What's the difference between pressure washing and chemical cleaning for masonry?

Pressure washing uses high-pressure water alone to blast away surface dirt, but it can damage mortar joints and soft brick if the pressure is too high. Chemical cleaning uses specialized, pH-balanced solutions applied at low pressure that dissolve stains, algae, and buildup without harming the masonry. We use the chemical cleaning method for most brick and stone because it's far safer for the mortar joints and delivers a deeper, more uniform clean — especially on older or historic masonry.

What is efflorescence and how do you remove it?

Efflorescence is the white, chalky deposit that appears on brick and stone surfaces. It's caused by water migrating through the masonry and carrying dissolved mineral salts to the surface, where they crystallize as the water evaporates. We remove it using specialized acidic cleaners that dissolve the mineral deposits without damaging the brick. However, removing efflorescence is only half the solution — we also identify and address the moisture source causing it, often recommending waterproofing to prevent recurrence.

How often should masonry be professionally cleaned?

For most residential brick and stone in Northern Illinois, we recommend professional cleaning every 3-5 years, depending on exposure to moisture, shade (which promotes algae growth), and air pollution. North-facing walls and areas near trees may need more frequent cleaning. After cleaning, applying a breathable waterproofing sealer extends the time between cleanings by preventing moisture absorption that leads to biological growth and staining.

Can you remove old paint from brick without damaging it?

Yes, but it requires the right approach. We use specialized paint strippers formulated for masonry that soften the paint for removal without harsh mechanical scraping that can damage brick faces. Multiple applications may be needed for thick or multi-layered paint. It's important to note that some older paints may contain lead, which requires additional safety precautions. We assess the paint type and brick condition before recommending the best removal method for your specific situation.

Is your cleaning process safe for historic or older brickwork?

Absolutely. Historic and pre-1920s brick is often softer and more porous than modern brick, making it vulnerable to damage from aggressive cleaning methods. We use low-pressure chemical cleaning with products specifically formulated for historic masonry. We never use high-pressure washing on older brick. Our approach follows preservation industry best practices to clean effectively while protecting the integrity and character of your historic masonry.

Are your cleaning chemicals safe for landscaping and the environment?

We take environmental responsibility seriously. The cleaning solutions we use are biodegradable and break down quickly after application. Before any cleaning project, we pre-wet surrounding landscaping, cover sensitive plants with protective sheeting, and thoroughly rinse all adjacent areas after the work is complete. We also manage runoff to prevent chemicals from entering storm drains. Our process is designed to restore your masonry while protecting your yard and the local environment.

Masonry Cleaning & Restoration in McHenry County, IL | RCC Masonry & Concrete

RCC Masonry& Concrete

Lakemoor, IL • Serving McHenry & Lake County(224) 441-5284

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Professional brick cleaning and power washing in Mundelein IL

Restore & Protect Your Masonry

Masonry Cleaning

Erase years of dirt, algae, and pollution stains. Then, lock out moisture permanently with commercial-grade silane-siloxane waterproofing that extends the life of your brick and stone.

Call (224) 441-5284 for a Quote

What is Masonry Cleaning?

Masonry cleaning is the professional removal of stains, efflorescence, algae, mold, and old paint from brick, stone, and block surfaces using low-pressure chemical washing techniques. Unlike power washing, professional masonry cleaning uses pH-balanced solutions that dissolve contaminants without eroding mortar joints or damaging the brick face.

Masonry Cleaning — Quick Facts

•Low-pressure chemical cleaning for brick and stone — removes stains, algae, efflorescence, and old paint without damaging masonry.
•Recommended frequency: every 3–5 years, depending on exposure to moisture and shade.
•Breathable waterproofing sealers available to prevent future biological growth and staining.
•All work backed by a 5-year workmanship warranty. Free on-site estimates.
•Service area: McHenry County, Lake County, and surrounding Northern Illinois communities.

Our Two-Step Restoration Process

You can't waterproof a dirty wall, and cleaning a wall without waterproofing it leaves it vulnerable. We provide a complete restoration system.

Step 1: Deep Masonry Cleaning

We safely remove decades of organic growth, atmospheric dirt, and mineral stains without damaging the underlying brick or mortar joints.

