Those dark streaks and green patches on your roof aren't just ugly, they're slowly eating into your roofing material. Moss, algae, and lichen trap moisture against shingles and tiles, accelerating deterioration and shortening your roof's lifespan. Rex's gentle low-pressure treatment removes biological growth at the source without the high pressure that damages roofing materials.
We clean tile and shingle roofs across Pasadena, South Pasadena, and the San Gabriel Valley. Currently available for one-story roofs. Licensed, insured with $1M in liability coverage, and fully Rex-guaranteed.
★★★★★ 5.0 on Google
Licensed & $1M Insured
Family-Owned Since 2016
See the difference clean makes on homes like yours
Different roofing materials need different care. We match our approach to your roof's specific material and condition to help reduce the risk of damage while getting a thorough clean.
Tile roofs are a signature look in the Pasadena area. Our low-pressure method cleans between and underneath tiles without cracking, chipping, or dislodging them, preserving both the look and integrity of your roof.
Algae and moss growth on shingle roofs is more than cosmetic. These organisms lift shingle edges and trap moisture underneath. Our treatment kills the growth and helps prevent it from returning quickly.
Our cleaning solution penetrates biological growth at the root level, killing moss, algae, and lichen rather than just rinsing them off the surface. Results last longer between cleanings.
While we're on your roof, we take a quick visual check of your gutters and downspouts and flag anything we notice, like clogs or loose sections. It's a helpful extra look, not a substitute for a full gutter cleaning.
Simple, Honest Pricing
No hourly guessing games and no surprise add-ons. You approve a firm quote, pay the deposit, and that's the number on your invoice.
✓ Firm price confirmed before we start
✓ Small deposit locks in your appointment
✓ Licensed, insured, and locally owned
Final pricing depends on the roof's size, pitch, access, material, staining, condition, and scope. Rexterior currently provides roof washing for one-story roofs only. Every project receives a personalized quote before work begins.
Hundreds of homeowners across Pasadena and the San Gabriel Valley trust Rex's crew with their exterior cleaning needs. Here's what they say after the work is done.
Roof washing starts at $697 for qualifying one-story roofs. Final pricing depends on your roof's size, pitch, access, material, staining, and condition, and larger, steeper, or more complex roofs may require a custom quote. Your exact price is confirmed before any work begins.
We select our approach based on your roof's specific material and condition to help reduce the risk of damage. Results and safety depend on the roof's age, material, and existing condition, so we're glad to answer specific questions about your roof during your quote.
Yes, our treatment targets algae, moss, and lichen growth. Results vary depending on the buildup, roof material, age, and how established the growth is, so heavily affected areas may improve significantly rather than clear completely in a single visit.
We aim to minimize walking on the roof and adjust our approach based on your roof's material and condition. If you have specific concerns about access on your roof, let us know and we'll address them during your quote.
Right now, Rexterior offers roof washing for one-story roofs only. If your home has a two-story or multi-level roof, give us a call and we'll let you know what options are available.
Most Pasadena roofs benefit from cleaning every 1 to 3 years, depending on shade, tree coverage, and how quickly algae or moss returns. We can help you decide the right frequency based on what we see during your service.
Most one-story roofs take a few hours to complete, depending on size, pitch, and the amount of buildup. We'll give you a time estimate along with your quote.
Removing algae, moss, and organic buildup can help reduce the kind of ongoing wear that shortens a roof's useful life, but results depend on your roof's age, material, and condition. We can't guarantee a specific number of added years, since regular cleaning is just one factor in a roof's overall lifespan.
Tell us a bit about your home and we'll send back a free, no-obligation estimate — usually within one business day.