rick is a timeless and durable building material that offers a classic appearance and solid protection against the elements. However, like all exterior surfaces, brick can accumulate dirt, algae, moss, mildew, and other debris over time. Without proper care, these substances can degrade the mortar, dull the color of the bricks, and affect your property’s appearance and integrity.
Cleaning the exterior of a brick house is not just about improving curb appeal. It also helps maintain structural health, supports long-term durability, and prevents unwanted repairs. But brick is a porous material, and using the wrong cleaning method can do more harm than good. That’s why knowing the best way to clean the exterior of a brick house—and when to call in professional exterior cleaning services—is essential.
This article explores the most effective techniques, tools, safety considerations, and expert recommendations for cleaning a brick house exterior thoroughly and safely.
Understanding the Nature of Brick and Mortar
Why Brick Needs Special Care
Brick and mortar are naturally porous. Over time, these surfaces absorb moisture, which can lead to staining, efflorescence (white salt deposits), and organic growth. Moss and algae can form on shaded or damp walls, especially in humid environments.
When cleaning brick, it’s important to remove contaminants without damaging the surface. Harsh chemicals, incorrect pressure washing, or abrasive tools can strip away protective layers, weaken mortar, or cause discoloration.
This is why many property owners turn to professional exterior cleaning services, which are equipped with the right tools and knowledge to handle brick surfaces effectively.
Benefits of Cleaning Brick House Exteriors
Enhances curb appeal by removing unsightly buildup
Prevents structural damage caused by moss or water retention
Extends the life of your brickwork and mortar joints
Improves overall hygiene by removing mold and algae
Prepares surfaces for painting, sealing, or repairs
Regular exterior cleaning supports both aesthetic and functional goals for your property.
The Best Way to Clean the Exterior of a Brick House
Step 1: Inspect the Surface
Before cleaning, inspect your brick walls for:
Cracked or loose mortar
Mold or algae growth
Rust or water stains
Paint remnants (if previously coated)
Damaged areas should be repaired before cleaning to prevent water from seeping into the brick during the process.
Step 2: Choose the Right Cleaning Method
Different methods are suitable for different levels of buildup and types of brick. Here are the most commonly used techniques.
Soft Washing (Recommended for Most Brick Homes)
Soft washing uses low-pressure water combined with specialized cleaning solutions to break down dirt, mold, and stains. It’s gentle on brick and mortar and offers deep cleaning without abrasion.
Advantages:
Safe for older or fragile brick
Removes mold, mildew, and biological growth
Eco-friendly detergents can be used
This is a preferred method offered by most professional exterior cleaning services.
Pressure Washing (With Caution)
Pressure washing uses high-pressure water to clean tough stains. While effective, it can erode mortar or crack brick if done incorrectly.
Best practices:
Use a wide-angle nozzle to distribute pressure
Keep pressure below 1000 PSI for brick
Maintain a safe distance from the wall
Never pressure wash damaged or old brick
Professional services adjust pressure settings and use the right attachments to minimize risk.
Hand Scrubbing for Spot Treatment
For small areas or sensitive zones, a soft-bristle brush and a mild cleaner can be used to scrub the surface manually.
Useful for:
Detail cleaning near windows and trims
Removing efflorescence
Addressing localized stains
Manual scrubbing requires more time but ensures full control over the cleaning process.
Step 3: Select the Right Cleaning Solution
Brick can react negatively to strong acids or household bleaches. Use cleaning agents designed specifically for masonry or biodegradable cleaners recommended by exterior cleaning services.
Safe cleaning solutions include:
Water and vinegar (for light mold)
Biodegradable detergents
Oxygenated bleach (gentler than chlorine bleach)
Specialized masonry cleaners
Avoid using muriatic acid or high-alkaline products unless specifically advised by professionals.
Step 4: Pre-Wet the Brick
Before applying any cleaning solution, pre-wet the brick with water. This prevents the brick from absorbing too much of the cleaner and allows for a more even application.
Use a garden hose or low-pressure sprayer to soak the area thoroughly.
Step 5: Apply Cleaner and Let It Sit
Apply your chosen cleaner using a sprayer or brush. Let it dwell on the surface for 5 to 10 minutes, depending on the product instructions.
Do not let the cleaner dry on the brick, especially under direct sunlight. Re-wet if necessary to maintain moisture while the solution works.
Step 6: Rinse Thoroughly
After the cleaning solution has had time to break down dirt and organic material, rinse the surface completely with water.
Use a hose or low-pressure setting if you're cleaning yourself. If using a pressure washer, keep a wide spray and move continuously to avoid streaking or erosion.
Step 7: Allow Time to Dry and Inspect
Let the cleaned brick surface dry fully over 24 to 48 hours. Once dry, inspect the wall for missed spots or problem areas. Stains like efflorescence or rust may require repeat treatment or specialty cleaners.
Maintenance Tips to Keep Brick Exteriors Clean
Regular maintenance keeps your brick looking great and reduces the need for deep cleaning.
Rinse exterior walls occasionally to remove surface dust
Trim back trees or shrubs that trap moisture near the wall
Remove moss or weeds growing near the foundation
Clean gutters regularly to prevent water overflow onto brick walls
Schedule professional cleaning every 12–24 months
Exterior cleaning services often provide maintenance plans to ensure your property is consistently maintained.
Safety Considerations When Cleaning Brick
Cleaning a brick house can be risky if not done properly. Safety should always be a priority.
Wear protective eyewear and gloves when using cleaning solutions
Use ladders cautiously and ensure stable footing
Avoid harsh chemicals that may damage the surface or nearby plants
Keep children and pets away from the work area
Don’t clean during extreme weather or under direct sun for extended periods
For multi-story buildings or heavily stained surfaces, professional cleaning is strongly recommended.
When to Hire Professional Exterior Cleaning Services
While DIY methods can be effective for small jobs, hiring a professional has clear advantages.
Benefits of Professional Cleaning
Access to industry-grade equipment
Use of safe, approved chemicals
Trained technicians who understand surface requirements
Efficient and time-saving service
Guaranteed results with minimal risk of damage
Professionals also provide pre-cleaning assessments and can handle larger or complex projects like historical brick restoration or commercial buildings.
Common Issues Addressed by Brick Cleaning
Mold and algae on shaded or moist walls
White stains from efflorescence
Smoke or soot discoloration (near fireplaces or chimneys)
Paint overspray or graffiti
Water stains and mineral deposits
Bird droppings and insect residue
Each of these issues requires specific techniques or products, which are best handled by experienced cleaners.
Environmental and Property Considerations
Modern exterior cleaning services take extra steps to minimize environmental impact.
Use of biodegradable and non-toxic cleaners
Runoff containment to protect landscaping and soil
Water-efficient spray systems
Noise-controlled equipment for residential neighborhoods
This ensures that while your home gets the care it needs, your surroundings stay safe and unaffected.
Conclusion
Cleaning the exterior of a brick house requires a thoughtful and informed approach. Brick is a beautiful and durable material, but it needs regular care to stay in optimal condition. Whether it’s routine maintenance or a full restoration, the best cleaning method combines gentle solutions, the right tools, and expert knowledge.
Soft washing remains the most recommended method for preserving both the integrity and appearance of brick. When supported by proper techniques, environmentally safe products, and regular upkeep, your brick home can look its best for decades.
For homeowners looking to preserve their property’s charm, safety, and value, partnering with trusted exterior cleaning services is the most efficient and effective solution. Whether you're maintaining curb appeal or preventing structural damage, professional help ensures your brick exterior receives the care it deserves.
