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    JNSA Roofing

    4.5 (26 reviews)
    Open • 8:00 am - 4:30 pm

    Services - JNSA Roofing

    Deck construction

    Deck repair

    Deck replacement

    JNSA Roofing Photos

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    I had a really great experience with JNSA Roofing. Finding a roofing company you can trust isn't always easy, so I was very happy with how everything turned out. From the first conversation, they were friendly, professional, and easy to communicate with. They explained the work clearly, answered all of my questions, and gave me a price that I felt was very fair compared with other companies I looked into. The quality of the work was excellent. The crew worked efficiently, paid attention to the details, and did a great job cleaning everything up when they were finished. I also really appreciated how respectful and courteous everyone was throughout the process. It's not often you find a contractor who combines good workmanship, reasonable pricing, and genuinely great customer service. JNSA Roofing definitely made the experience much easier than I expected. I'm very happy with the finished work and would absolutely recommend JNSA Roofing to anyone who needs a reliable roofer. I would definitely call them again if I ever need roofing work in the future.

    bubbles and no sealant at the roof edges; easy for water to seep under
    Bob T.

    We had an abysmal experience with Nathan and his son(s) from JNSA. We contracted them for simple repairs to a flat roof that had undergone soffit extensions and fascia replacements. After 4 major leaks which caused extensive damage to our wood floors in the kitchen, dining and living rooms, we contracted a new roofer. They showed us multiple problems with Nathan's work: 1) roof sheeting had not been torched down. 2) sheeting was left unattached to the subroof structure and lifted away with almost no force. 3) seams were crooked and uneven. Some had large gaps where water could seep under 4) subroof was not leveled properly leaving areas that would eventually break apart. A $12K job that cost us $20K to do over. Existing works had to be completely removed and replaced. Ruined $8K in custom aluminum fascia that we had to purchase and wait 4 weeks to be replaced, before the new contractors could start again. Over $4K needed to sand, stain and refinish our hardwood floors. We were told they used a roofing technique that was the bare minimum and would never meet basic code regulations.

    Our new roof!
    Grace T.

    Ves and Nathan were excellent to work with. They gave us a very reasonable estimate and came highly recommended by a friend. They were punctual and very professional. The whole team was efficient. They were quick to answer our questions. They finished just as scheduled. We are satisfied with their service and couldn't be happier with our new roof!

    Perimeter is not water tight. Flashing does not extend to cover roof edge & substrates are exposed and will be ruined by moisture

    I bought a house that recently had work done by this roofing contractor and it was not done correctly. As you can see in the photos, the perimeter edges are completely exposed with large gaps that will allow moisture and water intrusion into the roofing system and probably ruin the foam and plywood sheathing layers, jeapordizing the waterproofing integrity of the assembly. I tried reaching out to the contractor to ask them to repair the work under their workmanship warranty, but they have been ghosting me and failed to respond. After multiple texts, phone calls and emails, I have up. If I could give 0 stars I would. DONT EVER use this roofing contractor.

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    4 years ago

    Their team is nice and courteous and got my roof repaired quickly!! They are very reliable and easy to work with!

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    Review Highlights - JNSA Roofing

    “We contacted them for a quote and Nathan came to give an inspection himself before sending a detailed proposal.”

    Mentioned in 11 reviews

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    Professional Drainage Experts - Garden Grove, CA- The team at Professional Drainage Experts

    Professional Drainage Experts

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    We had Professional Drainage Experts design and install a drainage system to protect our home from…read morewater intrusion, and the entire experience was outstanding. From the beginning, Foster was responsive, professional, and incredibly patient. He took the time to thoroughly evaluate our property, answered every question we had, and provided a detailed plan that gave us complete confidence in moving forward. Once the project began, Julio and his crew were exceptional. Julio was on site every day, kept us informed throughout the process, and his attention to detail was second to none. Early in the project, he even identified a previously unknown leak on our property that could have easily gone unnoticed and made sure it was addressed. What stood out most was the level of care the entire team put into their work. They weren't just completing a project. They were making sure it was done correctly and built to protect our home for years to come. Thank you to Shanese, Foster, Julio, and the entire team at Professional Drainage Experts. We couldn't be happier with the results and would recommend them without hesitation.

    Just not good. Took 2 weeks of broken promises to get an appointment. Which they eventually gave…read moreme a date and time and I accepted, only to be followed by another message from them that their phantom scheduling manager would confirm - huh? Which of course that never happened. At which point I'd already taken the day off work and waited for them to arrive at 8AM which never happened. I get they said it was because they were very busy but at least set my expectations of that - don't promise I'll be contacted to arrange a time multiple times, give me a time, not show up and then tell me you're booked for several more weeks. Just really poor communication and I'm glad this happened now rather than if I needed something from them after they did work.

