Roof Cleaning in Janesville, WI

Wisconsin's humid climate creates ideal conditions for moss, algae, and lichen growth that can seriously compromise your roof's appearance, performance, and lifespan. These organic contaminants don't just create unsightly dark streaks and green patches - they actually feed on the limestone filler in asphalt shingles. Left untreated, biological growth can void manufacturer warranties, reduce energy efficiency by absorbing heat, and necessitate premature roof replacement.


Roof cleaning requires specialized techniques and equipment to safely remove organic growth without damaging delicate roofing materials or voiding warranties. Traditional high-pressure methods can strip protective granules, loosen shingles, and force water under roofing materials, creating new problems while attempting to solve existing ones. Professional soft washing uses controlled pressure combined with targeted biocide treatments that kill organisms at the root level, ensuring thorough removal and extended protection against regrowth.


Janesville Superior Roofing employs proven cleaning methods that effectively eliminate moss, algae, and staining while preserving your roof's structural integrity and manufacturer warranties. Our experienced team uses biodegradable cleaning solutions and proper safety protocols to deliver comprehensive results that restore your roof's original appearance and functionality. We understand that proper roof maintenance involves more than aesthetics - it's about protecting your investment.

CONTACT US >

Our Professional Roof Cleaning Services

We provide thorough roof cleaning tailored to various roofing materials, using methods that protect integrity and extend lifespan. Our solutions balance effectiveness with safety and environmental responsibility to keep your home in optimal condition.

Types of Roofs We Clean

We work on a wide range of roofing types, including asphalt shingles, metal, tile, and wood shakes. Each material demands specialized techniques to avoid damage and maintain appearance.



For asphalt shingles, we remove moss, algae, and debris carefully to prevent granule loss. Metal roofs receive gentle cleaning that avoids scratching or corrosion. Tile roofs require attention to fragile surfaces and mortar joints. Wood shakes are treated to minimize wetting and decay risks.

Advanced Cleaning Techniques

We employ low-pressure washing and soft wash methods designed to clean without harming your roof. High-pressure washing can cause damage, so we avoid it except for specific cases where materials are resilient.


Our soft wash process uses specialized detergents to break down organic growth like moss and algae. We also treat roofs with protective solutions to inhibit future buildup.

Eco-Friendly Cleaning Solutions

We prioritize cleaning products that are biodegradable and non-toxic to plants, pets, and people. Our environmentally responsible approach reduces runoff impact and aligns with local regulations.



Our cleaning agents are chosen to effectively eliminate biological growth while minimizing chemical residue. This method protects nearby landscaping and groundwater.

Benefits of Regular Roof Cleaning

Maintaining a clean roof supports the structural health and appearance of your home. It also helps avoid unexpected expenses related to damage and repairs.

Extending Roof Lifespan

Accumulated debris, algae, moss, and lichen hold moisture against roofing materials. This moisture can cause shingles or tiles to deteriorate faster than usual. Regular cleaning removes these contaminants before they cause damage.



By preventing moisture buildup, we reduce the risk of rot and premature aging of your roof. This maintenance step can add years to the usable life of your roofing system. It also helps preserve roofing warranties that often require routine care.

Improving Curb Appeal

A clean roof significantly enhances your home's exterior appearance. Stains from algae, moss, and dirt can make a well-maintained house look neglected.



We remove these unsightly marks, restoring a fresh and uniform look to your roof. This boost in visual appeal can improve your home's market value and neighborhood standing.

Preventing Costly Repairs

Left unchecked, organic growth and debris cause wear that leads to leaks and structural damage. Addressing these problems early through cleaning prevents expensive repairs.



Blocked gutters and drains from debris build-up can cause water pooling and roof damage. Cleaning helps maintain proper water flow and drainage.

Why Choose Janesville Superior Roofing

We focus on delivering expert roof cleaning services with a deep understanding of Janesville's local environment. Our dedication to quality and clear communication ensures you receive trustworthy and efficient service tailored to your needs.


Experienced Local Team


Our team has years of experience working specifically in Janesville and the surrounding areas. We understand the unique weather patterns and common roofing materials here, allowing us to provide cleaning methods that maintain your roof’s integrity. Every technician is trained in the latest roof cleaning techniques and safety standards. This knowledge helps us remove dirt, algae, and debris effectively without damaging your shingles or roof surface. 


Commitment to Quality


We use professional-grade equipment and environmentally safe cleaning solutions. Our process is designed to be thorough yet gentle, preserving your roof’s appearance and extending its lifespan. Before any work begins, we perform a detailed inspection to identify problem areas and potential risks. This approach minimizes surprises and ensures that cleaning contributes positively to your roof’s health.


Satisfaction Guarantee


We prioritize clear communication at every step, from initial estimate to project completion. Our team is available to answer questions and adjust plans according to your preferences. If you are not completely satisfied with the results, we address your concerns promptly. We stand behind our work with a satisfaction guarantee, aiming to build lasting trust within our community.

Frequently Asked Questions About Roof Cleaning


  • How much does professional roof cleaning cost?

    Professional roof cleaning costs depend on your roof's size, pitch, condition, and the extent of cleaning needed. Factors like moss and algae coverage, accessibility, and additional services like gutter cleaning affect the investment. At Janesville Superior Roofing, we provide detailed free estimates that include all cleaning solutions, equipment, and safety measures required. 

  • What is the best method for cleaning my roof safely?

    Soft washing is the safest and most effective method for cleaning roofs without damaging shingles or voiding warranties. This low-pressure technique uses specialized cleaning solutions to kill moss, algae, and bacteria at the root level, then rinses with controlled water pressure. Unlike high-pressure washing that can strip protective granules and force water under shingles, soft washing preserves material integrity while achieving thorough, long-lasting cleaning results.

  • How often should I have my roof professionally cleaned?

    Most Wisconsin roofs benefit from professional cleaning every 2-3 years, though frequency varies based on environmental conditions and roof orientation. Homes with significant tree coverage, north-facing sections, or poor air circulation may need annual cleaning. Roofs in sunny, well-ventilated locations can often go 3-4 years between cleanings. We recommend cleaning when you notice dark streaking, green discoloration, or visible moss growth.

  • What's included in a complete roof cleaning service?

    Our complete roof cleaning service includes thorough inspection of roof condition, application of specialized biocide treatments to kill moss, algae, and bacteria, gentle soft washing to remove dead growth and staining, protection of landscaping and property, and post-cleaning inspection. We also clean gutters of debris and granules, treat problem areas with extended-release solutions, and provide recommendations for preventing future growth. 

  • What causes green moss and algae growth on roofs?

    Moss and algae growth results from Wisconsin's humid climate, moisture retention in shaded roof areas, and organic debris like leaves that provide nutrients for growth. North-facing roof sections receive less direct sunlight, creating ideal conditions for these organisms to thrive. Tree coverage, poor air circulation, and areas where gutters overflow contribute to moisture problems.