How to Check Exterior Paint

Exterior paint does two jobs: it makes your house look good, and more importantly, it keeps water out. When paint fails, water gets behind it. That’s when the real damage starts—rot, mold, and structural problems that cost way more than a paint job.

Why This Matters

Paint is a protective coating. It shields wood, siding, and trim from sun, rain, and temperature changes. When that barrier breaks down:

• Water penetrates – Gets behind siding and into walls
• Wood rots – Moisture feeds decay fungi
• Mold grows – In damp, dark wall cavities
• Siding fails – Swells, warps, and deteriorates
• Insects move in – Termites and carpenter ants love damp wood
• Energy efficiency drops – Damaged areas leak air

A quality paint job should last 7-10 years. Pushing it longer risks expensive repairs.

Warning Signs of Paint Failure

Walk around your house and look for these problems:

Surface Issues

• Peeling or flaking – Paint lifting off in sheets or chunks
• Cracking – Network of cracks, often called “alligatoring”
• Bubbling or blistering – Air or moisture trapped under paint
• Chalking – Powdery residue when you rub the surface
• Fading – Significant color change from sun exposure

Problem Areas

• Window and door trim – Horizontal surfaces catch water
• Fascia and soffit boards – Near gutters, often overlooked
• Corner boards – Water runs down and collects
• Bottom edges of siding – Splash-back from rain
• South and west walls – Get the most sun exposure
• Areas near gutters – Overflow and splash damage

Signs of Deeper Problems

If you see any of these, the damage goes beyond paint:

• Soft or spongy wood when you press
• Dark staining (rot or mold)
• Warped or cupped siding
• Gaps between boards
• Visible damage or holes

How to Check

1. Walk the Perimeter

Start at one corner and walk completely around your house. Look at every wall, every window, every trim piece. Use binoculars if you have them to spot upper-floor issues.

2. Get Closer

For areas you can reach safely, get up close. Press on trim boards and siding. Solid wood won’t give. Soft spots mean rot.

3. Check Trouble Spots

Pay extra attention to:

• Areas where gutters overflow
• Spots that get blasted by sprinklers
• Places where bushes touch the house
• Any previous repairs or patches

4. Document Problems

Take photos of problem areas. Note the location. This helps with planning repairs or getting quotes.

What to Do Based on Severity

Minor Issues (Less than 10% of surface)

• Scrape loose paint down to solid surface
• Sand smooth
• Apply primer to bare areas
• Touch up with matching paint
• Monitor for spreading problems

Moderate Issues (10-30% of surface)

• Consider spot repairs plus a full repaint soon
• Address any underlying moisture problems first
• Replace rotted trim or siding before painting
• Prime all bare wood

Major Issues (Over 30% or extensive damage)

• Time for a full repaint
• Have a pro inspect for hidden damage
• Fix rot and water problems before painting
• Consider it a restoration, not just cosmetic

DIY vs. Call a Pro

DIY: Minor touch-ups, small areas you can reach from the ground, documenting problems.

Call a pro: Full exterior paint, upper stories, lead paint (homes built before 1978), extensive prep work, structural repairs. Find a contractor →

How Often to Check

• Visual inspection: Once a year, ideally in spring or fall
• Close inspection: Every 2-3 years or before planning a repaint
• After storms: Check for damage from hail, wind, or falling debris

The Bottom Line

Paint fails slowly, then all at once. Walk around your house once a year and really look at it. Catching problems early means a touch-up instead of a full repaint. Ignoring them means rot, damage, and a much bigger bill down the road.