    The Foundation & Drainage Repair - Why Choose Us - Los Angeles, CA

    The Foundation & Drainage Repair

    (89 reviews)

    Sherman Oaks

    Having just hired Eldar and his team on a 3-week project, I absolutely recommend The Foundation &…read moreDrainage Repair without reservation. This was the best experience I've ever had working with a contractor, and I've worked with some really excellent ones both in LA and the Bay Area, as well as some true scumbags who amounted to fraudsters (hence my anxiety surrounding this project and my meticulous due diligence). Eldar is honest, experienced, and so very kind. He knows what he's talking about, he explains the issues thoroughly, his solutions are logical, and his prices are reasonable. Women, especially, take note: he won't talk down to you, and he won't bullsh*t you or waste your time. He stays positive and friendly, even when new challenges like huge, invasive roots up against and under the foundation reveal themselves as the project progresses. He communicates clearly, sets realistic expectations, and provides comprehensive progress updates at the beginning and end of each day, and sometimes more if urgent matters come up. He listens to clients' needs and expectations, and is very good at working with anxious customers. His team is professional, punctual, super friendly, and incredibly hardworking. They went above and beyond every single day, kept the worksite clean and tidy, and ultimately left my yard much cleaner than it was when they started. So, to sum up my experience: These guys are fantastic. Don't wait. Don't hesitate. You'll be in great hands. Now, if you want all the dirty details of my cracked slab and water intrusion saga: I had several different foundation/structural companies come out (yes, even the usual suspects in sponsored search results) and look at my foundation over the past few years, and I got vastly different suggestions on what I should do to solve my problem, with a range of very high prices. I was overwhelmed because none of the solutions seemed right to me, and I was worried some would actually end up causing other problems down the road because they went overboard on foundation support, but didn't address drainage. After my first meeting with Eldar, it was clear to me his solution would be the most effective for my problem, which was 99% caused by a lack of drainage around my property. The rest of the problem was caused by a very shallow free-pour foundation on one side of the house (1950s construction), which Eldar and his team uncovered during the excavation process, and supported by making some very solid, high-quality footing extensions, which they waterproofed. Expansive clay soil and a slope behind my house also factored in. I had so much anxiety about hiring a contractor who would take the wrong approach along with all my money that I basically sat on this problem for four years. Bad idea, I know. I'll spare you the details of my insanity every time it rained, but let's just say lots of stress, dozens of shop towels and multiple Quick Dam flood barriers were involved. I was seriously losing my mind with every new crack in my slab and walls. Now that Eldar and his team are done installing deep french drains, waterproofing, footing extensions and a sump pump, I feel such a sense of relief. I'm confident that I'm going to survive this year's anticipated El Niño storms while maintaining my sanity, and I feel so lucky I found The Foundation & Drainage Repair when I did. I'll update and post videos of my beautiful new sump pump in action when the rains come.

    Thank you Eldar! We couldn't have asked for a better experience. We had a lot of questions and…read moreconcerns about installing a drainage system and sump pump. All of our questions were answered and concerns were quickly put at ease. Eldar and his team worked quickly and efficiently. The drainage system works great. Highly recommended.

    California Decking & Waterproofing

    California Decking & Waterproofing

    (70 reviews)

    Sun Valley

    As a real estate developer and general contractor, I've worked with countless contractors and…read morevendors across Southern California. I've seen the full spectrum--the good, the bad, and everything in between--and there isn't a component of a home I haven't rebuilt or replaced multiple times across various projects. I don't give recommendations lightly. California Decking and Waterproofing was excellent to work with from start to finish. Their team was punctual, reliable, and professional, and the quality of their work speaks for itself. The deck they rebuilt is significantly better than the original construction, and the warranty provides real peace of mind. We interviewed four different companies before making a decision, and I'm confident we chose the right one. I would not hesitate to recommend California Decking and Waterproofing.

    Victor was there from start to finish, and I had a great experience working with this company. They…read morewaterproofed six balconies for me and kept me updated with photos throughout the entire process, which I really appreciated. What stood out most was their professionalism and honesty--they never tried to upcharge or renegotiate the price at any point. I also had tenants on the property during the work and received zero complaints, which says a lot about how respectfully and professionally they operated. Technically, it hasn't rained yet, so I can't fully speak to the long-term performance--but from what I've seen so far, the work looks solid and well done. On top of that, they offer a strong warranty, which gives extra peace of mind. If you need waterproofing done, don't overthink it--just go with Victor.

    JNSA Roofing - roofing - Updated October 2026

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