--- title: "Cupertino Roof Washing | AG Windows and Gutters" description: "Professional soft-wash roof cleaning in Cupertino, CA. Safely kills black streak algae, moss, and lichen on asphalt, tile, metal, and shake roofs." lang: en json-ld: | [ { "@context": "https://schema.org", "@type": "Service", "name": "Cupertino Roof Washing", "provider": { "@type": "LocalBusiness", "name": "AG Windows and Gutters", "telephone": "(408) 921-3982", "address": { "@type": "PostalAddress", "addressLocality": "San Jose", "addressRegion": "CA", "addressCountry": "US" } }, "areaServed": { "@type": "City", "name": "Cupertino" }, "description": "Professional soft-wash roof cleaning in Cupertino, CA. Safely kills black streak algae, moss, and lichen on asphalt, tile, metal, and shake roofs." }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "How much does roof washing cost in Cupertino?", "acceptedAnswer": { "@type": "Answer", "text": "Most single-story homes run $400–$700, two-story homes $600–$1,200 depending on roof size and complexity. New customers get 5 windows cleaned free (interior and exterior) with any first-time service. Chat with us for a free quote." } }, { "@type": "Question", "name": "Will roof washing damage my shingles?", "acceptedAnswer": { "@type": "Answer", "text": "No. Soft washing is the method recommended by ARMA (the asphalt shingle industry trade group). We never pressure-wash shingles or tile." } }, { "@type": "Question", "name": "How long until my roof looks clean?", "acceptedAnswer": { "@type": "Answer", "text": "Most roofs look dramatically better immediately. Remaining algae continues to die off and rinse away with the next few rains, brightening over 2–6 weeks." } }, { "@type": "Question", "name": "How often should I wash my roof?", "acceptedAnswer": { "@type": "Answer", "text": "Every 2–4 years for most Cupertino homes. Heavily shaded roofs or homes near trees may need more frequent treatment." } }, { "@type": "Question", "name": "Can you also clean my gutters during the same visit?", "acceptedAnswer": { "@type": "Answer", "text": "Yes, most customers bundle roof washing with gutter cleaning. We can package both into one quote." } } ] } ] --- Menu 🔥 5 Windows Free Expires tonight at midnight 13h : 28m : 06s [(408) 921-3982 ](tel:4089213982) [Home](/)/ [Cupertino](/cupertino-window-cleaning)/ Roof Washing Residential Service · Cupertino, CA # Cupertino Roof Washing Soft-wash roof cleaning, kill algae and moss, restore curb appeal, protect your shingles. Soft-wash, manufacturer-approved for asphalt shingles Kills black streak algae, moss, and lichen Safe for tile, metal, and shake roofs Protects landscaping with full pre-rinse "AG did an outstanding job on our roof washing in Cupertino. Professional, on-time, and the results speak for themselves." Verified Google Review AG Windows and Gutters provides professional roof washing for Cupertino and the Cupertino homes. Using soft-wash techniques approved by major shingle manufacturers, we safely kill black streaks (gloeocapsa magma algae), moss, and lichen without high-pressure damage to your shingles or tiles. ![Roof washing service on a residential home](/assets/photo-roof-clean-BFgAmFl_.jpg) ![Roof cleaning detail showing black streak removal](/assets/service-roof-cleaning-Bu14ArTR.jpg) ## Why Roofs Need Soft Washing Those black streaks running down asphalt shingles aren't dirt, they're a living algae called gloeocapsa magma that feeds on the limestone in modern shingles. Left untreated, it shortens roof life, raises cooling costs, and tanks curb appeal. Pressure washing strips the granules off your shingles and voids warranties. Soft washing kills the organism at the root and rinses it away gently. Our crew applies a biodegradable cleaning solution, lets it