Pressure washing is an effective method of revitalizing a house and boosting its curb appeal. A property benefits greatly from regular cleaning, and pressure washing can also remove allergens such as dust, mold, and mildew. However, not every surface is safe for pressure washing. Home and business owners should be aware of the limitations of pressure washing and, if need be, hire a professional to ensure safety and prevent damage.

Raleigh pressure washing company First Class Clean is helping local property owners understand the areas to avoid when pressure washing a house or other structure. The company has recently published a blog article entitled “9 Things That You Should Never Pressure Wash.” The article lists the following items:

1. Asphalt Shingles

Pressure washing can remove the grit and granules that protect a roof and can knock whole shingles off of a roof. To preserve asphalt shingles and extend their life, a homeowner should skip this area when cleaning a house with high pressure.

2. Stained Wood

Stained wood surfaces, such as on decking or outdoor furniture, can have the stain pulled from the wood with the heat and pressure of power washing.

3. Lead Paint

Lead paint debris and dust is toxic, and long-term exposure leads to lead poisoning. Pressure washing can damage, crack, and strip the paint, sending dust and debris into the air where it could be inhaled by the unsuspecting homeowner.

4. Old Mortar

High-pressure cleaning methods should not be used on weathered brick walls or other surfaces with mortar. Material can be loosened and stripped away, compromising the integrity of the mortared surface and potentially causing property damage over time.

5. Vehicle

The best way to clean a vehicle is to take it to a car wash or give it a gentle clean with a garden hose. Pressure washing can cause small dents and paint chipping, which leads to rust.

6. Windows

Using high pressure on windows can break, crack, or shatter the glass, which could injure the homeowner or a bystander. A professional can safely clean windows, but a homeowner should not attempt to pressure wash glass surfaces.

7. Gutters

Pressure washing gutters can damage the fascia and even break segments off of the house. The force of the water can cause sags that may leak, rendering an entire gutter system ineffective.

8. AC Units

If the fins of an AC unit are damaged or bent, airflow is compromised. Also, water that gets in the unit itself can wreak havoc on the electrical circuit.

9. Living Things

A pressure washer should never be used on any living thing, including people, pets, and plants. The high PSI can lacerate skin, and the heat can burn. To stay safe, a property owner should only use pressure washing equipment in the manner recommended by the manufacturer.

Hiring a professional pressure washing company is the best option to ensure the wellbeing of families and properties. A team of experts can wash delicate areas of a house that homeowners cannot safely clean by themselves. Also, using a fully licensed and insured company, such as First Class Clean, protects the property owner if an accident does occur. First Class Clean and its trained technicians utilize the latest pressure washing technology to protect families, houses, and investments.

First Class Clean offers a wide range of residential and commercial pressure washing services throughout the greater Raleigh area, including Durham, Apex, Cary, Morrisville, and Holly Springs. The crew of experienced technicians pressure wash homes, buildings, decks, patios, walkways, sheds, awnings, and more. First Class Clean also offers professional window cleaning and concrete cleaning.


To receive a free estimate, visit the First Class Clean website at For more information about pressure washing in Raleigh, contact the staff by email at

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