Got Questions About Exterior Services?

No. Mt Diablo Window Cleaning is strictly focused on exterior services. This allows our team to specialize in the technical challenges and equipment needed for outdoor cleaning and maintenance. By staying “exterior-only,” we ensure precision and consistency across every service we offer—from solar panel cleaning to bird proofing and gutter repair. This clarity also avoids the confusion common with general janitorial companies. If it's outside, we handle it. If it's inside, it's outside our scope. That’s how we maintain quality and deliver dependable results with every appointment.

Yes. We use humane, non-invasive bird deterrents that are safe for animals, roofs, and solar systems. Our primary method involves galvanized mesh with black PVC coating and non-penetrating clips, which won’t damage your property. We avoid harmful spikes or chemical agents. Secondary options include visual deterrents, optical gels, and eco-friendly sprays with short lifespans. The result is long-term nesting prevention without harm to the ecosystem. We also offer a 5-year material warranty, giving you peace of mind while protecting your solar investment from corrosive debris and wiring damage caused by roosting birds.

No. Our method protects your warranty. We use deionized (DI) water paired with soft-bristle brushes to gently remove debris and mineral buildup without scratching the surface or damaging wiring. This process aligns with manufacturer recommendations and avoids the common mistakes seen with pressure washers or unfiltered tap water. Routine maintenance not only protects your panels but restores up to 25% of lost energy output caused by dirt and bird droppings. If you're investing in solar energy, professional cleaning isn't a luxury—it's necessary system preservation.

Yes. All cleaning solutions used by Mt Diablo Window Cleaning are biodegradable and safe for people, pets, and local vegetation. Our eco-conscious approach supports the health of your landscaping and the broader East Bay environment, especially near sensitive areas like Shell Ridge or the Napa Valley vineyards. We also use purified water systems whenever possible to reduce chemical dependency. The result is a clean you can trust—without compromising your property’s safety or the surrounding ecosystem.

Absolutely. Every technician at Mt Diablo Window Cleaning is fully insured, and those performing aerial work are certified for platform and boom-lift access. We carry active Workers' Compensation and liability insurance, which is essential for high-access services like high-rise window cleaning or multi-story gutter work. Commercial clients especially value this compliance, as it reduces liability and aligns with corporate risk policies. Residential homeowners benefit too—knowing the crew on-site is qualified, covered, and equipped to do the job right and safely.