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 soft wash treatment removes biological growth at the source without the high pressure that damages roofing materials.
We clean tile, shingle, and flat roofs across Pasadena, South Pasadena, and the San Gabriel Valley. Licensed, insured with $1M in liability coverage, and fully Rex-guaranteed.
Different roofing materials need different care. We match our approach to your roof's specific material and condition so you get a thorough clean without any risk of damage.
Tile roofs are a signature look in the Pasadena area. Our soft wash 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.
Flat and low-slope roofs collect standing water and debris that accelerate growth. We clean these surfaces carefully and clear drainage paths so water flows off properly instead of pooling.
A roof replacement in Pasadena can cost $15,000 to $30,000 or more depending on the material. Regular cleaning removes the biological growth that causes premature deterioration, adding years to your roof's useful life. It's one of the best returns on any home maintenance investment.
Removing moss, algae, and lichen prevents them from degrading roofing materials over time. Regular cleaning can extend your roof's lifespan by 5 to 10 years compared to leaving growth unchecked.
A $799-$1199 cleaning every few years is far cheaper than a premature $15,000+ roof replacement. Keeping your roof clean is the most cost-effective maintenance you can do.
Dark algae stains absorb more heat from the sun, making your home harder to cool in Southern California summers. A clean roof reflects heat more effectively and can reduce cooling costs.
Our soft wash process is designed to be effective against biological growth while being gentle on your roofing materials.
Call (626) 545-3132 to get started. Tell us about your roof, its size, type, and any moss, algae, or buildup you've noticed. Our friendly Rex Crew will send you a clear, no-pressure quote faster than a dino dash!
Happy with your quote? Great! Choose a date that fits your schedule using our simple booking calendar. We'll lock it in and get everything ready for your Rex-level clean.
Sit back and relax while the Rex Crew removes moss, algae, and grime from your roof. We restore your roof's clean look, help protect its lifespan, and boost your home's curb appeal, no climbing required!
See the difference clean makes on homes like yours
Hundreds of homeowners across Pasadena and the San Gabriel Valley trust Rex's crew with their windows, gutters, and everything in between. Here's what they say after the work is done.
Paz did an amazing job at cleaning our windows. They were friendly, fast and very efficient!
Andy and Atile were amazing! They are so friendly, professional, communicative and thorough. Very reasonable pricing. The windows look incredible! Check out the before and after photos. Highly, highly recommend Paz!
Thank you Andy for taking care of our 100+ year old windows and giving us a beautiful view to the outdoors! You are a delight to work with and we will call on you again!
Paz was cleaning my neighbor's solar panels and windows and were doing a great job. They were kind enough to fit me in on the same day and washed my windows inside and out. Everything is sparkly for the holidays!
We hired Paz Window Cleaning to clean our windows, outside and in, and screens. We learned that they offer other services as well, such as power washing. They did an excellent job and were a pleasure to work with. Professional and personable. We can see clearly now! Support a local business.
Great job! Great price! Great people! The windows are stunning. Andy is genuine and sweet and makes it easy. Locking him in for all windows, gutters and power washing.
I found Andy Paz Window Cleaning via Google search. The reviews looked good and I had to go with Andy as we have the same name. Andy went above and beyond to clean my dirty windows for the first time in 40 years.
Andy and Atile were both very professional and friendly while they did their work. We appreciated the care they took to not only do a good job, but to make sure we were satisfied. Thumbs up!
Paz Window Cleaning did an amazing job with a house wash on our 100 year old home! They made sure it would be gentle enough for the paint and original wood and the windows have never looked better.
My windows and patio doors are sparkling clean, thanks to Andy and Ashley's excellent work. It was a pleasure to have them here, and I will definitely call on them again.
This couple was very professional, and kind. From the first meeting for the estimate through the moment they finished, it was easy and pleasant. They didn't just do an amazing job on the windows and gutters, they were amazing with my large Great Danes too.
Andy was of great assistant. The business responded promptly and the job was completed effectively. Clear photos were offered and communication was easy! Definitely recommend!
I've had window cleaning services from several companies, but I'm so happy with PAZ's nearly flawless cleanliness. If you hire this company, you won't regret it. I'm confident you'll get the best window cleaning service.
Andy did great work on both our solar panel and gutters. Meticulous and friendly. It's good to have a very trustworthy business helping maintain my home, and I will be using his services every six months.
Andy and his wife are awesome at their job. They are not only nice, they are proactive, good at communicating, really focus and took time to make sure they get the cleaning done right. I had a house wash, pressure cleaned my patios and front, and window cleaning with them. All went very well.
Yes. Soft washing uses low water pressure (typically under 500 PSI) that won't crack, chip, or dislodge tiles. It's actually the cleaning method recommended by most tile roofing manufacturers. We never use high-pressure washing on any roof because the risk of damage is too high, especially on tile and shingle.
Those dark streaks are typically caused by Gloeocapsa magma, a type of blue-green algae that feeds on the limestone filler in asphalt shingles and some tile roofs. It spreads across your roof over time and darkens as it collects dust and dirt. Without treatment, it continues to spread and can eventually damage the roofing material underneath.
Every 2 to 3 years is typical for most homes in the Pasadena area. Roofs with heavy tree coverage, north-facing slopes, or proximity to hills (common in Altadena and La Canada Flintridge) tend to develop growth faster and may need more frequent cleaning. We can assess your roof and recommend the right schedule.
Soft wash cleaning does not void warranties. In fact, many roofing manufacturers recommend regular professional cleaning to maintain warranty coverage. What can void a warranty is high-pressure washing, which is why we exclusively use the soft wash method on all roofs. We're happy to check your warranty requirements before we start.
Roof cleaning in Pasadena starts at $799, with final pricing based on the size, pitch, and material of your roof. Steeper roofs, larger surface areas, and heavy biological buildup (moss, algae, dark streaks) require more time, treatment, and safety equipment. Rexterior uses soft-wash treatment that's safe for tile, shingle, and flat roofs — no high-pressure damage, no voided manufacturer warranties, and every job includes a written roof condition report at no charge. We provide free quotes based on your specific roof so you know the exact cost upfront.
Moss, algae, and dark streaks don't just look bad, they shorten your roof's life. Schedule a professional soft wash cleaning and protect one of your home's most important investments. Rex handles it from inspection to cleanup.