dwell to kill algae and moss, then rinses gently. Landscaping is pre-rinsed and protected throughout. Most roofs look dramatically better immediately and continue to brighten as remaining algae dies off in the following weeks. ## What's Included - Soft-wash treatment of full roof surface - Targeted moss and lichen removal - Killing of gloeocapsa magma algae at the root - Gentle rinse, no shingle granule loss - Landscaping pre-rinse and protection - Gutter rinse to clear any debris from cleaning ## Our Process 1 ### Free Quote in Minutes Start a chat, share a few details about your home, and we send a personalized quote, usually within 15 minutes. 2 ### Easy Scheduling Pick a date that works for you. Most Cupertino addresses can be scheduled within 3–7 days. 3 ### We Show Up On Time Uniformed crew arrives in a marked truck, ready to work. We protect your floors and landscaping from start to finish. 4 ### Guaranteed Results Every job is inspected before we leave. If you spot an issue after we leave, we come back free. ### Fully Insured · Background-Checked Crews Every AG technician is uniformed, drug-tested, and trained on our process. ## Cupertino Roof Washing FAQs The questions Cupertino homeowners ask us most about roof washing. ### How much does roof washing cost in Cupertino? ### Will roof washing damage my shingles? ### How long until my roof looks clean? ### How often should I wash my roof? ### Can you also clean my gutters during the same visit? ### Ready for Cupertino Roof Washing? Get a free quote in minutes, or call us directly. [(408) 921-3982](tel:4089213982)Get a Quote ![Emily](/assets/emily-avatar-0y6DPpiW.jpg) ### Emily, AG Windows and Gutters Online now, ready to help ![Emily](/assets/emily-avatar-0y6DPpiW.jpg) Hey! 👋 I'm Emily with AG Windows and Gutters. Thanks for reaching out, I'd love to get you a free quote. First, **which service can I help you with today?** 🪟 Window Cleaning🍂 Gutter Cleaning☀️ Solar Panel Cleaning🏡 House Washing ## Other Services in Cupertino [Solar Panel Cleaning ](/cupertino-solar-panel-cleaning)[Gutter Cleaning ](/cupertino-gutter-cleaning)[House Washing ](/cupertino-house-washing) ## Roof Washing in Other South Bay Cities [San Jose ](/san-jose-roof-washing)[Atherton ](/atherton-roof-washing)[Morgan Hill ](/morgan-hill-roof-washing)[Los Gatos ](/los-gatos-roof-washing)[Sunnyvale ](/sunnyvale-roof-washing)[Redwood City ](/redwood-city-roof-washing)[San Mateo ](/san-mateo-roof-washing)[Saratoga ](/saratoga-roof-washing)[Palo Alto ](/palo-alto-roof-washing)[Santa Clara ](/santa-clara-roof-washing)[Fremont ](/fremont-roof-washing)[Campbell ](/campbell-roof-washing)[Los Altos ](/los-altos-roof-washing)[Milpitas ](/milpitas-roof-washing) ## Claim Your 5 Windows Free Special Today \*Limit 5 windows per customer Expires tonight at midnight New customers get 5 windows cleaned free (interior + exterior) with any first-time service. Tell us about your home and we'll send you a personalized quote in minutes. [(408) 921-3982](tel:4089213982)Get a Quote ![AG Windows and Gutters San Jose](/assets/logo-ag-DBAx7BU0.png) ![AG Windows and Gutters San Jose](/assets/logo-ag-DBAx7BU0.png) San Jose's trusted residential window cleaning company. Locally owned, fully insured, streak-free guaranteed. #### Contact [(408) 921-3982](tel:4089213982)[agwindowsandgutters@gmail.com](mailto:agwindowsandgutters@gmail.com) Mobile service across San Jose, the South Bay & Peninsula. #### Business Hours Monday 8 AM – 8 PM Tuesday 8 AM – 8 PM Wednesday 8 AM – 8 PM Thursday 8 AM – 8 PM Friday 8 AM – 8 PM Saturday 9 AM – 5 PM Sunday 9 AM – 5 PM #### Find Us [View on Google Maps](https://maps.app.goo.gl/LJxvKfjTmno7tQiR6) © 2026 AG Windows and Gutters San Jose. All rights reserved. [Click to call](tel:4089213982)Click to Chat