Blog

Pressure washing your house’s exterior can be an effective way to remove dirt, grime, and mildew that has accumulated over time.

When it comes to pressure washing a house with Hardie Plank siding, there are a few important things to keep in mind. Hardie Plank is a type of fiber cement siding that is popular for its durability and low maintenance. However, it is essential to take precautions when pressure washing this type of siding to avoid damaging it.

Firstly, before you start pressure washing, it is crucial to inspect the siding for any signs of damage or loose boards. Pay close attention to areas where the siding may have been nailed or fastened to the house. If you notice any loose or damaged sections, it is recommended to fix them before proceeding with pressure washing.

Secondly, before you begin pressure washing, it is essential to protect your landscaping and nearby plants by covering them with plastic sheeting or tarps. The high pressure of the water can damage delicate plants or wash away soil, so it is crucial to take precautions to avoid any unnecessary harm to your garden.

When pressure washing the Hardie Plank siding, it is recommended to use a low-pressure setting to prevent any potential damage. High-pressure settings can cause the water to penetrate through the siding, leading to moisture damage or even mold growth. Start with a low-pressure setting and gradually increase if necessary, but always be cautious not to exceed the manufacturer’s recommendations.

Guidelines for Pressure Washing a House with Hardie Plank Siding

If you have a Hardie Plank siding on your house, pressure washing can be an effective way to remove dirt, grime, and mildew buildup. However, it is important to follow the proper guidelines to ensure that you do not damage the siding or cause any other issues. Here are some guidelines for pressure washing a house with Hardie Plank siding:

1. Prepare the area

Before you begin pressure washing, make sure to prepare the area around your house. Close all windows and doors to prevent water from entering your home. Remove any outdoor furniture, plants, or decorations that may be in the way. Cover electrical outlets and outdoor fixtures with plastic bags to protect them from water damage.

2. Use the right pressure setting

When pressure washing Hardie Plank siding, it is important to use the right pressure setting on your pressure washer. Hardie Plank is a durable material that can withstand higher pressure, but you should still use caution. Start with a lower pressure setting and gradually increase it if needed. Avoid using excessive pressure, as it can damage the siding or cause water to seep behind it.

3. Use the right nozzle and spray pattern

Choose a nozzle and spray pattern that is appropriate for cleaning Hardie Plank siding. A wide spray pattern is typically recommended for cleaning larger areas, while a narrow spray pattern may be more effective for tackling stubborn stains. Experiment with different nozzles and spray patterns to find what works best for your specific situation.

4. Maintain a safe distance

When pressure washing Hardie Plank siding, it is important to maintain a safe distance between the nozzle and the siding. Getting too close can increase the risk of causing damage or creating etching marks. As a general rule, aim to keep the nozzle at least 12-18 inches away from the siding surface.

5. Work in sections

Instead of trying to pressure wash the entire house at once, it is recommended to work in smaller sections. This will allow you to have better control over the cleaning process and ensure that you do not miss any spots. Start from the top and work your way down, overlapping the sections slightly to ensure even cleaning.

By following these guidelines, you can safely and effectively pressure wash a house with Hardie Plank siding. Remember to always use caution and test a small inconspicuous area before cleaning the entire surface. If you are unsure or have any concerns, it is best to consult a professional pressure washing service.

Preparation and Safety Measures

Prior to pressure washing your house with Hardie Plank siding, it is important to take certain precautions and prepare the area properly. Follow these steps to ensure a safe and effective cleaning process:

1. Clear the area

Remove any obstacles and clutter from the area around your house. This includes patio furniture, planters, and any other items that could potentially be damaged by water or debris during the cleaning process. Cover delicate plants and flowers with plastic tarps to protect them.

2. Inspect the siding

Before you start pressure washing, inspect the Hardie Plank siding for any loose or damaged pieces. Replace or repair any damaged sections to prevent further damage during the cleaning process.

3. Wear protective gear

It is essential to wear proper protective gear, including safety goggles, gloves, and closed-toe shoes, while pressure washing. This will help protect you from flying debris, water splashes, and chemical cleaners that may be used.

