What Size Pressure Washer for a 2 Story House: The Ultimate Guide

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Pressure Washer

Are you tired of spending hours scrubbing away dirt and grime from the exterior of your 2 story house? Well, it’s time to bring in the big guns – a pressure washer! But before you rush to purchase one, it’s crucial to understand the importance of choosing the right size pressure washer for your needs. In this comprehensive guide, we’ll explore the factors to consider, calculate the ideal size, and address some frequently asked questions to help you make an informed decision. So, let’s dive in and discover the perfect pressure washer for your 2 story house!

Understanding the Factors

When it comes to pressure washers, size matters. To determine the ideal size for your 2 story house, it’s essential to consider a few key factors. The first and most crucial factor is water pressure. Higher water pressure ensures efficient cleaning, especially for hard-to-reach areas. Additionally, the flow rate, measured in gallons per minute (GPM), determines how quickly and effectively the pressure washer can tackle the task. Lastly, the cleaning power, measured in cleaning units (CU), combines water pressure and flow rate to give you a comprehensive understanding of the pressure washer’s capabilities.

Calculating the Ideal Size

Determining the ideal size of a pressure washer for your 2 story house doesn’t have to be complicated. Let’s break it down into simple steps:

  1. Assess the surface area: Measure the total surface area of your house that needs to be cleaned. This includes walls, windows, decks, and any other surfaces you wish to spruce up.

  2. Consider the material and stains: Different surfaces and types of dirt require varying levels of water pressure. Delicate surfaces like wood or painted walls may require lower pressure, while concrete or brick may need higher pressure to remove stubborn stains.

  3. Calculate the required cleaning power: Multiply the surface area (in square feet) by the recommended cleaning power (in cleaning units) per square foot. This will give you an estimate of the minimum cleaning power your pressure washer should possess.

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By following these steps, you can determine the approximate size of the pressure washer needed to effectively clean your 2 story house.

Factors to Consider

While the calculated size provides a good starting point, there are additional factors to consider when choosing a pressure washer for your 2 story house. These factors can significantly impact the performance and efficiency of your cleaning tasks. Here are a few to keep in mind:

  • Type of surfaces: Determine the types of surfaces you’ll be cleaning. Are there delicate materials like wood or fragile windows? This will help you select a pressure washer with adjustable pressure settings to prevent damage.

  • Presence of stubborn stains: If your house has accumulated tough stains over time, such as oil or mildew, you might need a pressure washer with higher cleaning power to effectively remove them.

  • Power source availability: Consider the availability of power sources near your cleaning area. If your 2 story house is far from electrical outlets, a gas-powered pressure washer might be a more suitable option.

By taking these additional factors into account, you can fine-tune your pressure washer selection process for optimal results.

FAQ (Frequently Asked Questions)

What is the minimum pressure required for cleaning a 2 story house?

The minimum pressure required for cleaning a 2 story house typically ranges from 1,500 to 2,000 pounds per square inch (PSI). However, it’s important to remember that the required pressure may vary depending on the specific surfaces and stains you’re dealing with. Always refer to the manufacturer’s guidelines and adjust the pressure accordingly.

Can I use a smaller pressure washer for a 2 story house?

While it may be tempting to opt for a smaller pressure washer to save money or storage space, using one that lacks sufficient power can result in inefficient cleaning. It might take longer to complete the task, or you may need to resort to using excessive pressure, which could damage delicate surfaces. It’s best to choose a pressure washer with the recommended cleaning power for your 2 story house.

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What happens if I use a pressure washer with excessive power?

Using a pressure washer with excessive power can lead to unintended consequences. It may cause damage to surfaces, strip off paint, or even injure yourself or others. Always follow the manufacturer’s guidelines and exercise caution when operating a pressure washer to ensure safe and effective cleaning.


In conclusion, selecting the right size pressure washer is crucial for efficiently cleaning your 2 story house. By considering factors such as water pressure, flow rate, and cleaning power, you can determine the ideal size that suits your specific needs. Additionally, taking into account the type of surfaces, presence of stubborn stains, and power source availability will further enhance your pressure washer selection process. Remember, a well-chosen pressure washer will not only save you time and effort but also ensure a sparkling clean home. So, invest wisely and enjoy the benefits of a perfectly cleaned 2 story house with the ideal size pressure washer!

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