Exterior Painting • Houston TX
Exterior Mold & Mildew Painting
Mildew-stained siding and trim cleaned, dried, primed and repainted with mildew-resistant coatings built for Houston humidity. Get a free instant quote.
Executive Summary: Exterior Mold Painting Houston
Exterior mold painting in Houston cleans mildew off siding and trim, lets the surface dry, then primes and repaints with a mildew-resistant coating.
Each job runs wash + primer + mildew-resistant topcoat, over an estimated 2 to 7 days with a 3 to 6 painter crew. Houston-area pricing typically falls between $2 and $4.50 per square foot, or $4,000 to $9,000 for a 2,000 sq ft home (estimates).
Humid, rainy weeks slow drying after the wash, and soft wood adds repair days. Older homes built before 1978 need lead paint testing first.
Typical Houston Projects
Three common mold and mildew repaint jobs and how we scope them. These are typical scopes, not past projects.
Example scope: Shaded north wall, Kingwood (77345)
What to expect: about 2 to 3 days (estimate), usually $2 to $4.50 per sq ft at Houston-area rates.
See the full scope
Project Size: two-story home under mature oaks
Neighborhood: Kingwood (77345)
Service: Exterior Mold & Mildew Painting
System: mildew cleaner wash + primer + 2 coats of mildew-resistant acrylic
The Problem: black mildew streaks on the north side and soffits
The Solution: wash, dry for a full day, spot-prime, then 2 coats on the affected walls and matching trim
Example scope: Whole-house mildew repaint, Bellaire (77401)
What to expect: about 4 to 5 days (estimate); expect $4,000 to $9,000 at typical Houston-area pricing.
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Project Size: about 2,000 sq ft one-story home
Neighborhood: Bellaire (77401)
Service: Exterior Mold & Mildew Painting
System: wash + stain-blocking primer on stains + 2 coats of mildew-resistant acrylic
The Problem: mildew stains that came back through the last paint job within a year
The Solution: wash and dry fully, prime stained areas, then 2 coats with a mildew-resistant topcoat
Example scope: Wood siding and fence, Clear Lake (77062)
What to expect: about 5 to 7 days (estimate), with Houston-area pricing usually at $2 to $4.50 per sq ft.
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Project Size: older home with wood siding and a side fence
Neighborhood: Clear Lake (77062)
Service: Exterior Mold & Mildew Painting
System: wash, scrape, primer on bare wood + 2 coats
The Problem: mildew under peeling paint and soft spots at the base of the siding
The Solution: lead paint testing first, then wash, scrape, flag rot for repair, prime and paint
Stop Letting Fading & Damage Hurt Your Property Value
Mildew that comes back through new paint
Paint over mildew traps it, and the stain bleeds back within months. We kill it with a mildew cleaner, let the wall dry and prime before any topcoat.
Wash before paint, not instead of it
A wash alone removes the stain for a season. Painting after the wash adds a mildew-resistant topcoat that slows regrowth. For a wash on its own, see House Exterior Cleaning Services.
Moisture that feeds the growth
Sprinklers, gutters and shade keep walls damp. We point out moisture sources at the walkthrough, and peeling from trapped moisture is covered on Peeling & Weather Damaged Painting.
Schedule a Walkthrough
We walk the house, note where mildew grows and look for moisture sources and rot. Your written estimate lists washing, priming and coats by area.
Our Process: Done Right the First Time
- 1Detailed Estimate & Color ConsultationWe walk the outside with you, mark mildew areas and confirm colors. Moisture sources and soft wood get noted before work starts.
- 2Expert Prep & PaintingWalls get a mildew cleaner wash and a full day to dry. Then scraping, caulking, spot primer and 2 coats of mildew-resistant acrylic.
- 3Final Walkthrough & Clean-UpYou walk the house with the crew lead and check the shaded walls first. Beds get a final rinse before we leave.
What to Expect: Your Project Timeline
| Stage | When | What Happens |
|---|---|---|
| Estimate & booking | 1 to 3 weeks before | Walkthrough, moisture check, written estimate |
| Prep day | Day 1 to Day 2 | Mildew cleaner wash, full dry time, scraping and caulking |
| Paint application | Day 2 to Day 6 | Primer on stains and bare spots, then 2 coats |
| Dry & walkthrough | Final day | Walkthrough and touch-ups |
| Curing | First few weeks | Coating cures; avoid spraying the walls with sprinklers until then |
These are estimates. A humid week that slows drying after the wash can add a day.
The Right Time to Schedule Exterior Mold Painting Houston
Mildew is back within a year of painting.
That usually means the last crew painted over it. A proper wash, dry and primer fixes the cause.
Spring is coming.