4. Cover electrical outlets

Before starting, cover any electrical outlets or components near the area you will be pressure washing. Use plastic bags or waterproof covers to prevent water from entering and causing electrical hazards.

5. Use the appropriate cleaning solution

Choose a cleaning solution that is specifically designed for use on Hardie Plank siding. Follow the manufacturer’s instructions for dilution ratios and application methods. Apply the solution to the siding using a low-pressure spray or a brush.

6. Test the pressure washer

Before applying high-pressure water to your house, test the pressure washer on a small inconspicuous area of the siding. This will ensure that the pressure is not too high, which could cause damage to the siding or paint.

7. Start at a safe distance

When you begin pressure washing, start at a safe distance from the siding. Gradually move closer until you find the optimal distance that effectively removes dirt and grime without causing damage.

By following these preparation steps and taking proper safety measures, you can successfully pressure wash your house with Hardie Plank siding, restoring its beauty and prolonging its lifespan.

Choosing the Right Equipment and Pressure Settings

When pressure washing your house with Hardie Plank siding, it’s important to choose the right equipment and pressure settings to avoid damaging the surface. Here are some guidelines to help you make the right choices.

1. Selecting the Pressure Washer

To clean your Hardie Plank siding effectively, you’ll need a pressure washer with a minimum PSI (pounds per square inch) rating of 1500 to 2000. This will provide enough power to remove dirt, grime, and mold without causing any damage. You can either purchase or rent a pressure washer, depending on your needs and budget.

2. Choosing the Nozzle and Pressure Settings

When pressure washing Hardie Plank siding, it’s best to use a wide-angle nozzle, such as a 25- or 40-degree nozzle. This helps to distribute the water evenly and reduces the risk of accidentally causing dents or cracks in the siding. Avoid using narrow-angle nozzles like 0- or 15-degree ones, as they can be too concentrated and may cause damage.

Additionally, it’s important to adjust the pressure settings on the pressure washer. Start with a lower pressure setting and increase gradually if needed. Avoid using maximum pressure, as this can also damage the siding. If you’re unsure about the appropriate pressure setting, test a small inconspicuous area before proceeding with the entire house.

Remember to maintain a consistent distance of around 12 to 18 inches between the nozzle and the siding. This will help ensure an even and thorough cleaning without any damage.

Cleaning Solutions and Techniques

When pressure washing a house with Hardie Plank siding, it’s important to use the right cleaning solutions and employ the correct techniques to ensure a thorough and safe cleaning process. Here are some of the recommended cleaning solutions and techniques for pressure washing Hardie Plank siding:

1. Cleaning Solutions

For general cleaning of Hardie Plank siding, a mixture of mild detergent and water can be used. It’s important to avoid using harsh chemicals or solvents as they can damage the siding. A solution of one part mild detergent to four parts water is usually sufficient for regular cleaning.

If there are specific stains or areas of mold or mildew, a solution of one part bleach to four parts water can be used. Apply this solution to the affected areas and let it sit for a few minutes before rinsing it off with the pressure washer.

2. Techniques

When pressure washing Hardie Plank siding, it’s important to follow these techniques to ensure a thorough and even cleaning:

1. Start by wetting the siding with plain water from top to bottom. This helps to loosen dirt and debris.
2. Apply the cleaning solution to the siding using a low-pressure spray nozzle. Start from the bottom and work your way up to prevent streaking.
3. Let the cleaning solution sit on the siding for a few minutes to allow it to penetrate and break down any dirt or stains.
4. Using the pressure washer, rinse off the cleaning solution from top to bottom, making sure to keep the nozzle at a downward angle to prevent water from getting behind the siding.
5. If necessary, repeat the cleaning process for stubborn stains or heavily soiled areas. Adjust the pressure of the washer as needed, but be cautious not to use too high of a pressure as it can damage the siding.
6. After rinsing off the cleaning solution, inspect the siding for any missed spots or lingering stains. Repeat the cleaning process if necessary.
7. Finally, allow the siding to air dry completely before painting or applying any treatments or sealants.

Following these recommended cleaning solutions and techniques will help you properly pressure wash your Hardie Plank siding, keeping it clean and looking its best for years to come.

