How to Power Wash a Brick House

Power washing is an effective and efficient method for cleaning and rejuvenating the appearance of a brick house. Over time, dirt, mold, mildew, and stains can build up on the surface of brick walls, dulling their natural beauty and potentially compromising their integrity.

By removing this buildup, power washing not only restores the home’s aesthetic appeal but also helps extend the lifespan of the brick by preventing long-term damage.

Regular power washing offers numerous benefits, including maintaining a property’s curb appeal, safeguarding against harmful substances like algae and mildew, and preserving the home’s structural integrity.

For many homeowners, it is an essential maintenance task that ensures their house remains clean, attractive, and well-protected against environmental wear and tear.

This article provides a detailed step-by-step guide on how to power wash a brick house effectively and safely to achieve lasting results while preventing unintentional damage to the brick or mortar.

Tools and Materials Needed

Essential Tools 

To successfully power wash a brick house, you’ll require the following tools: 

• Power washer (electric or gas-powered) with an adjustable pressure setting. 
• Extension wand to reach higher areas without excessive strain. 
• Safety gear including goggles, gloves, and non-slip shoes for personal protection. 

Materials 

• Cleaning solution (optional), such as a specialized brick cleaner or degreaser, for more effective stain removal. 
• Hose to supply water to the power washer. 
• Water is the primary cleaning medium. 

Optional Tools 

• Surface cleaner attachment for a more uniform cleaning of flat surfaces. 
• Garden sprayer for evenly applying cleaning solutions to the brick. 
• Ladder for accessing and cleaning elevated sections of the house. 

Safety Equipment 

Always use protective clothing, goggles, and ear protection to shield yourself from debris, pressurized water, and noise produced by the power washer.

Preparing for Power Washing

Thorough preparation is crucial to ensure the safety and effectiveness of power washing your brick house. Follow these steps to set up properly and avoid damage to your property or equipment.

Turning Off Utilities 

Before you begin, turn off outdoor electrical outlets and ensure they are securely covered to prevent water damage. This precaution is essential for avoiding electrical hazards while power washing.

Protecting Surrounding Areas 

Move outdoor furniture, plants, or any delicate items away from the immediate work area to prevent accidental water damage or displacement. Use plastic sheeting or tarps to cover windows, doors, and other vulnerable seals around your house. Also, guard any landscaping or vegetation near the house to protect it from potential overspray or detergent exposure.

Checking the Power Washer 

Scrutinize your power washer before use. Look for any damage or leaks in the hoses and confirm they’re securely connected. If you’re using a cleaning solution, ensure it is mixed correctly and loaded into the washer’s detergent system as per the manufacturer’s instructions.

Testing Pressure Settings 

Begin by selecting a low-pressure setting and testing it on a small, inconspicuous brick portion. Adjust the pressure as needed to ensure it is strong enough to clean while avoiding any damage to the brick’s surface or mortar. This step is critical to avoid unintentional wear or loosening of the brickwork.

Choosing the Right Pressure Setting 

Low vs. High Pressure 

Understanding the difference between low and high-pressure settings is essential when using a power washer on brick surfaces. Low pressure, typically around 1,200 to 1,500 PSI, is generally the safest and most effective for cleaning brick.

This pressure level is strong enough to loosen dirt, mildew, and stains without risking damage to the brick or mortar. High-pressure settings, while effective on tougher materials, can cause cracks, erosion, or chipped mortar on delicate brick surfaces and should be avoided in most cases.

Adjusting the Pressure 

When cleaning, begin with the lowest pressure setting and incrementally increase if necessary to achieve desired results. Be mindful of the type and age of the brick, as older or weaker brickwork may require even gentler pressure to avoid damage. As previously mentioned, testing different settings on an inconspicuous area ensures that the pressure is appropriately matched to the surface being cleaned.

Using the Right Nozzle 

Equally important is the selection of the correct nozzle. A 25- or 40-degree nozzle is generally considered ideal for cleaning brick, providing a wider spray pattern. This disperses the water pressure over a larger area, reducing the likelihood of concentrated force that could harm the surface. Proper nozzle selection and technique make a significant difference in preserving the integrity of the brick while achieving an effective clean.

Applying Cleaner to the Brick

Choosing the Right Cleaner 

Selecting the proper cleaner is crucial for achieving an excellent result while avoiding damage to the brickwork. A mild soap, specially formulated brick cleaner, or a commercial degreaser are all effective options, depending on the nature of the grime or stains. Avoid using acidic or highly abrasive cleaners, as these can compromise the integrity of the brick surface or alter its appearance. For organic stains like mildew and mold, a mildew remover or a diluted bleach solution can be particularly effective, but it’s vital to use them cautiously and follow the manufacturer’s instructions.

Using Detergent with Power Washer 

To apply the cleaning solution, you can use the soap dispenser attachment on your power washer, if available, or a separate garden sprayer. Both methods ensure an even distribution of the cleaner across the brick surface. Once applied, allow the cleaner to sit for several minutes to break down dirt, grime, or stains. This resting period enhances the effectiveness of the cleaner, ensuring a thorough clean without excessive pressure, which could harm the brick.

