What's actually causing this
Exterior paint peels when moisture gets beneath the paint film. This happens from inadequate caulking around windows and trim, missing or blocked soffit vents (causing interior moisture to push outward), or applying new paint over a dirty or glossy surface.
What you'll need
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- Paint scraper Shop →
- Pressure washer or scrub brush Shop →
- Exterior wood primer Shop →
- Exterior paint Shop →
- Caulk and caulk gun Shop →
Step-by-step fix
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1
Address the moisture source first
Check caulking around windows, doors, and trim. Ensure gutters are directing water away from the wall. Check that soffit vents are clear.
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2
Scrape all loose paint
Use a paint scraper to remove all peeling paint. Don't just paint over loose areas — the new paint will peel within months.
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3
Clean the surface
Wash the entire area with a pressure washer or scrub with a trisodium phosphate (TSP) solution. Let dry fully — at least 24 hours.
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4
Sand and feather edges
Sand the edges of the scraped areas with 80-grit sandpaper to eliminate hard lines. Smooth bare wood with the direction of the grain.
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5
Prime and paint
Apply an oil-based or stain-blocking exterior primer to all bare wood. Let cure per the product spec (usually 24 hours). Apply two coats of exterior paint.
Roofing and siding contractors in Phoenix typically charge $70–130/hr. Roof replacement averages $6,000–15,000, while siding replacement runs $8,000–25,000+ depending on material and home size.
Roofing and exterior work typically requires Phoenix permits and inspections. Get quotes from at least two licensed contractors.
Stucco is dominant and durable in the dry climate. However, it can crack from settlement or poor installation. Tile roofing and metal roofing are common and long-lasting. Wood trim and frames can dry-rot; quality sealant and paint are essential.
Standard roof and exterior maintenance schedules apply in Phoenix.
DIY in Phoenix: Phoenix is very DIY-friendly. Arizona's permissive licensing and culture support homeowner work. Hard water management and HVAC maintenance are common DIY focuses. Cooling system care is critical and often DIY-maintained.
- Peeling covers more than 30% of the surface — full repaint is needed.
- You find rotted wood beneath the paint.
- Lead paint is suspected — home was built before 1978 (test before sanding).
- The surface is above the second story.
Let Uncle AI diagnose it first.
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