Painting in spring gives the mildew-resistant coat the longest head start before humid summer months.
Fences and siding share the same stains.
Do them at once. See Fence & Gate Painting Services and Wood Siding Exterior Painting.
Timing Around Humidity
Mildew jobs need one dry day after the wash and another for primer. We plan around Houston humidity and book spring first.
The Henry Contractor Difference
No hidden fees
Your written estimate lists washing, dry time, primer and coats by area before work starts.
Local Houston crews
Local Houston crews know which walls grow mildew first and plan dry time around humidity.
Prep done by the book
Wash, dry, prime, then paint. Plants are covered and rinsed, and nothing gets painted damp.
Transparent Pricing for Exterior Mold Painting Houston
| What Affects the Cost | Standard vs. Premium | Hidden Costs to Watch For |
|---|---|---|
| Scope and size: square footage, stories, number of affected walls | Standard uses acrylic with mildewcide; premium uses top exterior lines with stronger mildew resistance | Two-story walls add roughly 40 to 50% per sq ft for ladder time (estimate) |
| Surface condition and labor: heavy growth, stains, peeling | Standard spot-primes stains; premium adds a full stain-blocking primer coat | Soft-wood repair and pre-1978 lead tests priced on their own lines |
| Access and extras: trees, fences, soffits | Standard covers affected walls and trim; premium adds the whole house for an even color | Tree trimming for access is not included |
Typical Houston-area range for mildew repaints (estimate): $2 to $4.50 per square foot, or $4,000 to $9,000 for a 2,000 sq ft home. Your written estimate after an on-site walkthrough sets the exact price.
Get an Exact Number
How far mildew has spread and what is feeding it shows up only on site. We check, then price in writing.
Exterior Mold Painting Houston vs. DIY vs. Cheap Labor
| Feature | Henry Contractor | DIY | Cheap Labor |
|---|---|---|---|
| Prep Work Quality | Mildew cleaner wash, full dry time, then primer | Bleach spray and paint the same day | Paint straight over the stain |
| Time Investment | 2 to 7 days (estimate), including a dry day | Weekends of washing and waiting | Fast, with no dry time |
| Material Quality | Mildew-resistant 100% acrylic | Standard paint with no mildewcide | Cheap paint that stains again |
| Clean-Up Process | Plants covered and rinsed, debris removed | Runoff on landscaping | Clean-up often missed |
| Pricing Transparency | Written estimate by area | Cleaners and gear add up | Low quote, repaint needed sooner |
Who We Partner With
Homeowners
You want the stains gone for more than one season. We fix the prep that caused it.
Property Managers
You get tenant complaints about black streaks. We wash, prime and repaint on a schedule.
HOA Board Members
Mildew triggers violation letters. We repaint in approved colors with a mildew-resistant topcoat.
Proudly Serving Greater Houston
We proudly provide professional painting services to homeowners and businesses throughout the Greater Houston area, including: The Woodlands, Katy, Sugar Land, Pearland, Cypress, Memorial, and surrounding neighborhoods.
We treat and repaint mildew-stained homes in Memorial (77024), Bellaire (77401), The Heights (77008), Montrose (77006) and West University Place (77005), plus Kingwood and The Woodlands under heavy tree cover.
Other exterior problems and surfaces are on the Exterior Painting Houston TX page.
Frequently Asked Questions
The short answer is yes. Paint applied over mold and mildew traps it, and the stain comes back through the new coat. We wash the surface with a mildew cleaner, let it dry fully, prime, then apply a mildew-resistant coating. Any moisture source needs fixing first.
Washing is not mold remediation. If mold is inside the wall or the siding is soft, that repair comes before any paint.
The short answer is about $2 to $4.50 per square foot of paintable surface, or roughly $4,000 to $9,000 for a 2,000 sq ft home, based on typical Houston-area pricing. Square footage, stories, siding type and repairs move the number. Your written estimate sets the exact price.
Taller homes add roughly 40 to 50% per square foot for access (estimate). Heavy growth needs a longer wash and dry time, which adds labor.
The short answer is it can, on the same shaded, damp sides it grew on before. Washing and killing the growth first, then a mildew-resistant finish, slows it down. Cutting back shrubs so air and sun reach the wall does more than the coating alone.
The sides that stay wet longest are worth a look each spring, before the growth spreads.
The short answer is the north side and anywhere shaded by trees or fences, because those walls stay damp longest after rain. Walls behind shrubs and under deep eaves are next. Those areas are washed and treated before the rest of the house.
If only one elevation is affected, the estimate can cover that side on its own.
Ready to upgrade your property?
Fill out the free estimate form at the top of the page to get started, or call us directly to schedule your on-site consultation.