Pressure Washing and Sealing: Concrete, Driveways, Decks & Pavers

Pressure Washing & Sealing: Costs, DIY & Professional Tips

Introduction

Concrete driveways, wooden decks, and stone pavers endure daily exposure to the elements. Over time, dirt, mold, and grime accumulate, making surfaces look dull and worn. Pressure washing and sealing restore these surfaces, enhancing their appearance while protecting them from future damage.

Whether you’re tackling the project yourself or hiring professionals, knowing the costs, best practices, and maintenance tips ensures long-lasting results. Let’s break down everything you need to know about pressure washing and sealing.

Comparison Table: DIY vs. Professional Pressure Washing & Sealing

Why Pressure Washing and Sealing Are Important

• Prevents Surface Deterioration: Dirt, mold, and mildew can break down concrete, wood, and pavers over time.
• Enhances Curb Appeal: A clean, sealed surface looks newer and more polished.
• Protects Against Stains & Water Damage: Sealing creates a barrier against oil, moisture, and UV exposure.
• Increases Longevity: Regular maintenance extends the lifespan of driveways, decks, and patios.

DIY Pressure Washing and Sealing

Pros of DIY Pressure Washing and Sealing:

✔ Cost Savings: Spend only on materials and rental equipment.
✔ Flexible Schedule: Work at your own pace.
✔ Basic Equipment Available: Many home improvement stores rent pressure washers.

Cons of DIY Pressure Washing and Sealing:

✖ Requires Skill & Technique: Incorrect pressure settings can damage surfaces.
✖ Time-Consuming: May take an entire day, especially for larger areas.
✖ Shorter Durability: DIY sealants typically last 1–3 years, compared to 3–5 years with professional applications.

DIY Step-by-Step Guide for Pressure Washing and Sealing

Step 1: Gather Equipment

• Pressure washer (1,500–3,000 PSI for decks; 3,000+ PSI for concrete)
• Cleaning solution (biodegradable for wood; degreaser for concrete)
• Sealant (specific to surface type)
• Sprayer, roller, or brush for sealant application

Step 2: Pressure Washing

• Remove debris and furniture from the area.
• Apply a surface-appropriate cleaner and let it sit for 10–15 minutes.
• Use sweeping motions with the pressure washer, maintaining a steady distance to avoid etching the surface.
• Allow the surface to dry completely (24–48 hours).

Step 3: Applying Sealant

• Stir the sealant thoroughly.
• Use a sprayer, roller, or brush to apply an even coat.
• Allow proper drying time before applying a second coat if necessary.
• Avoid foot or vehicle traffic for 24–48 hours.

DIY Cost Breakdown:

• Pressure Washer Rental: $50 – $150/day
• Cleaning Solution: $20 – $50
• Sealant: $50 – $200 (varies by surface type)
• Application Tools: $30 – $100

Total DIY Cost: $100 – $500

Professional Pressure Washing and Sealing

Pros of Hiring a Professional:

✔ More Efficient: Completed in a few hours vs. an entire weekend.
✔ Better Results: Experts use commercial-grade equipment and high-quality sealants.
✔ Longer Durability: Professional sealing lasts 3–5 years, compared to 1–3 years for DIY applications.

Cons of Hiring a Professional:

✖ Higher Cost: Typically $500 – $1,500 depending on area size and condition.
✖ Scheduling Required: Appointments may need to be booked in advance.

Professional Process for Pressure Washing and Sealing:

• Inspection & Pre-Cleaning: Identify stains, cracks, and necessary repairs.
• Deep Cleaning: Use commercial-grade pressure washers and detergents.
• Surface Drying: Ensure complete drying before sealing.
• Sealant Application: Apply a high-performance sealant tailored to the material.
• Curing Time: Allow proper drying before allowing traffic.

Professional Cost Breakdown:

• Driveways: $500 – $1,200
• Decks: $300 – $1,000
• Pavers: $500 – $1,500

Best Sealers for Different Surfaces

Concrete Driveways & Patios

✅ Silane/Siloxane Sealers: Penetrate deep into the concrete, providing long-lasting waterproofing.
✅ Acrylic Sealers: Enhance color while offering UV protection.

Wood Decks

✅ Oil-Based Sealers: Provide deep wood penetration and natural wood enhancement.
✅ Water-Based Sealers: Offer UV protection and resist mildew growth.

Pavers

✅ Wet Look Sealers: Deepen colors and add a glossy finish.
✅ Natural Look Sealers: Maintain the original appearance while adding stain resistance.

Maintenance Tips for Pressure Washed & Sealed Surfaces

• Avoid Harsh Chemicals: Use mild detergents for regular cleaning.
• Reapply Sealant as Needed: Concrete (every 3–5 years), decks (every 1–3 years), and pavers (every 3–4 years).
• Inspect for Cracks or Mold: Address issues early to prevent damage.
• Keep the Area Dry: Ensure proper drainage to prevent moisture buildup.

Frequently Asked Questions

Do you need to seal after pressure washing?

Yes! Pressure washing removes dirt, but without sealing, surfaces remain vulnerable to stains, moisture damage, and UV exposure.

How much does it cost to power wash and seal a deck?

• DIY Cost: $100 – $500
• Professional Cost: $300 – $1,000 (depending on deck size and sealant type)

How to pressure wash and seal a driveway?

• Pressure wash the driveway with a degreaser.
• Allow it to dry for at least 24 hours.
• Apply a penetrating or acrylic sealer with a roller or sprayer.
• Let it cure for 24–48 hours before use.

Do you pressure wash concrete before sealing?

Absolutely! Pressure washing removes oil, dirt, and contaminants, allowing the sealer to bond properly for long-lasting protection.

What happens if you paint without pressure washing?

Painting over dirty surfaces leads to peeling, uneven coverage, and premature wear. Pressure washing ensures a clean base for optimal adhesion.

Pressure washing and sealing are essential for maintaining driveways, decks, and pavers, ensuring they remain durable and visually appealing. While DIY projects can save money, professional services offer longer-lasting protection with expert application techniques. By following the right methods and using quality sealers, you’ll enhance your property’s longevity and curb appeal for years to come.