Business Details
Seattle's Trusted Window & Building Cleaning Services
MNZ Window Cleaning Services was founded with a commitment to delivering exceptional cleaning solutions for both residential and commercial properties. Our team specializes in window cleaning, gutter maintenance, roof treatments, and pressure washing, utilizing advanced techniques and equipment to ensure precision and safety. We prioritize customer satisfaction through a 100% guarantee, ensuring every job meets the highest standards of quality. With a focus on safety and compliance, we adhere to Washington State Department of Labor & Industries standards and OSHA guidelines. Our expertise extends to challenging projects, including high-rise buildings and post-construction cleanups, while maintaining a personalized approach for every client.We serve the Seattle Metro Area and surrounding communities, offering tailored services to meet diverse property needs. Our dedication to continuous improvement has led to the development of innovative solutions like Inspection Imaging, enhancing our ability to protect and preserve client investments. Through years of experience and a commitment to excellence, we have built a reputation as a trusted partner for property maintenance in the Pacific Northwest.
Services
Window Cleaning
Gutter Cleaning
Pressure Washing
Roof Treatment
Moss Removal
Commercial Cleaning
Rope Access
Skylight Cleaning
Leaf Clearing
Heated Pressure Washing
Highlights and features
- We offer a 100% satisfaction guarantee on all services
- Fully licensed, bonded, and insured for your protection
- Experienced team with specialized equipment for challenging jobs
- Safety-focused approach following OSHA and state guidelines
- Tailored solutions for both residential and commercial properties
What people say
Timely, professional
Quality job
Great price
Ensured happiness
No rework needed
Services
Window Cleaning
Professional window cleaning for residential and commercial properties using advanced carbon-fiber pole systems and traditional squeegee methods. Our technicians handle single-story homes to high-rise buildings with safety-focused techniques. Services include interior/exterior cleaning, skylight maintenance, and post-construction window detailing.
Gutter Cleaning
Comprehensive gutter inspection and cleaning services to prevent water damage. Our team removes debris, checks for proper drainage, and provides photographic documentation when needed. Regular maintenance prevents foundation damage and extends roof lifespan while ensuring proper water runoff.
Pressure Washing
High-pressure cleaning for concrete, stone, and exterior surfaces using heated systems for grease/oil removal. Services include driveway restoration, pathway cleaning, and commercial property maintenance. Our equipment handles large areas efficiently while protecting surrounding landscaping.
Moss Removal
Specialized moss removal and prevention treatments for residential roofs. Our process includes safe moss elimination, shingle protection, and photographic documentation for insurance purposes. Regular treatments extend roof lifespan and maintain property value in the Pacific Northwest's wet climate.
Commercial Cleaning
Tailored exterior maintenance for commercial properties including storefront cleaning, mid-rise/high-rise window washing, and industrial facility maintenance. We use lifts and rope-access systems for challenging locations while maintaining strict safety protocols and minimizing business disruption.
People
Mark Stertz
Owner | Lead Tech
Founder with extensive experience in rope access techniques and commercial window cleaning. Built a team focused on quality service and safety standards while maintaining hands-on involvement in complex projects.
Jaime
Support Tech | Admin/Sales
Joined in 2018, manages administrative operations and client communications. Brings consistent reliability to customer service while balancing technical field responsibilities despite occasional challenges with Pacific Northwest weather.
Isiah
Support Tech
Started in 2019 while pursuing education, demonstrating rapid skill development. Shows steady improvement in technical execution and client interaction while maintaining strong work ethic.
Luis
Field Tech
Joined in 2020 with immediate impact through strong work ethic. Focuses on precise execution of cleaning protocols while maintaining attention to safety requirements and client expectations.
Questions
What areas do you service?
We operate throughout the Seattle Metro Area and surrounding cities including Burien, Bellevue, and Tacoma within the Puget Sound region.
Do you offer commercial building services?
Yes, we provide window cleaning, pressure washing, and maintenance for storefronts, office buildings, shopping centers, and industrial properties.
Are you licensed and insured?
We maintain full licensing, bonding, and insurance coverage while following Washington State and OSHA safety standards for all operations.
How often should windows be cleaned?
Most residential properties require cleaning every 6-12 months depending on location, with urban areas needing more frequent maintenance due to environmental factors.
What safety measures do you follow?
Our team uses harnesses, safety lines, and specialized equipment while adhering to strict protocols for all heights and challenging access situations.
Do you handle roof moss removal?
Yes, we provide comprehensive moss removal and prevention treatments with photographic documentation available for insurance purposes.
