How to Properly Pressure Wash a Brick House Without Damaging It

Published November 14th, 2025 by Nubirth Pressure Washing

Pressure washing a brick house requires the right tools, careful preparation, and proper technique to protect the structure while restoring its appearance. A pressure washer, combined with nozzle tips, protective gear, and cleaning solution, forms the foundation of a successful cleaning process. Quality pressure washing removes grime, mildew, and dirt buildup that accumulates over time, keeping your home's brick exterior looking fresh and well-maintained without damaging the mortar or surface.

Equipment You’ll Need

Before getting started, gather the essential equipment:

A pressure washer with at least 3000 PSI for effective cleaning

Adjustable spray wand and nozzle tips (15°, 25°, and 40°) for various surface needs

Protective gear, including gloves, goggles, and sturdy shoes

A stable ladder for reaching higher sections safely

Each item plays a crucial role in achieving a thorough clean. Adjustable nozzles enable you to control water pressure for various areas, while protective gear safeguards against injury from debris and contact with cleaning solutions.

How to Prepare the Area

Preparation ensures efficiency and protects surrounding surfaces.

Clear obstacles such as outdoor furniture, garden décor, and potted plants.
Cover nearby greenery with plastic sheets to prevent exposure to cleaning chemicals.
Secure windows, doors, and gutters to stop water intrusion and dislodgement.
Pre-wet lawns and plants to reduce chemical absorption.

This setup minimizes risk and creates a controlled environment for pressure washing your brick home.

Mixing a Safe Cleaning Solution

Combine water with a brick-safe cleaning solution according to the manufacturer’s recommended ratio. This ensures the mixture is strong enough to lift dirt and stains without weakening the mortar. Stir well to form a consistent blend before use. Always wear gloves and eye protection when handling cleaning solutions to avoid irritation. Once mixed, the solution is ready for application.

Testing Pressure Settings

Testing helps you find the ideal balance between cleaning power and brick preservation.

Choose a small, hidden area of the house to test the spray.

Begin with low pressure, about 6–8 inches from the surface.

Gradually increase pressure until the dirt lifts without damaging the bricks.

If chipping or erosion appears, lower the setting immediately. Proper calibration ensures consistent results across the entire surface.

Step-by-Step Cleaning Process

Wet the brick surface thoroughly to loosen debris.
Apply the cleaning solution from bottom to top for even coverage.
Let the solution sit for a few minutes to break down tough stains.
Rinse from top to bottom using a steady, low-pressure stream.

Avoid lingering too long in one spot to prevent etching the brick or mortar. By maintaining even motion and distance, you can effectively remove dirt without causing harm.

Post-Cleaning Care

Once rinsed, inspect the entire house for streaks or spots that need attention. Use a soft-bristled brush and a mild detergent to remove any remaining stains. After cleaning, consider applying a brick sealer to protect the surface from moisture, algae, and future buildup. Regular inspection and occasional touch-ups keep your brick exterior looking vibrant for years.

Properly pressure washing a brick house isn’t just about using high water pressure; it’s about technique, safety, and maintenance. With the right tools, tested settings, and consistent care, homeowners can maintain the durability and curb appeal of their brick exterior.