Tips and Precautions
1.	Always wear protective gear, such as goggles and gloves, when pressure washing.
2.	Test the cleaning solution on a small, inconspicuous area of the siding before applying it to the entire surface.
3.	Maintain a safe distance (at least 12-18 inches) between the pressure washer nozzle and the siding to prevent any damage.
4.	Avoid spraying directly at windows, doors, or any delicate surfaces to prevent breakage or damage.
5.	Consider using a pressure washer with an adjustable nozzle to control the pressure and prevent any accidental damage.
6.	Always read and follow the manufacturer’s instructions for both the pressure washer and the cleaning solutions.

Pressure Washing Process for Hardie Plank Siding

Pressure washing is an effective way to clean and restore the appearance of your Hardie Plank siding. However, it is important to follow the proper process to ensure that you don’t damage the siding or force water behind it. Here are the steps to pressure wash your Hardie Plank siding:

1. Prepare the area: Before you begin pressure washing, make sure to remove any obstacles or debris that may be in the way. Cover nearby plants and bushes with drop cloths or plastic to protect them from the water and cleaning solution.
2. Select the right pressure washer: Use a pressure washer with a maximum pressure of 1500-2000 psi. Anything higher can cause damage to the siding.
3. Mix the cleaning solution: Create a solution of water and a mild detergent or specialized siding cleaner. Follow the manufacturer’s instructions for the correct ratio.
4. Wet the siding: Before applying the cleaning solution, thoroughly wet the siding with plain water. This helps to prepare the surface and prevent the cleaning solution from drying too quickly.
5. Apply the cleaning solution: Using a low-pressure nozzle, apply the cleaning solution to the siding, starting from the bottom and working your way up. Allow the solution to sit on the siding for a few minutes to break down any dirt or grime.
6. Scrub the siding: Use a soft-bristle brush or sponge to scrub the siding in a circular motion. Pay extra attention to any areas with stubborn stains or mold. Avoid using abrasive scrub brushes or steel wool, as they can scratch the surface of the siding.
7. Rinse the siding: Once you have scrubbed the siding, use a high-pressure nozzle to rinse off the cleaning solution. Make sure to rinse from top to bottom to prevent streaking.
8. Inspect the siding: After rinsing, take a close look at the siding to ensure that all dirt and stains have been removed. If necessary, repeat the cleaning process in areas that need extra attention.
9. Allow the siding to dry: Give the siding ample time to dry before applying any paint or sealant. This will help to prevent moisture from getting trapped and causing damage.
10. Dispose of cleaning solution properly: Follow local regulations for disposing of the cleaning solution and rinse water. Avoid letting it enter storm drains or natural water sources.

By following these steps, you can effectively pressure wash your Hardie Plank siding and restore its original beauty. Remember to always prioritize safety and follow the manufacturer’s guidelines for your specific siding to avoid any potential damage.

Cleaning Hardie Plank Siding in Various Weather Conditions

When it comes to cleaning Hardie Plank siding, weather conditions can play a significant role in the process. Depending on the climate and time of year, you may need to adjust your approach to ensure the best results. Here are some tips for cleaning Hardie Plank siding in different weather conditions:

Hot Weather

In hot weather, it’s best to clean Hardie Plank siding in the early morning or late afternoon when the temperatures are cooler. This will prevent the cleaning solution from drying too quickly, allowing it to penetrate and loosen dirt and grime effectively. Keep in mind that high temperatures can cause the cleaning solution to evaporate faster, so it’s essential to work quickly and rinse thoroughly.

Cold Weather

Cleaning Hardie Plank siding in cold weather requires some extra precautions. If the temperature is below freezing, avoid using water or any cleaning solution as it can freeze and potentially damage the siding. Instead, focus on dry cleaning methods such as dusting or using a soft brush to remove debris. Wait for warmer temperatures to tackle any deep cleaning tasks.

Rainy Weather

While it may seem counterintuitive, cleaning Hardie Plank siding during rain can be beneficial. Rainwater can help rinse off loose dirt and debris, making the cleaning process more manageable. However, avoid cleaning during heavy rainstorms or when there is a chance of lightning. Also, ensure that the excess water is not allowed to pool or seep into any gaps in the siding, as this can lead to moisture-related issues.

