How To Clean Metal Roof On House

How to Clean Your Metal Roof: A Comprehensive Guide

Maintaining a clean metal roof is crucial for preserving its beauty and extending its lifespan. A dirty roof not only looks unsightly but can also harbor algae, moss, and mildew, potentially leading to damage. This guide provides a step-by-step approach to safely and effectively cleaning your metal roof.

Safety First: Preparing for the Job

Before you even think about grabbing a ladder, safety should be your top priority. Metal roofs can be slippery, and working at heights presents inherent risks.

Essential Safety Gear:

• Ladder: Ensure your ladder is sturdy, extends at least 3 feet above the roofline, and is placed on a stable, level surface.
• Safety Harness: A fall arrest system is highly recommended, especially for larger roofs or those with steep pitches.
• Gloves: Protect your hands from chemicals and rough surfaces.
• Eye Protection: Prevent debris from getting in your eyes.
• Closed-toe Shoes: Provide secure footing.
• Long-sleeved Shirt and Pants: Protect your skin from the sun and potential abrasions.

Assessing Your Metal Roof

Before you start cleaning, take a good look at your roof. Determine the type of metal (aluminum, steel, copper, etc.), its condition, and the extent of the dirt and grime. This will help you choose the appropriate cleaning method and solutions.

Identifying the Severity of the Problem:

• Light Dirt and Dust: A simple rinsing might suffice.
• Moderate Staining and Mildew: A pressure washer with a low-pressure nozzle or a soft brush and cleaning solution will likely be necessary.
• Heavy Algae, Moss, or Lichen: More aggressive cleaning methods may be required, potentially involving stronger solutions and more thorough scrubbing.

Cleaning Your Metal Roof: Step-by-Step

The cleaning method will depend on the level of dirt and the type of metal roofing.

Method 1: Simple Rinsing (for light dirt and dust)

This method is the easiest and requires minimal equipment.

1. Inspect the Roof: Ensure there are no loose or damaged areas.
2. Use a Garden Hose: With a nozzle adjusted to a gentle spray, thoroughly rinse the roof from top to bottom, working your way from one side to the other.
3. Allow to Dry: Let the roof air dry completely.

Method 2: Cleaning Solution and Soft Brush (for moderate staining and mildew)

This method is more effective for removing stubborn stains and mildew.

1. Prepare the Cleaning Solution: Mix a mild detergent (like dish soap) with water. Avoid harsh chemicals that could damage the metal.
2. Apply the Solution: Use a long-handled soft brush to apply the solution to the roof surface. Work in sections, starting from the top and moving down.
3. Scrub Gently: Avoid scrubbing too hard, as this could scratch the metal.
4. Rinse Thoroughly: Rinse the roof with a garden hose, ensuring all the cleaning solution is removed.
5. Allow to Dry: Let the roof air dry completely.

Method 3: Pressure Washing (for heavy algae, moss, or lichen - use caution!)

Pressure washing is the most powerful method, but it can also damage the metal roof if not done correctly.

1. Choose the Right Nozzle: Use a low-pressure nozzle to avoid damaging the metal surface.
2. Maintain a Safe Distance: Keep the pressure washer nozzle at a safe distance from the roof to prevent damage.
3. Work in Sections: Clean the roof in sections, overlapping each pass to ensure complete coverage.
4. Rinse Thoroughly: Rinse the entire roof with clean water.
5. Inspect for Damage: After cleaning, carefully inspect the roof for any signs of damage.

Post-Cleaning Maintenance

After cleaning your metal roof, take these steps to maintain its cleanliness and prolong its life.

• Regular Inspections: Inspect your roof regularly for signs of damage, moss growth, or other issues.
• Gutter Cleaning: Keep your gutters clean to prevent water damage.
• Trim Overhanging Branches: Trim any trees or shrubs that overhang the roof to prevent debris buildup.

By following these steps and prioritizing safety, you can keep your metal roof looking its best for years to come. Remember, if you’re uncomfortable performing these tasks yourself, it's always best to hire a professional roofing contractor.