Exterior Cleaning and Pressure Washing: Keeping Properties Clean and Healthy

Last Updated on May 7, 2025 by Tanya Janse van Rensburg

Exterior cleaning operations maintain residential and commercial properties.

Siding, driveways, decks, and other surfaces accumulate dirt, mold, mildew, algae, and pollution, all of which can cause damage and reduce visual appeal.

Power washing—commonly known as pressure washing—uses strong water sprays to remove buildup from surfaces. It outperforms manual scrubbing by delivering intensive cleaning in less time.

The immediate benefits of pressure washing include improved appearance, reduced allergens, and a lower risk of structural deterioration.

Winston-Salem, North Carolina, like many warm and humid regions, experiences rapid algae, mold, and mildew growth on exterior surfaces.

Regular washing interrupts the development of these microorganisms.

Key Benefits of Pressure Washing

Enhanced Curb Appeal

A property looks more welcoming as soon as the exterior is clean. Pressure washing revitalizes your property and gives it a fresh, like-new appearance.

Curb appeal is critical—clean walls and parking areas leave a strong first impression and signal professionalism.

Preventing Damage

Dirt, mold, and mildew are not just unsightly—they gradually damage surfaces. Mold and moisture seep into cracks in siding and roofing materials, leading to wood rot and concrete deterioration.

Pressure washing removes these contaminants before they cause structural harm.

Health and Safety

Outdoor dirt often carries allergens and bacteria—such as pollen, mold spores, and algae—that reduce indoor air quality and present health risks.

Pressure washing removes these irritants and improves living and working conditions. It also clears walkways of slippery substances like algae and oil.

Time and Cost Efficiency

Pressure washing is far faster than manual scrubbing. With the right equipment, you can clean long driveways or large fences in a fraction of the time.

Whether you hire a professional or rent equipment, the cost is usually far lower than long-term property repair or maintenance.

Eco-Friendly Cleaning

Modern pressure washing methods use eco-friendly practices. Many systems require no harsh chemicals and instead use biodegradable detergents or just water.

These systems use up to 75% less water than a standard garden hose for the same cleaning power.

Regular pressure washing is a budget-conscious, high-impact maintenance solution that can increase property value and improve its marketability.

Best Practices and Safety Considerations

Effective pressure washing depends on using the right methods to prevent damage and stay within legal limits.

Best practices include:

Choose the Right Method

High-pressure washing is ideal for hard surfaces like concrete, brick, and metal. However, it can damage softer materials like wood siding, vinyl, and old mortar.

For delicate surfaces, soft washing—a low-pressure method using detergents and bleach—is safer and equally effective for mold removal.

Preparation

Before starting, remove furniture, toys, and other items from the area. Cover plants and nearby electrical outlets with plastic. Ensure all windows and doors are sealed.

Test a small area before using cleaning agents. Strong solutions often require 5–10 minutes of soaking—but keep the surface wet to prevent re-drying and dirt retention.

Use Proper Equipment and Settings

Select the right nozzle and pressure level for the surface. Always start with low pressure and increase only as needed. A 40-degree wide spray nozzle is gentle enough for siding, decks, and fences.

A 0–15 degree nozzle offers focused cleaning for hard surfaces like concrete. Always wear safety goggles, gloves, and heavy-duty boots. Never spray people, animals, or delicate objects.

Safety and Environmental Care

High-pressure water can cause injury and property damage if misused. Keep at least 6–12 inches away from the surface and use a consistent angle.

Avoid spraying electrical components, vents, or light fixtures. Check local regulations on wastewater runoff and use biodegradable detergents when possible.

Use mats and vacuum systems to capture contaminants during commercial cleaning.

After Cleaning

Rinse all surfaces thoroughly at low pressure to remove any leftover detergent or debris. Inspect your work—some areas may need a second pass.

Allow the area to dry fully. After cleaning, reseal wood or apply protective coatings to decks and fences for a longer-lasting finish.

Proper technique makes all the difference. Use low pressure and test your tools before full use. For large or delicate projects, it’s best to hire a professional.

Contacting a professional power washing company becomes the best option for cleaning delicate surfaces and large areas safely.

Residential vs. Commercial Cleaning

While the basic cleaning methods are similar, residential and commercial properties have different requirements.

Residential Cleaning

Homeowners usually focus on siding, roofs, decks, patios, driveways, fences, and garage floors. Soft washing is best for wood to prevent splintering.

Use moderate pressure on vinyl, stucco, and brick—but always test a small area first. Many homeowners pressure wash seasonally, in spring or fall.

According to Cleanstart, pressure washing “can quickly and efficiently clean large areas, saving time” compared to hand scrubbing.

Commercial Cleaning

Businesses typically need more frequent and extensive cleaning. This includes storefronts, offices, restaurants, warehouses, and industrial facilities.

Common tasks include graffiti removal, oil stain cleaning from parking lots, and grease removal from kitchen exhaust systems.

Regular pressure washing helps maintain a clean, inviting exterior and attracts more customers.

Hiring Professionals vs. DIY

Property owners must choose between doing it themselves or hiring professionals.

When to Hire a Professional

If your property is large, multi-story, or includes sensitive materials (like antique stone or steep roofs), hire a professional with the right tools and training.

As one source notes, “depending on the size of the area, what needs to be cleaned..., it’s often better to hire a commercial power washing company to clean your home, drive, or deck.”

Look for licensed, insured companies with good reviews or Better Business Bureau accreditation.

Ask about their experience with your specific needs (roof cleaning, concrete degreasing), their use of eco-friendly products, and whether their equipment includes hot water, specialty nozzles, and soft-wash systems.

DIY Considerations

For smaller residential tasks, an electric pressure washer (1,500–2,000 PSI) is suitable for patios and decks.

For bigger jobs, like large driveways or stubborn stains, a gas-powered machine (3,000+ PSI) may be needed.

Always read the manual and “start with the lowest setting possible and test it on a hard surface.”

Conclusion

Regular exterior cleaning with pressure washing keeps properties clean, safe, and visually appealing.

It boosts curb appeal, prevents costly damage, and supports healthier environments.

With proper techniques and safety precautions, both homeowners and businesses can protect their investments and enhance property value.

Whether handled as a DIY project or with the help of professionals, pressure washing should be a standard part of property maintenance.

In areas like Winston-Salem, NC—where humidity leads to rapid mold growth—routine cleaning is especially important for maintaining year-round cleanliness and preventing long-term damage.

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