Exterior Painting

Exterior painting protects your home from weather, UV damage, moisture, insects, and rot while dramatically improving curb appeal. A quality exterior paint job lasts 7-15 years depending on climate, paint quality, and surface preparation.

When to Paint Your Exterior

Ideal Weather Conditions

Factor	Ideal Range	Why It Matters
Temperature	50-85°F (10-30°C)	Paint won't cure properly below 50°F; dries too fast above 85°F
Humidity	Below 50%	High humidity prevents proper drying and adhesion
Wind	Light breeze	High wind causes uneven drying, carries debris into wet paint
Rain	No rain 24 hrs before or after	Moisture ruins fresh paint; surface must be dry
Sun	Indirect/shade	Direct sun on surface causes too-rapid drying, poor adhesion

Pro tip: Follow the shade around the house — paint the north and east sides in the morning, south and west in the afternoon, always staying out of direct sunlight on the working surface.

Season

• Best: Late spring and early fall (mild, stable temps)
• Good: Summer (long days but watch for extreme heat)
• Avoid: Winter (too cold in most climates), rainy season

Choosing Exterior Paint

Paint Type

• 100% acrylic latex (recommended): Most flexible, breathable, UV-resistant, and durable. Industry standard.
• Alkyd/oil-based: Superior adhesion on chalky surfaces but restricted in many areas due to VOC regulations. Yellows over time.

Finish Selection

Finish	Best For	Durability
Flat/Matte	Siding, large surfaces, hiding imperfections	Good; less washable
Satin	Siding (most popular exterior choice)	Very good; easy to clean
Semi-gloss	Trim, shutters, doors, fascia	Excellent; maximum protection
High-gloss	Front doors, accent details	Maximum; dramatic appearance

Surface Preparation

Exterior prep is even more critical than interior — the elements test every weakness.

Step 1: Inspect and Repair

• Replace rotted wood — don't paint over it
• Reset popped nails and fill with exterior-grade wood filler
• Repair damaged siding, trim, and fascia
• Caulk all gaps: around windows, doors, where trim meets siding
• Repair or replace cracked glazing on windows

Step 2: Clean the Surface

• Power wash all surfaces at 1,500-2,500 PSI with appropriate tip
• Use a fan tip (25° or 40°) and maintain 12-18 inches distance
• Work from top to bottom
• Add cleaning solution for mildew-prone areas
• Allow 48-72 hours of drying after power washing

Step 3: Scrape and Sand

• Scrape all loose, peeling, and flaking paint
• Feather edges of remaining paint with 80-grit sandpaper
• Sand glossy surfaces for adhesion (150-grit)
• Remove all sanding dust with brush or compressed air

Step 4: Prime

• Apply exterior primer to all bare wood, bare metal, and repaired areas
• Use oil-based primer for best adhesion on bare wood
• Use stain-blocking primer over tannin-rich woods (cedar, redwood)
• Use rust-inhibiting primer on exposed metal
• Prime entire surface if changing from oil to latex

Painting Process

Work From Top to Bottom

1. Fascia and soffits — highest point, drips won't hit finished work below
2. Gutters and downspouts — while you're up high
3. Siding — work in horizontal bands, one course at a time
4. Trim, windows, and doors — detail work with brush
5. Porches, steps, and foundation — lowest point, last

Application Methods

Method	Speed	Coverage	Best For
Brush	Slow	Excellent penetration	Trim, detail work, small areas
Roller	Medium	Good	Flat siding, large smooth areas
Airless sprayer	Fast	Very good (with back-brushing)	Large areas, textured surfaces, siding
Sprayer + back-brush	Medium-Fast	Best overall	Professional standard for most exteriors

Spraying Technique

1. Mask all windows, doors, light fixtures, and landscaping
2. Spray at consistent distance (12 inches) and speed
3. Overlap each pass by 50%
4. Back-brush immediately — work paint into the surface with a brush after spraying
5. Back-brushing ensures adhesion and eliminates thin spots

