Soft washing a roof is a gentle cleaning method using a low-pressure system to apply cleaning solutions, which helps prevent damage to shingles and other roofing materials. Here’s a step-by-step guide on how to soft wash a roof safely and effectively:
Gather Supplies
- Soft wash system or garden sprayer (designed for low-pressure spraying)
- Roof cleaning solution (often a mix of water, bleach, and surfactant)
- Safety gear: goggles, gloves, and non-slip shoes
- Garden hose for rinsing
- Ladder (if access is required)
Prepare the Roof and Surrounding Area
- Inspect the Roof: Check for any loose shingles or damage.
- Protect Plants and Landscaping: Rinse surrounding plants with water to prevent them from absorbing any runoff of cleaning chemicals, and cover them if necessary.
Mix the Cleaning Solution
- Follow the instructions on the cleaning solution carefully. A common mix includes 3 parts water to 1 part bleach, with a surfactant (soap) to help it stick to the roof surface.
- Use the soft wash system or garden sprayer to mix and apply the solution.
Apply the Solution
- Starting from the top of the roof, spray the cleaning solution onto the shingles. Work in sections to ensure even coverage.
- Allow the solution to sit on the roof for 10-20 minutes, allowing time for mold, algae, and grime to break down. Avoid letting the solution dry completely.
Rinse the Roof
- Using a garden hose or low-pressure rinse, thoroughly rinse the roof from top to bottom.
- Rinse plants and landscaping again to remove any remaining solution.
Inspect the Roof
- Check the roof to see if any areas need a second wash. Repeat the cleaning and rinsing if necessary.
Tips for Safe and Effective Roof Soft Washing:
- Avoid High Pressure: Never use a pressure washer on a shingle roof, as it can damage the surface.
- Work on a Dry, Cool Day: This helps prevent the solution from drying too quickly and ensures the best results.
- Stay Safe: If you’re not comfortable working on a roof, consider hiring a professional.
Soft washing can effectively extend the life of your roof by keeping it free from damaging mold and algae, and it helps maintain its overall appearance.
What Chemicals Do You Use To Softwash A Roof?
Professionals often use a higher concentration of sodium hypochlorite (around 12.5%) combined with water and a surfactant to ensure an effective clean on roofs. This blend not only removes dirt and organic matter but also addresses the root of the issue by killing organisms like mold, lichen, algae, moss, and mildew at the source. This prevents regrowth and extends the period between cleanings.
Breakdown of the Soft Wash Cleaning Solution:
- Sodium Hypochlorite (12.5%): This professional-grade bleach effectively sanitizes and kills unwanted organisms on the roof.
- Water: Usually diluted with a ratio of about 3:1 (three parts water to one part sodium hypochlorite) to ensure the solution is strong enough to clean but not so strong that it risks damaging the shingles.
- Surfactant: Helps the solution adhere to the roof surface, allowing it to penetrate and kill the organisms before it runs off, which is essential for areas with heavy moss or lichen.
This type of cleaning is highly effective but requires careful handling. Sodium hypochlorite in high concentrations can be harsh, so wearing protective gear and thoroughly rinsing surrounding vegetation and surfaces is crucial.
Can You Softwash Your Own Roof?
Yes, you can soft wash your own roof if you have the right equipment, supplies, and knowledge of how to handle cleaning chemicals safely. Homeowners can purchase or rent a soft wash system or a garden sprayer and mix their own solution, usually containing diluted bleach and water, to effectively remove mold, algae, and grime from the roof surface. However, while it’s technically possible to do it yourself, hiring a professional is often the safer and more effective choice.
How Long Does Soft Washing A Roof Last?
A soft-washed roof generally stays clean for 3 to 5 years, depending on climate, sunlight exposure, and roof material. In humid regions, algae and moss may regrow within a year, while sunny areas typically see longer-lasting results. Some roofing materials, like metal, resist buildup better than others. Professionals often apply treatments with algaecides to slow regrowth, further extending the roof’s cleanliness.
Can You Soft Wash With A Pressure Washer?
Yes, you can soft wash with a pressure washer, but only if the machine has a low-pressure setting, often around 100-500 PSI. Soft washing requires minimal pressure to avoid damaging roofing materials, especially on shingle roofs. The key is to use the pressure washer to apply a gentle cleaning solution (usually containing bleach and water) rather than relying on high pressure to scrub away dirt and grime. Many professionals use dedicated soft wash systems instead because they’re designed specifically for this purpose, but a pressure washer with adjustable settings can work if used carefully.
Can You Pressure Wash A Shingle Roof?
Power washing roof shingles is not advised because the high-pressure water can cause significant damage. The intense force strips away the protective granules that shield shingles from sun and weather exposure, potentially loosening them and leading to leaks and expensive repairs. Instead, soft washing uses a gentle, low-pressure approach that effectively removes mold, algae, and grime without risking damage to the shingles.
Takeaway
Soft washing is an effective, low-pressure cleaning method for roofs that avoids the damage caused by high-pressure washing, making it ideal for delicate materials like shingles. Using a blend of water, bleach, and a surfactant, soft washing tackles mold, algae, and grime while protecting roof longevity.
Call Vesta Property Pro today for a free quote on your next roof cleaning.
