F
• Surfaces should be dry with no active frost or dew
• We're watching the forecast for several dry days in a row

That's why planning in early spring is smart, even if brushes don't hit the house until May or June.

2. Start with a thorough cleaning

Paint sticks best to clean, dull surfaces. After winter, that means washing away:

• Dirt and road dust kicked up by plows and traffic
• Green or black mildew on shady sides of the house
• Loose paint chips and chalky, oxidized paint

For many homes, a gentler wash with a garden hose, scrub brush and cleaner is better than blasting everything with a pressure washer, which can damage older wood and drive water where it shouldn't go.

3. Scrape and sand failing paint

Once surfaces are dry, the next step is to remove loose paint and feather the edges:

• Use a sharp scraper to remove all loose, flaking paint
• Sand rough edges so they transition smoothly to sound paint
• Vacuum or dust off sanding residue instead of painting over it

On older homes, it's important to follow lead‑safe practices where there's a chance of lead paint. That often means more containment and cleanup than a quick DIY scrape.

4. Spot‑prime bare wood and problem areas

Any bare wood or heavily weathered spots should be primed before finish coats go on. For New England exteriors, that usually means:

• Using a quality exterior bonding or stain‑blocking primer
• Priming knots and resinous spots that might bleed through
• Paying extra attention to horizontal surfaces and end grain

5. Address minor carpentry and rot before painting

Paint is not a fix for rotten wood. Before you commit to new color, it's worth:

• Checking sills, trim and railings for soft or spongy areas
• Replacing or repairing sections that have started to rot
• Securing loose boards, balusters and handrails

I often handle small trim repairs and replacements before painting so everything gets sealed up at the same time.

6. Caulk selectively

Caulk can help keep water out, but you don't want to trap moisture. In general:

• Caulk gaps where trim meets other trim or siding
• Avoid caulking the bottom edge of horizontal siding
• Use high‑quality exterior caulk that stays flexible

7. Plan colors with your whole exterior in mind

When you're updating entry doors, trim and porches, a little color planning goes a long way:

• Consider how colors look next to neighboring houses
• Think about light: bright colors pop in shade; deep colors need enough contrast
• Test samples in real daylight on the actual surfaces you're painting

Need help getting your exterior ready?

If you're in Somerville, Medford, Cambridge or nearby towns and want help with exterior prep and painting, you can use the quote form on the home page to share a few photos and details. I'll take a look, talk through options and timing, and then put together a written estimate.