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Should I Power Wash My Exterior Siding Before Painting?

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When it comes to maintaining your home’s exterior, there’s one piece of advice I always give: focus on exterior maintenance. Whether it’s the siding on your home, the area around your house, or even your garden, everything you do, or don’t do, reflects on the performance and longevity of your property. Today, we’ll explore the world of exterior maintenance, with a particular emphasis on James Hardie siding, and why it’s essential to power wash your exterior siding before painting.

General Maintenance: Yearly Checklist

Every year, it’s crucial to follow a simple checklist to ensure your home’s exterior is in top shape. Here’s what you need to do:

1. Light Washing

Start by giving your exterior siding a light washing. This step is essential to remove dust, dirt, and grime that can accumulate over time. A clean surface is crucial for a successful paint job.

2. Inspect Your Exterior

Take a walk around your house and carefully inspect your siding. Look for any signs of damage, such as cracks, chipping, or peeling paint. Addressing these issues promptly can prevent more extensive problems down the road.

3. Gutters and Downspouts

Make sure your gutters and downspouts are working correctly. Clean them out at least twice a year to prevent clogs. If you neglect this task, it can lead to water damage, which affects the integrity of your siding.

4. Gutter Guards

Consider installing gutter guards to prevent debris from clogging your gutters. This simple addition can save you a lot of trouble and ensure that your exterior system functions correctly.

Repainting and Power Washing

Now, let’s address the importance of power washing your exterior siding before repainting, especially when it comes to James Hardie siding.

With James Hardie siding, you have an advantage over other materials. Unlike wood, aluminum, or vinyl siding, James Hardie doesn’t require power washing before painting. A light washing is sufficient to prepare the surface for painting. Here’s why:

1. Light Washing

Start by gently cleaning your James Hardie siding using a garden hose or a pressure washer set to a low pressure setting. This removes dirt, dust, and any loose paint, ensuring a clean canvas for your paint job.

2. Paint Compatibility

James Hardie siding is compatible with 100% acrylic latex paint. This type of paint adheres well to the surface and provides a beautiful finish. You’ll be amazed at the transformation of your home’s exterior with a fresh coat of paint.

3. Lifelong Beauty

When you repaint your James Hardie siding, it can look as good as new. The durability of this siding means that, with proper maintenance and a new paint job every 15 to 20 years, your home’s exterior will maintain its beauty for a lifetime.

Yearly Maintenance and Gutter Care

To ensure your James Hardie siding continues to shine, it’s essential to keep up with yearly maintenance and gutter care.

1. Annual Inspection

Perform an annual walk-around inspection of your home’s exterior. Look for any signs of damage, including cracks, chips, or peeling paint. Address these issues promptly to prevent further deterioration.

2. Clear Gutters and Downspouts

Keep your gutters and downspouts clear of debris. This not only prevents water damage but also ensures that your siding remains in optimal condition.

3. Prevent Wear and Tear

By keeping your gutters and downspouts clear and in good working order, you’ll minimize wear and tear on your home’s exterior. This means fewer repairs and a longer-lasting, beautiful facade.


In conclusion, if you’re wondering, “Should you power wash your exterior siding before painting?” The answer is clear: for James Hardie siding, a light washing is all that’s needed before applying a fresh coat of paint. This simple step ensures a clean canvas for your paint job and helps your home’s exterior maintain its beauty for years to come.

Remember, proper maintenance is the key to preserving your property’s individual personality and overall curb appeal. If you have any questions or need assistance with your siding maintenance, don’t hesitate to contact us. We’re here to help you transform your home into a lasting masterpiece.

dave donofrio

Dave Donofrio

Owner & CEO

Dave Donofrio is owner and CEO of All Star Products, LLC.  After a two decade career at James Hardie, Dave partnered with the team at All Star to bring advances in exterior remodeling material and technology, while preserving the family friendly, customer oriented approached that been the key to All Star’s success over the last 35 years.


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