Brick is one of the most durable and beautiful materials you can use on a home. It’s classic, low-maintenance, and built to last — but it’s not indestructible. Over time, even brick can get grimy, stained, or covered in mold and mildew.
That’s where power washing comes in… or does it? 🧐
Many homeowners wonder if blasting their brick with high-pressure water is a good idea or a one-way ticket to cracked mortar and long-term damage. This article breaks down the risks, the benefits, and the safest way to power wash brick without ruining your exterior.
🧼 Can You Power Wash Brick?
Yes — you can power wash brick, but you have to do it correctly. Brick is tough, but it’s also porous and held together with mortar, which is more fragile than it looks. Using too much pressure or the wrong technique can:
- Crack the mortar
- Loosen bricks
- Force water behind the wall
- Leave uneven marks or streaks
- Shorten the life of your brickwork
So, while power washing can be effective, it has to be done with care. ✅
🧱 Why Brick Needs Cleaning in the First Place
Brick, like any other surface, collects:
- Dirt and dust
- Mildew and mold
- Algae (especially on north-facing walls)
- Rust stains (from metal fixtures)
- Efflorescence (white powdery mineral deposits)
Left untreated, this buildup can:
- Make your home look aged or neglected
- Trap moisture inside the brick
- Encourage organic growth in mortar joints
- Reduce property value over time
💡 Regular cleaning preserves both the appearance and integrity of your brickwork.
🔧 When Power Washing Brick Is NOT Recommended
Before you touch your power washer, inspect the condition of your brick. Do not power wash if:
- The mortar is loose, crumbling, or missing
- There are deep cracks in the wall
- You have historical brick or soft handmade brick
- The brick is painted and chipping
In these cases, manual cleaning or soft washing is safer. Power washing damaged brick can lead to bigger structural issues.
⚙️ Equipment You’ll Need
If your brick is in good shape, you can safely power wash it using the right tools:
- Pressure washer (1,500–2,000 PSI) — gas or electric
- 25° or 40° spray nozzle (wide angle)
- Biodegradable detergent or brick cleaner
- Garden hose
- Protective gear (goggles, gloves, boots)
- Scrub brush (for tough spots)
📏 Never use a 0° or 15° tip on brick — it’s too focused and powerful.
🧪 Step-by-Step: How to Power Wash Brick Safely
Follow this process to clean your brick without damaging it:
Step 1: Inspect the Surface 👀
Look for cracks, flaking mortar, or weak areas. Seal or repair these spots before proceeding.
Step 2: Wet the Brick First 💧
Before applying detergent or pressure, wet the entire area with a garden hose. This helps prevent the cleaner from soaking in too fast.
Step 3: Apply Brick Cleaner 🧼
Use a detergent made specifically for masonry or pressure washers. Apply from bottom to top to avoid streaks.
Let it sit for 5–10 minutes — but don’t let it dry.
Step 4: Start Spraying (Low and Wide) 🎯
Using a 25° or 40° nozzle, spray the brick from about 12–18 inches away. Move in smooth, overlapping horizontal strokes. Start at the top and work your way down.
🚫 Don’t linger in one spot too long — it can gouge the surface.
Step 5: Rinse Thoroughly 💦
Once clean, rinse with a garden hose or the washer on a low-pressure setting to remove all soap residue.
Step 6: Inspect and Touch Up 🧽
Use a soft brush to clean any stubborn spots by hand. Rinse again if needed.
Let the wall dry completely before applying any sealant or paint.
🧽 What About Sealing Brick?
After cleaning, you may want to apply a brick sealant to protect against future buildup. This:
- Repels water and moisture
- Prevents mildew growth
- Makes future cleanings easier
However, not all bricks need sealing. Consult a masonry professional if you’re unsure.
🧱 Never seal brick that still feels damp or has trapped moisture — it can cause bubbling or cracking.
🧠 Pro Tips for Better Results
- Avoid cleaning in direct sunlight — the cleaner will dry too quickly
- Test a small area first to check pressure and results
- Work in manageable sections — don’t rush large areas
- Don’t forget safety gear — debris and backsplash are common
📸 Take a “before and after” photo — it’s always satisfying!
🛑 Mistakes to Avoid
Even experienced DIYers can mess up brick cleaning if they’re not careful. Here’s what NOT to do:
- Don’t use harsh acids or bleach
- Don’t use too much pressure
- Don’t power wash damaged or old brick
- Don’t forget to rinse — leftover cleaner can cause streaks
- Don’t forget that soft washing is safer for delicate areas
When in doubt, call a professional who specializes in masonry cleaning. 🧰
✅ Final Thoughts: Power Wash Brick the Smart Way
Brick may be durable, but it still requires thoughtful care. When done right, power washing can bring your walls, patios, chimneys, and walkways back to life — safely and effectively.
So is power washing brick safe?
Yes — as long as you know what you’re doing. Use the right pressure, technique, and cleaning agents, and your brick will thank you with years of strength and style.
🧼💪 Don’t skip the details — clean smart, not just hard.
