How paint actually fails
Chalking
Surface degradation where the binder breaks down and leaves a powdery residue. Normal for older paint. Indicates the coating is reaching end of useful life.
Peeling and flaking
Adhesion failure. Usually caused by moisture, poor prep, or applying paint over an incompatible surface.
Blistering
Moisture under the coating, or heat applied during cure. Common on south-facing walls in summer.
Fading and color shift
UV degradation. Premium exterior coatings hold color significantly longer than budget products.
Rust bleed-through on metal
Existing rust wasn't properly addressed before paint went on. The rust keeps spreading underneath and bleeds through.
Prep is the job
- Power wash with appropriate detergent to remove dirt, chalk, and contaminants.
- Scrape and sand failed paint to a sound edge.
- Spot-prime bare substrate.
- Treat rust on metal with conversion primer or remove and prime to bare metal.
- Caulk and seal joints before paint, not after.
- Repair any failed substrate (masonry cracks, wood rot) before painting.
Product selection by substrate
Metal buildings and trim
Direct-to-metal (DTM) acrylic or polyurethane systems with proper primer. Two-coat systems are standard for commercial work. Expect 10 to 15 years on properly prepped metal.
Masonry and concrete
Breathable elastomeric or 100 percent acrylic. Never trap moisture in masonry with a film-forming product. Expect 8 to 12 years.
EIFS and stucco
Elastomeric coating designed to bridge hairline cracks. Coordinate with EIFS manufacturer for warranty compatibility.
Wood trim and fascia
Acrylic exterior with appropriate primer. On commercial buildings, consider replacing chronically failing wood with composite or metal trim during the next repaint cycle.
What it costs in Northern Indiana
- Metal building repaint (typical 30,000 to 60,000 sq ft wall area): $1.50 to $3.50 per sq ft.
- Masonry building repaint: $1.50 to $3.00 per sq ft.
- Trim and accent repaint only: priced by job, typically $1,500 to $6,000.
- Touch-up programs: $500 to $2,500 per visit.
When to repaint versus touch up
- Localized peeling or fading on one elevation: touch up.
- General chalking, fading, and 20 percent of the building showing wear: plan full repaint within 1 to 2 years.
- Active rust bleed on metal: address now, even ahead of schedule.
- Buildings on a maintenance program often get small annual touch-ups that push the full repaint cycle out 3 to 5 years.
Timing the work
In Northern Indiana, the optimal exterior paint window is late May through early October. Avoid painting in direct hot sun on dark substrates, and don't paint within 24 hours of expected rain. Spring projects book up early.
Coordinating with other exterior work
Repaints are the right time to address masonry repair, sealant restoration, gutter replacement, and any wood trim that should be swapped for composite. Doing it all in one project window beats coming back three times in five years.