Diamond Roofing
Company Overview
Residential and Commercial Roofing. Shingle, Tile, Cool Flat Roofs, Metal Roofing, and Hot Tar Solutions. Gutter Setup, Round-the-Clock Emergency Services, Leak Fixes, Water Testing, Routine Maintenance, New Builds, Re-Roofing, Skylight Installation, AND MORE!
Fred Marion, Owner of Diamond Roofing San Diego has been in the roofing industry for over 40 years. Diamond Roofing is committed to honesty and prioritizing our customers. Our philosophy is that our customers begin with our staff; at Diamond Roofing, we treat our employees with respect, and in return, our customers are treated like treasures.
Fred Marion, Owner of Diamond Roofing San Diego has been in the roofing industry for over 40 years. Being a fourth-generation roofer, he is proud of his roofing heritage.
Business Services
- Gutter addition
- Gutter cleaning
- Gutter installation
- Gutter repair
- Gutter replacement
- Moisture control installation
- Moisture control repair
- Roof cleaning
- Roof inspection
- New roof installation
- Roof repair
- Roof replacement
- Reroofing
- Skylight installation
- Skylight repair
Business Location & Hours
Mon: | 7:00 AM - 4:00 PM |
Tue: | 7:00 AM - 4:00 PM |
Wed: | 7:00 AM - 4:00 PM |
Thu: | 7:00 AM - 4:00 PM |
Fri: | 7:00 AM - 4:00 PM |
Sat: | Closed |
Sun: | Closed |
Recommended Customer Reviews

We had a sudden leak. We live in a planned community and when I asked for a recommendation via our FB group, Diamond came to the top. The huge storm of Jan' 24 was over but more rain was on the way. Joe Sarmiento, their sales rep was more than helpful! It was still raining nearly daily. We were worried and I guess he heard that because he said they'd try to work between the rain and get our repair scheduled. On time, on budget, friendly and they even stuck around during the 45 minutes of downpour to finish our work. Rain continues but no leaks!! Thank you Diamond Roofing!!

Carlos came out at the scheduled time, January 5, and did an inspection of our roof, which had a leak. He showed me photos and explained everything in detail. He left saying I would receive a proposal and quote soon. I contacted him again on January 16 to follow up and ask for the proposal. Carlos said he had been ill and would work on the proposal that very day. I called their office on January 19. They said that yes they had all the information and would get a proposal to me by the end of the day. It's now January 23. Crickets. This was a complete waste of my time and I no longer trust them to do what they promise.

I had Diamond Roofing do the roof on my house, and they did a relatively good job, and the roof doesn't leak. There were a few issues such as they took the tv satellite off the roof and just threw it away. They also didn't do gutters on both sides, as it was before the re-roofing. I contacted them later about doing the roof at my business, which is very, very, very urgent, as the roof leaks like a sieve and has caused major damage to the interior when it rains. They didn't show up to the first appointment, which they scheduled on Labor Day. They rescheduled, and then the estimator asked if he could come the next day as he had a family thing to take care of, so I happily agreed. A MONTH has gone by and I still don't have a quote!!!!!!!!!!! I've called several times, and was told by the estimator that he was busy, but he promised to get me a quote a week after I talked to him, two weeks ago. This company has jumped the shark hard. Don't waste your time.
UPDATE: I called and asked to speak to the owner. I would imagine he would want to know how his employees are doing, or not doing their job, as I would if I were him. I was given a wrong number to call. I called back and was given a different number which was also wrong.

Excellent crew. This is the third time we've used this company, and we couldn't be happier with their work. With all this rain this year, and our aging house, I'm glad we have this company around to help.
Joe came out to look at our roof leak. He accessed and gave me a quote using his service department (two man team, paid hourly). He figured it would save me money (versus a flat charge) since the work wasn't too big.
Technicians came out the following week. Edmundo explained his work and did his magic so future water would divert more towards the gutters than the side of our house. Techs were both super nice and hard working. They finished the repair in a few hours.
I received the invoice a few weeks later, and notice a small discrepancy. Joe verified the work with his technicians and fix the invoice. Excellent customer service!
Communication, work and customer service is great. Love working with companies like this. Eventually we'll need to re-paper our whole roof. We'll definitely use Diamond Roofing again.

Diamond Roofing repaired a roof leak we had a few years ago, so I called them again when we got a new leak. This is how that whole process went:
I called their number. Someone picked up right away, but then told me they only take appointments via email.
I hung up and wrote an email.
12 hours later, I got a reply offering two options: 1) provide a proposal for permanent repairs, or 2) do a temporary repair, and then follow up with a proposal for permanent repairs.
I replied that I wanted to make an appointment for a permanent repair.
Two days later, I got a reply that they can't do permanent repairs without knowing what the main issue is first, and to let them know which option I wanted. I thought I'd made it clear I wanted the first option, but okay then.
I replied and clarified I wanted the first option.
Two more days later, I got a reply that they could have someone out next week, in six days' time.
I replied to confirm and asked if they had an estimate for what time the person would be here.
I never got a reply. Today was the day they were supposed to be out. No one showed up, and I never heard anything again from them.
If you're looking for good customer service, I definitely encourage you to look elsewhere. If you're looking for good work ... well, I couldn't even tell you, since I couldn't get past their subpar customer service.

I selected Diamond Roofing to replace my cedar shake roof with a fire retardant urethane shake on my 95 year old Tudor home. Very difficult project. Tear off, install plywood sheeting, paper and shingles. They also replaced my very old copper gutters.
From scaffolding to completion of the punch list, they were reliable, efficient and skilled. I highly recommend Diamond Roofing for any roofing project.

Diamond Roofing was fantastic from start to finish.
Fred, the owner was the most experienced, informative and flexible of the six who bid our 2,400SF re-roof. Their estimate was just below the average. Only Diamond did research and came up with a solution that saved $3,700 in roof insulation replacement costs. Rochelle and the office staff were easy to work with and accommodating. The company honored their original bid after we had to delay, despite cost increases during the pandemic. Their superintendent, Carlos, was just awesome - very knowledgable and responsive. The foreman on the job clearly explained all wood damage and tried to keep repair costs down. They were nice enough to install a skylight at no cost! The sub they used for beam replacement was professional. At times, clean-up outside and minimization of debris during ceiling exposure could've been more thorough. A friend who owns many properties was quite complimentary of Diamond's work and materials choices, and he is not easily impressed. I highly recommend Diamond Roofing.

Our second amazing roof replacement by Diamond Roofing. All work was on time, professional, perfect workmanship. Courtney and Rachelle answered and resolved any questions immediately. Scheduling was efficient and crews were always on time and cleaned up well each day.
Thank you again, Fred Marion, for a fair and reasonable estimate and for sticking to it. By the way, they replaced 16 skylights as well as the roof of our condo bldg. Awesome company. You won't regret using Diamond Roofing!!!

Outstanding service with a very good value. Got roof repair handled with timely response and a very clean and thorough job.

Have a small roof leak that leaks sometimes when it rains. Had them come out to fix it but they said the entire roof needed to be replaced. I didn't hear back from them to get an estimate for an entire week. Then they called to get my email. In the meantime I had called another company who came out and provided an estimate to fix leak and set up day to have repair done.