Grime, mildew and stains build up a little at a time until one day the outside of your property looks years older. Concrete Sealing for Exposed Aggregate in Northwest One, DC brings it back, usually in a single visit. On exposed aggregate, the method we use is moderate-pressure wash.
How we clean it
Cleaning solution: A concrete pre-treatment and degreaser as needed.
What to know about cleaning exposed aggregate
Exposed aggregate concrete has stones showing at the surface. Too much pressure can loosen stones at the edges, and the surface looks best when cleaned and resealed.
Avoid: High pressure at edges and cracks, which can pop out aggregate.
How often: Clean yearly; reseal every 2-3 years.
When to book concrete sealing for exposed aggregate
- Water soaks in instead of beading
- Stamped concrete looks faded and dull
- Surface flaking or spalling has started
- Stains soak in quickly
What causes the dirt and stains
- Old sealer worn away by sun and traffic
- Freeze-thaw cycles and deicing salts
- Unsealed concrete absorbing oil and water
What you can do yourself
- Do the water test: sprinkle water and see if it darkens the concrete quickly
- Keep traffic off a newly sealed surface for the time on the label
- Avoid deicers that contain ammonium nitrate or ammonium sulfate
Not sure what you're looking at? The free stain identifier and safe pressure guide explain each stain and surface.
What can go wrong with DIY pressure washing
- Sealing dirty or damp concrete, which traps stains and turns cloudy
- Slippery finishes without an anti-slip additive
- Applying too thick a coat, which peels
Our process for concrete sealing for exposed aggregate
- Clean the concrete thoroughly
- Treat stains and let the surface dry
- Repair cracks where needed
- Apply a penetrating or film-forming sealer
- Keep traffic off until it cures
How much does concrete sealing for exposed aggregate cost?
What moves the price:
- Size: square footage of siding, roof or flatwork
- Condition: heavy growth, old stains and peeling finishes take longer
- Access: number of stories, roof pitch, slopes and how close we can park
- Add-ons: sealing, gutter brightening and other services done in the same trip
These are typical U.S. ranges, not a quote. You get an exact price before any work starts. For a quick estimate, try the pressure washing cost calculator.
Other services for exposed aggregate
- Pressure Washing for Exposed Aggregate
- Driveway Cleaning for Exposed Aggregate
- Sidewalk & Walkway Cleaning for Exposed Aggregate
- Patio Cleaning for Exposed Aggregate
- Pool Deck Cleaning for Exposed Aggregate
- Oil Stain Removal for Exposed Aggregate
Local concrete sealing for exposed aggregate for Northwest One, DC
In District of Columbia, concrete has to deal with summer mildew and winter salt and freeze-thaw cycles. Annual cleaning and a sealer every few years help it last.
Crews serve all of Northwest One (ZIP codes 20404, 20417 and 20536), plus Mount Vernon Triangle (0.3 mi), NoMa (0.3 mi), Shaw (0.7 mi) and Union Market (0.8 mi). Call (555) 010-0000 for a free quote in Northwest One.
Concrete Sealing for Exposed Aggregate: frequently asked questions
How much does concrete sealing for exposed aggregate cost in Northwest One, DC?
Concrete Sealing for Exposed Aggregate typically costs $400-$1,200 for a typical driveway or patio, and usually takes 1 day plus cure time. The exact price depends on the size and condition, and you get it before any work starts. Call (555) 010-0000 for a free quote.
Do you use high pressure for concrete sealing for exposed aggregate?
For exposed aggregate: usually 1,500-2,500 PSI with a surface cleaner. What we avoid: high pressure at edges and cracks, which can pop out aggregate. We keep the pressure even and controlled, with the right tools for the surface.
Is concrete sealing for exposed aggregate safe for my plants and pets?
We pre-wet plants and lawns, keep cleaning solutions diluted to what the surface needs, and rinse landscaping again when we finish. Keep pets and children inside until surfaces are rinsed and dry.
How often should I schedule concrete sealing for exposed aggregate?
Clean yearly; reseal every 2-3 years. Shade, nearby trees, humidity and heavy traffic mean more frequent cleaning; sunny, dry spots can go longer. Our free cleaning frequency tool gives a recommendation for your climate.
What if it rains on the day?
Light rain doesn't stop most washing, but heavy rain, high wind, lightning and freezing temperatures do, and sealers and stains need dry weather to cure. If the weather isn't right, we reschedule at no charge. Our work is backed by a satisfaction guarantee.