Houston's subtropical climate with hot humid summers and mild winters feeds black algae that streaks shingles fast. We hit it with a soft wash mix that kills the growth at the root instead of just blasting it off. Cheap crews crank up pressure washers and rip granules loose, which is why you see bald spots on roofs in Midtown after one bad cleaning.
Shingle roofs in the Heights and Downtown often fail at the valleys where leaves trap moisture year round. Our process starts with a walkthrough to spot those weak spots before any water hits the surface. We never use chlorine mixes that eat away at the asphalt coating, a mistake that shortens roof life by years.
Harris County rules require proper runoff control on any exterior wash job near the bayous. We set up containment so soap and debris stay off the street and out of storm drains. That step keeps you from getting a fine while the work stays safe for your yard and neighbors.
Call 713-555-0123 today if black streaks are showing up near the Houston Zoo or Museum of Fine Arts area. Waiting lets the algae dig deeper and turns a simple clean into shingle replacement later.
Roof Cleaning Services We Offer
✓Algae Removal
Soft wash treatment kills black streaks on asphalt shingles in one visit and keeps growth from returning for two seasons.
✓Moss and Debris Clearing
We remove thick moss buildup along valleys and edges that traps water and rots underlayment in humid Houston weather.
✓Emergency Roof Wash
Same-day soft wash for sudden mold outbreaks before storms hit, protecting homes in River Oaks and Montrose.
✓Commercial Roof Cleaning
Low-pressure cleaning for flat and low-slope roofs on small retail buildings around Minute Maid Park and Downtown.
✓Gutter and Edge Cleaning
Flush gutters and clean roof edges during the same trip so water flows away instead of backing under shingles.
Roof Cleaning Cost in Houston, TX
| Service | Typical Range | What Affects It |
|---|---|---|
| Single story roof cleaning | $300–$550 | Size and how many slopes need work move the price. |
| Two story roof cleaning | $450–$850 | Access and safety setup add time on taller homes. |
| Commercial roof cleaning | $800–$1,600 | Flat roof square footage and drain access change the total. |
| Emergency algae wash | $500–$950 | Same-day scheduling and weekend work raise the cost. |
| Free estimate | Free | Call 713-555-0123 or stop by 11767 Katy Fwy Houston TX 77079 Mon-Fri 8-6, Sat 9-2. |
Ranges are typical for Houston, TX and confirmed with an exact written quote before any work starts.
How it works
- 1
Walk the Roof
We check every slope for damage and mark problem spots before any cleaning starts, usually 20 minutes on a standard house.
- 2
Apply Soft Wash Mix
Crew sprays the algae killer from the ground or low ladders and lets it dwell 10 to 15 minutes to break down the growth.
- 3
Rinse at Low Pressure
Gentle rinse removes dead algae and soap without stripping granules, taking 1 to 2 hours depending on roof size.
- 4
Final Check and Photos
We walk the roof again, clear gutters, and send before-and-after shots so you see the difference same day.
Pricing
Prices vary by roof size, pitch, and how heavy the algae is.