Exterior brick is a durable and beautiful building material, but over time it can accumulate dirt, grime, moss, and other stains that dull its appearance. Restoring the natural color and texture of your brickwork can dramatically improve your home’s curb appeal and make it look years younger. Many homeowners assume this is a difficult job requiring expensive professional services, but with the right approach and a little bit of effort, it’s a project you can handle yourself.
Learning how to clean exterior brick is a valuable skill for any homeowner. Whether you’re dealing with general dirt, green algae, or stubborn stains, there are several effective methods you can use. This guide will walk you through the process step by step, from gentle scrubbing to pressure washing, ensuring you can safely and effectively restore your brick’s original beauty without causing damage.
Why Cleaning Your Exterior Brick is a Smart Move
Regularly cleaning your exterior brick is a key part of home maintenance that goes beyond just aesthetics. It removes harmful buildup like mold, mildew, and algae that can trap moisture and potentially damage the brick and mortar over time. A clean surface also allows you to properly inspect the masonry for any cracks or pointing issues that need repair, preventing small problems from becoming large, expensive ones. Ultimately, a well-maintained brick exterior not only boosts your home’s curb appeal and value but also helps to preserve its structural integrity for years to come.
7 Step-by-Step Guide: How to Clean Exterior Brick
Step 1: Inspect the Brick and Mortar Condition
Before you begin any cleaning, it is essential to inspect the condition of your brickwork. Look closely for any crumbling bricks or cracked, loose, or missing mortar joints. Applying high-pressure water or harsh chemicals to damaged masonry can worsen the problem, forcing water behind the bricks and leading to significant structural issues. If you find any damage, you must repair it before proceeding with any cleaning. This initial inspection is a crucial first step in any brick maintenance plan, ensuring that the surface is sound enough to withstand the cleaning process without sustaining further harm.
Step 2: Choose the Right Cleaning Method
The best method for cleaning depends on the type and severity of the dirt and stains. For general dirt and light grime, a simple scrub with a stiff-bristled brush and a mild detergent solution is often sufficient. For more stubborn issues like algae, mold, or mildew, you may need a specialized masonry cleaning solution or a bleach and water mixture. Pressure washing is a powerful option for large areas but must be used with extreme caution on brick. Always start with the gentlest method possible and only escalate to more aggressive techniques if necessary to avoid damaging the brick surface.
Step 3: Gather Your Tools and Safety Gear
Before you start, gather all the necessary supplies. You will need a stiff, natural-bristle brush (avoid wire brushes, which can damage the brick), buckets, a garden hose with a spray nozzle, and your chosen cleaning solution. If you are using stronger chemicals or pressure washing, you’ll need safety glasses or goggles, waterproof gloves, and protective clothing. If you plan on pressure washing, ensure you have a machine with an adjustable pressure setting and the correct fan-tip nozzle. Having everything ready will make the process smoother and safer.
Step 4: Prepare the Area and Protect Your Plants
Take some time for surface preparation and to protect the surrounding area. Use plastic sheeting and tape to cover any nearby windows, doors, painted surfaces, and metal fixtures to shield them from the cleaning solution. Thoroughly saturate any nearby plants, shrubs, and grass with water from your garden hose. This helps dilute any chemical runoff that might splash onto them, minimizing potential damage. A little preparation goes a long way in preventing accidental damage to other parts of your property and landscape while you focus on the brick. This is a key part of how to clean exterior brick safely.
Step 5: Pre-Soak the Brick Wall with Water
Brick is highly porous. Before applying any cleaning solution, it’s critical to thoroughly wet the entire section of the wall you plan to clean using a garden hose. Soaking the brick ensures that the pores are filled with water. This prevents the brick from absorbing the cleaning solution too deeply, which could lead to discoloration or damage. It also ensures that the cleaner stays on the surface where it can work on the dirt and grime. Let the water soak in for a few minutes before moving on to the next step.