Low-pressure chemical washing to protect mortar
Removal of white efflorescence (salt stains)
Eradication of green algae, moss, and mold
Rust and hard water stain removal
Safe for historic and delicate brickwork

Step 2: Breathable Waterproofing

Once the masonry is clean and dry, we apply a commercial-grade penetrating sealer. This is NOT a cheap surface paint—it chemically bonds with the brick.

100% Breathable: Allows interior water vapor to escape
Invisible finish: Doesn't change the color or add a glossy shine
Stops 'spalling' (bricks popping faces during freezes)
Prevents future mold, mildew, and algae growth
Provides up to 10 years of professional protection

Waterproofed brick wall repelling water in Grayslake IL

Proper waterproofing causes water to bead and roll off, never soaking in.

Why Illinois Masonry Needs Waterproofing

Brick and mortar are naturally porous materials—they act like rigid sponges. During a heavy rainstorm, an unsealed brick wall can absorb gallons of water.

In Northern Illinois, this is a massive structural threat. When that trapped water freezes in the winter, it expands by 9%. This immense internal pressure causes the faces of your bricks to crack and pop off (spalling) and destroys your mortar joints.

The "Paint" Mistake

Never paint your brick with standard exterior paint. Paint traps interior moisture inside the wall, guaranteeing that your brick will rot and crumble from the inside out. Our silane-siloxane sealers are 100% breathable, allowing vapor to escape while blocking liquid water from entering.

Areas We Serve

Professional masonry cleaning services across McHenry & Lake County, IL.

View All 71 Service Areas →

Protect Your Investment.

Stop freeze-thaw damage before it destroys your masonry. Contact us today for a free cleaning and waterproofing estimate.

Call (224) 441-5284OR

Based in Lakemoor, IL
RCC Masonry & Concrete

Materials We Use

We use professional-grade, environmentally responsible products that clean effectively without damaging your masonry.

Biodegradable Cleaners

pH-balanced, environmentally safe cleaning solutions that dissolve dirt, algae, and stains without harming brick, mortar, or surrounding landscaping.

Low-Pressure Wash Systems

Controlled low-pressure application that delivers cleaning power without the destructive force of high-pressure washing that damages mortar joints.

Poultice Compounds

Specialty paste-based products applied to deep-set stains like rust, oil, and smoke — they draw contaminants out of porous masonry over time.

Breathable Sealers

Commercial-grade silane-siloxane penetrating sealers that block water absorption while allowing interior moisture vapor to escape freely.

Efflorescence Removers

Acidic cleaning solutions specifically formulated to dissolve mineral salt deposits without etching or discoloring the brick surface.

Paint Strippers for Masonry

Specially formulated chemical strippers that soften and remove old paint from brick without mechanical scraping that damages brick faces.

Common Issues We Treat

Illinois weather and environmental conditions create unique masonry staining and deterioration problems. Here's what we treat most often.

Efflorescence (White Salt Stains)

Mineral deposits that migrate to the brick surface as water evaporates — a sign of moisture infiltration that needs both cleaning and waterproofing.

Algae, Moss & Mold Growth

Green and black biological growth thrives on north-facing and shaded walls in Illinois' humid summers, trapping moisture against the masonry.

Paint Overspray & Old Paint

Improper painting or decades-old paint coatings that trap moisture inside the brick, causing hidden deterioration and unsightly peeling.

Atmospheric Pollution Staining

Dark soot and carbon deposits from vehicle exhaust and industrial emissions that build up on masonry surfaces over years.

Rust & Hard Water Stains

Iron oxide stains from rusting metal fixtures, sprinkler systems, or iron-rich groundwater that leave deep orange-brown discoloration.

Smoke & Fire Damage

Carbon and soot staining from chimney backflow, nearby fires, or grill exposure that penetrates deep into porous masonry surfaces.

Cost Expectations

Transparent pricing for masonry cleaning and waterproofing in McHenry and Lake County. Free estimates on every project.

Basic Masonry Cleaning

Standard dirt, algae, and atmospheric stain removal

$3 - $5/sq ft

Deep Chemical Cleaning

Heavy staining, efflorescence, or multi-layer buildup

$5 - $8/sq ft

Paint Removal from Brick

Chemical stripping of old paint coatings — multiple passes may be needed

$6 - $10/sq ft

Waterproofing (Sealer Application)

Breathable silane-siloxane penetrating sealer application