Asphalt may seem as tough as concrete, but it is actually a much softer and more delicate surface. Because of its composition—made of sand, stone, and a binder called bitumen—it reacts very differently to pressure washing. Using high-pressure water can cause more harm than good.
1. High Pressure Breaks Down the Binder
The binder in asphalt is what holds the gravel and sand together. Strong water pressure can loosen or strip away this material, leaving the surface brittle and prone to crumbling.
2. Creates Cracks and Potholes
Once the binder is weakened, small cracks can form. Over time, these cracks can expand into potholes, especially when water seeps in and freezes during colder months.
3. Shortens the Lifespan of the Pavement
While pressure washing may make asphalt look cleaner temporarily, it actually reduces its durability. This can lead to costly repairs or the need for resurfacing much sooner than expected.
4. Better Alternatives Exist
Instead of pressure washing, asphalt should be cleaned using gentle methods like sweeping, blowing, or rinsing with low-pressure water. For deeper cleaning, professional services often use specialized detergents and soft washing techniques that won’t damage the surface.
Bottom Line
Pressure washing is great for concrete, brick, and other hard surfaces, but asphalt requires a gentler touch. Preserving the integrity of the binder and preventing cracks is key to extending the life of your parking lot or driveway.
For a free pressure washing or parking lot maintenance quote visit bcs-services.com or contact matt@bcs-services.com
