Pressure washing vinyl siding can be an effective method for removing mold and mildew, but it requires careful preparation, the right techniques, and attention to safety to avoid damaging the siding. This comprehensive guide will provide you with the necessary information to tackle vinyl siding mold effectively and efficiently.
Preparation and Safety
Wear Appropriate Protective Gear
Before starting the pressure washing process, it’s crucial to wear the proper safety gear. This includes:
– Safety glasses or goggles to protect your eyes from debris and water splashes
– Gloves to protect your hands from the high-pressure water and any cleaning chemicals
– Hearing protection, such as earplugs or noise-cancelling headphones, to safeguard your hearing from the noise of the pressure washer
– Sturdy, slip-resistant shoes to prevent falls and ensure stability while working
Protect Surrounding Areas
To prevent damage to nearby objects, take the following precautions:
– Remove or cover any outdoor furniture, grills, or other items in the cleaning area with tarps or plastic sheeting
– Cover all exposed electrical components, such as outlets and switches, to protect them from water damage
Prepare the Siding Surface
Before pressure washing, inspect the vinyl siding for any cracks, gaps, or loose panels. Repair these issues to prevent water from seeping behind the siding and causing further mold growth. Additionally, use a stiff-bristle brush or broom to remove any loose dirt, debris, or cobwebs from the surface.
Removing Mold and Mildew
Use a Bleach Solution
Mix a solution of 1 cup of household bleach and 10 cups of water in a spray bottle. Apply this solution directly to the affected areas and let it sit for 5-10 minutes before rinsing. The bleach will help kill and remove the mold and mildew.
Scrub with a Soft Brush or Sponge
For stubborn mold or mildew, use a soft-bristle brush or sponge to gently scrub the affected areas. Avoid using abrasive materials, as they can damage the vinyl siding.
Low-Pressure Washing
After applying the bleach solution and scrubbing, use a low-pressure wash (1,300-1,500 PSI) with a 1-2% SH (sodium hypochlorite) mix to rinse the siding. This low-pressure approach will effectively clean the siding without pushing water behind the panels and causing further mold growth.
Pressure Washing Techniques
Set the Pressure Correctly
Adjust your pressure washer to a setting between 1,300-1,500 PSI. This pressure range is sufficient to clean the vinyl siding without causing damage.
Use a 45-Degree Angle
When pressure washing, hold the wand at a 45-degree angle to the siding and work from bottom to top. This angle will help remove dirt and grime without forcing water behind the panels.
Clean in Sections
Divide the siding into manageable sections and clean each one thoroughly to ensure even coverage and consistent results.
Preventing Mold Growth
Regular Cleaning
Establish a routine cleaning schedule for your vinyl siding, such as annually or bi-annually, to prevent mold and mildew from accumulating.
Repair Leaks and Cracks
Regularly inspect the siding for any cracks, gaps, or loose panels and promptly repair them. This will help prevent water from seeping behind the siding and creating an environment conducive to mold growth.
Use Eco-Friendly Cleaning Products
Choose cleaning products that are safe for the environment, your landscaping, and the siding itself. Avoid harsh chemicals that can damage the vinyl or harm nearby plants and animals.
Additional Tips
Avoid High Pressure
Refrain from using high-pressure settings (above 1,500 PSI) on your pressure washer, as this can force water behind the siding and lead to mold growth.
Utilize Soft Wash Techniques
Soft wash methods, which use a lower pressure and a cleaning solution, are recommended for vinyl siding to prevent damage and effectively remove mold and mildew.
Combine Bleach and Surfactant
For optimal results, use a mixture of bleach and a surfactant, such as Freshwash, to help the cleaning solution penetrate and remove mold and mildew from the siding.
Technical Specifications
- Pressure Washer Settings: 1,300-1,500 PSI
- Bleach Solution: 1 cup of bleach mixed with 10 cups of water
- SH Mix: 1-2% SH mix for low-pressure washing
References
- Advantage Pro Services. (2023, March 6). How To Pressure Wash Vinyl Siding. Retrieved from https://advantageproservices.com/blog/how-to-pressure-wash-vinyl-siding/
- YouTube. (2021, July 17). Cleaning House Siding Mold and Algae in Five Minutes. Retrieved from https://www.youtube.com/watch?v=kffBpOch4aQ
- Pressure Washers Direct. (n.d.). Pressure Washing Vinyl Siding – How to Clean Siding With a Power Washer. Retrieved from https://www.pressurewashersdirect.com/stories/172-How-to-Clean-Siding-With-a-Power-Washer.html
- Mr. Handyman. (2019, September). How to Pressure Wash Vinyl Siding. Retrieved from https://www.mrhandyman.com/blog/2019/september/how-to-pressure-wash-vinyl-siding/
- Reddit. (2022, October 2). What’s this black mildew left on my siding after a high pressure wash? Retrieved from https://www.reddit.com/r/pressurewashing/comments/xtxwqe/whats_this_black_mildew_left_on_my_siding_after_a/