Siding Tips

• Paint the bottom edge of each clapboard/lap siding board
• Work the full length of each board without stopping
• Maintain a wet edge — never let paint dry mid-board
• Vinyl siding: never choose a color darker than the original (warping risk)
• Brick: use breathable masonry paint; consider limewash as an alternative
• Stucco: use elastomeric paint for crack-bridging capability

Painting Specific Surfaces

Windows

1. Open windows slightly so they don't seal shut
2. Paint muntins (grid bars) first with a small brush
3. Paint sash (the frame holding glass)
4. Paint the frame and casing
5. Carefully cut in along glass or use masking tape
6. Move windows periodically while paint dries

Doors

1. Remove hardware (knobs, knockers, house numbers)
2. For panel doors: paint panels first, then rails (horizontal), then stiles (vertical)
3. For flat doors: roll, then tip off with a brush
4. See Painting Doors for complete guide

Metal Surfaces (Railings, Gutters)

1. Remove loose rust with wire brush or sandpaper
2. Apply rust-converting primer
3. Coat with exterior metal paint or acrylic latex
4. See Painting Metal for detailed guide

Ladder and Scaffold Safety

• Use the 4-to-1 rule: base should be 1 foot from the wall for every 4 feet of height
• Maintain three points of contact at all times
• Never lean beyond arm's reach — move the ladder instead
• Set ladder on firm, level ground
• Use ladder stabilizers for working near gutters
• For heights above 20 feet, consider scaffolding or boom lift rental
• Never paint in high winds
• See Painting Safety for comprehensive safety guide

Coverage and Costs

Surface	Coverage per Gallon	Coats Needed
Smooth siding	400-450 sq ft	2
Textured siding	300-350 sq ft	2
Stucco	150-200 sq ft	2
Brick	150-200 sq ft	2
Trim/detail	350-400 sq ft	2
Concrete/masonry	200-300 sq ft	2

For cost estimates, see How Much Does Painting Cost.

Maintenance

• Inspect annually — look for peeling, chalking, cracking, and mildew
• Clean annually — gentle power wash or hand wash to remove dirt and mildew
• Touch up damaged areas promptly — small repairs prevent larger failures
• Caulk any new gaps that develop around windows and trim
• Repaint every 7-15 years depending on climate and paint quality

Frequently Asked Questions

How long does exterior paint last?

Quality 100% acrylic latex exterior paint lasts 7-15 years depending on climate, sun exposure, surface prep quality, and paint grade. South and west-facing walls degrade faster due to UV exposure. Premium paints with higher pigment concentrations and better binders last longer. In harsh climates (extreme heat, cold, humidity, or salt air), expect the shorter end of the range. Proper prep and two full coats maximize longevity.

Can I paint my house exterior myself?

Yes, with proper planning and safety precautions. A single-story home is a manageable DIY project for most homeowners. Multi-story homes require significant ladder work or scaffolding and carry higher safety risks — consider hiring professionals for second-story and above. Budget 1-2 weeks for a full exterior depending on house size. The biggest challenge is typically prep work, which takes more time than the actual painting.

What temperature is too cold to paint outside?

Most exterior paints require a minimum of 50°F (10°C) during application and for several hours afterward. Some specialty cold-weather formulas work down to 35°F (2°C). Below minimum temperature, paint won't form a proper film — it may crack, peel, or have poor color development. Check both air temperature and surface temperature. Also consider overnight temperatures — if paint applied in afternoon faces freezing overnight, it may fail. Always check the paint can label for specific temperature requirements.

Should I spray or brush exterior paint?

Spraying with back-brushing is the professional standard for most exterior work — it's fast and ensures good penetration. Spraying alone (without back-brushing) can leave thin coverage that fails prematurely. Brushing alone provides the best paint penetration but is very slow for large areas. Rolling works well for flat surfaces like smooth siding and soffits. For trim and detail work, a brush is essential regardless of the method used for siding.