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When can you pressure wash new concrete?

washing concrete with a pressure washer

Pressure washing is a powerful cleaning method commonly used to revitalize surfaces, including concrete. However, when it comes to newly poured concrete, timing is crucial to ensure the best results and prevent damage. Here’s what you need to know about pressure washing new concrete and using the right equipment and techniques.

Understanding new concrete

Newly poured concrete undergoes a curing process, gradually hardening and strengthening. This process can take several days to several weeks, depending on factors such as temperature, humidity and the type of concrete mix used. During the curing period, the concrete is still vulnerable to damage from external factors, including pressure washing.

Pressure washing new concrete

 It’s essential to allow new concrete to cure fully before pressure washing to avoid causing cracks, surface damage or compromising its structural integrity. As a general guideline, wait at least 30 days after pouring the concrete before pressure washing it. This waiting period allows the concrete to reach its maximum strength and stability.

Using the right equipment and techniques

 When you pressure wash new concrete, it’s crucial to use the appropriate techniques and pressure washer parts and accessories to minimize the risk of damage. Here are a few tips:

  • Choose a pressure washer system with adjustable settings to control the water spray’s intensity. Look for a unit that delivers around 2,500 to 3,000 PSI of pressure. This is enough pressure for most concrete cleaning jobs without damaging the surface.
  • Use a pressure washer hose with the correct diameter and length to maintain consistent water flow and pressure.
  • Before pressure washing, soak the concrete with water to loosen debris and stains.
  • When pressure washing, hold the nozzle consistently from the surface to prevent uneven cleaning or surface etching. A 40-degree pressure washing nozzle is suitable for general cleaning; a 15-degree nozzle gets into tight spaces, while a zero-degree nozzle is perfect for stubborn stains and removing graffiti.
  • Use mild detergent or a specialized concrete cleaner but avoid harsh chemicals that could harm the new concrete. After making a pass with the soap, use the pressure washer to rinse the concrete with water only.
  • For large-scale projects or commercial applications, consider using an industrial pressure washer designed for heavy-duty cleaning tasks. These high-powered machines offer greater water flow and pressure capabilities, making them ideal for cleaning large areas efficiently and effectively.

Industrial and commercial pressure washer systems in Western Canada and North Dakota

At Hotsy Water Blast, we have more than 1,200 pressure washers in stock, so you’ll find a perfect unit for your needs. We also carry detergents and attachments like water brooms and flat surface cleaners to make cleaning concrete a breeze. Contact us today to find a Hotsy location near you. We’re located in Edmonton , CalgaryLethbridgeRed DeerGrande Prairie, Langley, Regina, Williston and Bismarck, North Dakota.