Step 6: Apply the Cleaning Solution and Scrub
Working in small, manageable sections (e.g., a 4×4 foot area), apply your chosen cleaning solution using a garden sprayer or a brush. Let the solution sit on the surface for about 5 to 10 minutes to allow it to break down the dirt, but do not let it dry on the wall. Then, use your stiff-bristled brush to scrub the area in a circular motion. Apply firm, consistent pressure to dislodge stubborn stains and grime from the brick face and mortar joints. Proper scrubbing is a fundamental technique for learning how to clean exterior brick.
Step 7: Rinse the Wall Thoroughly
Immediately after scrubbing a section, rinse it thoroughly with clean water from your garden hose. Start rinsing from the top of the section and work your way down. This prevents dirty water from running down and re-staining the cleaned areas below. Ensure you rinse away all traces of the cleaning solution, as any residue left behind can cause discoloration or attract more dirt over time. Continue this process of applying, scrubbing, and rinsing section by section until the entire wall is clean.
Preventative Maintenance Strategies
To keep your walls looking clean and well-maintained over time, regular preventative maintenance is key. Start by scheduling periodic inspections to identify any signs of mold, mildew, or dirt buildup before they become problematic. Consider applying a high-quality sealant to your walls, which can help protect surfaces from water, dirt, and other contaminants. Trim nearby vegetation to prevent leaves and branches from brushing against the walls, reducing the accumulation of organic debris. Lastly, clean the walls gently with a soft brush or low-pressure water spray every few months to remove surface dirt and prevent stains from settling in. These simple steps can significantly extend the time between deep cleaning sessions, keeping your walls in excellent condition.
Frequently Asked Questions
Can I Use a Wire Brush to Clean My Brick?
No, you should never use a wire brush on brick. The metal bristles are too abrasive and can scratch and gouge the surface of the brick, causing permanent damage. The metal particles can also embed in the brick and mortar, leading to rust stains over time. Always use a stiff, natural-bristle or nylon-bristle brush for cleaning brick.
What Is the Safest Cleaning Solution for Brick?
The safest starting point is a simple solution of mild dish soap or all-purpose cleaner mixed with water. For mold and mildew, a solution of one part household bleach to ten parts water is effective. There are also specialized masonry cleaning products available at hardware stores that are formulated to be safe for brick. Always test any cleaning solution on a small, inconspicuous area first.
How Can I Remove White Stains (Efflorescence) from Brick?
Efflorescence is a white, powdery deposit of salt left on the surface of the brick as water evaporates. Often, it can be removed simply by dry-scrubbing with a stiff brush. If that doesn’t work, you can scrub the area with a mixture of one part white vinegar to five parts water. Rinse the area thoroughly with clean water afterward.
Is It Safe to Pressure Wash Old Brick?
Pressure washing old or historic brick is generally not recommended. Older bricks are often softer and more porous, and the mortar can be much weaker. The high pressure can easily cause irreversible damage, such as spalling (flaking) and mortar erosion. For old brick, it is much safer to stick to gentle hand-scrubbing methods with a soft-bristle brush and a mild cleaning solution.
How Often Should I Clean My Exterior Brick?
The frequency of cleaning depends on your local climate and environment. In general, a light cleaning every few years is sufficient to maintain the appearance and health of your brickwork. If you live in a particularly damp or polluted area where algae or grime builds up quickly, you may need to clean it more often. Regular inspection is more important than a strict cleaning schedule.
Conclusion
Successfully learning how to clean exterior brick is a project that provides immense satisfaction and tangible results, instantly boosting your home’s curb appeal. By choosing the right method for the type of dirt you’re facing and proceeding with patience and care, you can safely restore your brickwork to its original vibrancy. This guide provides a clear path to follow, from simple scrubbing to cautious pressure washing.
This is a manageable DIY task that makes a huge visual impact. Don’t let a layer of dirt and grime detract from the beauty of your home any longer. With the right tools and a bit of effort, you can enjoy a fresh, clean facade that looks as good as new.