Cleaning Stubborn Stains 

For challenging stains, especially mildew, mold, or oil spots, additional effort may be required. Use an appropriate stain-specific cleaner and, if necessary, scrub the stained area with a stiff-bristle brush before power washing. This extra step can help loosen stubborn residue and ensure a pristine surface.

Test in Small Area First 

Before using any cleaning solution on the entire surface, always test it in a small, inconspicuous area. This precaution checks for any potential discoloration or damage, helping to safeguard the brick and confirm that the chosen cleaner is both safe and effective for your project. This small step can save a great deal of trouble in the long run.

How to Power Wash a Brick House: Power Washing the Brick Surface 

Starting at the Top 

Begin power washing from the top of the brick wall and work your way downward. This technique prevents streaking and ensures that dirt and grime are effectively removed without redepositing onto areas that have already been cleaned.

Maintaining Distance 

Keep the nozzle of the power washer at least 6 inches away from the brick surface at all times. This precaution helps prevent excessive pressure from damaging the brick and mortar, preserving the integrity of the structure while effectively removing dirt.

Using Even Strokes 

Use steady, overlapping strokes to ensure an even clean across the surface. Move the nozzle in either a horizontal or vertical direction, depending on the size and layout of the brick area. Consistent, even motions help avoid uneven cleaning patterns and missed spots.

Paying Attention to Mortar Joints 

Take extra care around the mortar joints, as these areas can be more vulnerable to pressure damage. Avoid lingering on these spots for too long, and reduce the pressure slightly if necessary to protect the durability of the mortar.

Avoiding Windows and Doors 

Direct the spray away from windows, doors, and seals to prevent water from infiltrating or causing damage to these components. Maintaining this caution helps avoid unnecessary repair or replacement costs associated with water-induced damage. 

By following these steps, you can achieve a clean, well-maintained brick surface while minimizing the risk of harm to the structure.

Rinsing and Final Touches 

Once the brick surface is clean, it’s crucial to rinse off any residual detergent or cleaner thoroughly. Use clean water and methodically spray the brick, ensuring all cleaning agents are removed, as leftover residues can degrade the brick’s appearance over time. 

After rinsing, take a moment to inspect the brick for any remaining stains or problem areas. Look closely for discoloration or spots that might have been missed during the cleaning process. If necessary, use a brush or apply additional cleaner to spot clean these areas. This step ensures a consistently clean finish across the entire surface. 

For small, stubborn spots that resist initial cleaning, consider touching them up with slightly more pressure or a targeted application of cleaner. Be cautious not to damage the brick or mortar by over-applying pressure in these focused areas. 

Finally, allow the brick to air dry completely. Ensure it is fully dry before conducting a final inspection or undertaking any necessary repairs. Dry surfaces make it easier to identify imperfections and ensure your cleaning efforts have been successful. Taking these final steps will leave your brick looking refreshed, clean, and ready for continued use. 

Post-Cleaning Maintenance 

Sealing the Brick (Optional) 

After cleaning, consider applying a brick sealer to protect the surface from future staining and moisture penetration. This step is especially important if you live in a high-moisture area, where bricks are more prone to damage from water absorption. A quality brick sealer creates a protective barrier, extending the lifespan of your brick and reducing the chance of mold or mildew growth. Always follow the manufacturer’s instructions when selecting and applying a sealer for best results. 

Rechecking the Mortar 

Inspect the mortar joints after power washing to check for signs of damage or loosening. Damaged mortar can compromise the structural integrity of your brickwork, leading to further issues down the line. If you find any cracks, gaps, or loose mortar, it is essential to address these concerns promptly. Tuckpointing, or replacing deteriorated mortar, will help maintain the stability and appearance of the brick. 

Regular Cleaning Schedule 

To keep your brick looking its best, establish a regular cleaning schedule. Power washing your brick house every 1-2 years can prevent dirt, stains, and weathering from building up over time. Adjust the frequency based on local weather conditions and the level of dirt and debris exposure to ensure consistent upkeep. 

Touching Up Paint (if applicable) 

If your brick is painted, cleaning may occasionally reveal areas where the paint has been affected or worn away. Take time to touch up these areas with matching paint to preserve the overall look of the brick. A little maintenance goes a long way in keeping your painted brick fresh and vibrant for years to come. 

Conclusion 

Understanding “how to power wash a brick house” is an essential skill for maintaining its beauty and structural stability. Begin by preparing the area, ensuring nearby fixtures and plants are protected. Use the correct pressure settings and a gentle cleaner to avoid damaging the brick or mortar. Regular power washing not only enhances the appearance of your home but also prevents dirt and grime from causing long-term damage. Always prioritize safety by starting with lower pressure and avoiding harsh chemicals that could compromise the brickwork. With proper care, your brick house will remain clean and well-maintained for years to come.