Table: Cleaning Hardie Plank Siding in Different Weather Conditions

Weather Condition	Best Approach
Hot Weather	Clean in the early morning or late afternoon to prevent the cleaning solution from drying too quickly. Work quickly and rinse thoroughly.
Cold Weather	Avoid using water or cleaning solutions when the temperature is below freezing. Focus on dry cleaning methods and wait for warmer temperatures for deep cleaning.
Rainy Weather	Cleaning during rain can help rinse off loose dirt and debris. Avoid heavy rainstorms and ensure excess water does not pool or seep into gaps in the siding.

By considering the weather conditions and adjusting your cleaning approach accordingly, you can effectively clean and maintain your Hardie Plank siding throughout the year.

Maintenance Tips and Best Practices

Maintaining the appearance and condition of your Hardie Plank siding is essential for preserving its durability and enhancing the curb appeal of your home. Here are some maintenance tips and best practices to follow:

• Inspect Regularly: Conduct a visual inspection of your siding at least once a year to identify potential issues such as cracks, gaps, or signs of moisture damage.
• Clean Regularly: Pressure washing your Hardie Plank siding annually is recommended to remove dirt, grime, mold, and mildew. Be sure to use a low-pressure setting and the appropriate cleaning solution to prevent any damage.
• Avoid Harsh Chemicals: When cleaning your siding, avoid using abrasive cleaners or chemicals that can cause discoloration or damage to the surface. Stick to mild soap solutions or specific cleaners recommended for fiber cement siding.
• Remove Stains Promptly: If you notice any stains on your siding, address them promptly. Use a soft brush or sponge and gentle cleaning solution to spot clean the affected area. Avoid scrubbing too vigorously to prevent surface damage.
• Avoid High-Pressure Settings: When using a pressure washer, always set it to a low-pressure setting to prevent any damage to the siding or paint. High-pressure settings can cause water intrusion or even strip off the paint layer.
• Inspect Caulking and Seals: Check the caulking around windows, doors, and any other penetrations to ensure they are intact and properly sealed. Replace any damaged or deteriorated caulking to prevent water infiltration.
• Trim Trees and Shrubs: Trim any overhanging branches or vegetation near your siding to prevent moisture accumulation, mold growth, and potential damage from falling branches.
• Protect from Hail or Impact: If your area is prone to hailstorms or potential impact from debris, consider installing storm shutters or impact-resistant film to protect your siding from damage.
• Paint and Seal: If your Hardie Plank siding is painted, consider repainting it every 5-10 years to maintain its appearance and protect it from UV rays and weathering. Use a high-quality exterior paint and follow the manufacturer’s recommendations.
• Consult a Professional: If you are unsure about the maintenance or repair tasks required for your Hardie Plank siding, it is always best to consult a professional contractor or manufacturer for guidance and assistance.

By following these maintenance tips and best practices, you can ensure the longevity and beauty of your Hardie Plank siding for years to come.

FAQ

Do I need to pressure wash my house with Hardie Plank siding?

Yes, it is recommended to pressure wash your house with Hardie Plank siding to keep it clean and prolong its lifespan.

Can I pressure wash my house with Hardie Plank siding by myself?

Yes, you can pressure wash your house with Hardie Plank siding by yourself, but be sure to follow the proper safety guidelines and have the necessary equipment.

What pressure should I use to wash a house with Hardie Plank siding?

It is recommended to use a pressure washer with a maximum pressure of 1,500 to 2,000 psi when washing a house with Hardie Plank siding. Higher pressures can damage the siding.

Do I need to use any cleaning solutions when pressure washing a house with Hardie Plank siding?

Yes, it is recommended to use a mild detergent or a mixture of water and bleach to remove dirt, mold, and mildew from the siding. Be sure to properly dilute the cleaning solution and rinse it off thoroughly.

Is it necessary to protect windows and doors when pressure washing a house with Hardie Plank siding?

Yes, it is important to cover or protect windows and doors when pressure washing a house with Hardie Plank siding to prevent water from seeping inside. You can use plastic sheeting or specialized covers for this purpose.