Our family needed a roofing company we could trust to replace our parents Castro Valley home's roof. Nothing is standard about this home including a massive one-of-a-kind full custom multi-level roof that included: mounted electrical solar panels, and separate roof mounted pool solar collector panels, 2 chimneys, a flattop roof section with adjustable skylights that need to be replaced. We also needed an outbuilding's flattop roof and skylights replaced. We chose Wonderlin Roofing Systems for the following reasons * Extensive expertise * Long history in the Castro Valley area * Excellent references * Willing to work with clients Grover Wonderlin and his office Manager Marianne worked with us throughout the entire process and were always polite, knowledgeable, answering our questions, provided excellent advice. Before starting the tear-off, they covered the pool with the largest tarp I have ever seen. I was impressed with their clean-up, walking around the home twice checking for nails and anything that might have been missed. The crew inspected the exposed roof structure, repairing water damage, and recommended adding a chimney cricket to reduce the potential for water damage in the future. The crew was on site the day the roofing materials were delivered, to setup and ensure the roof was protected in case of rain. I was impressed with the quality of their work and how quickly they completed the job in just a few days. Each day the crew cleaned up, and on the final day thoroughly checked the entire property for nails or anything that might have been missed. Grover's knowledge and advice for the vendor reinstalling the electrical solar panels was invaluable and greatly appreciated. I enthusiastically recommend Wonderlin Roofing Systems Sincerely, Dave Burton read more

We had two leaks and contacted several roofers and ultimately went with Wonderlin. Grover, the owner, inspected our roof himself and gave an honest assessment. He broke down what needed immediate attention, what could wait, and what wasn't worth redoing until we need a full roof replacement. Their office staff is very responsive to emails. Pricing was more reasonable and they provided a warranty for their repair work. The shingle work was straight and looks good. Chimney reflashing was a bit sloppy with the sealant. Crew was friendly and easy to work with. read more

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Our first experience with Wonderlin Roofing Systems was in February 2025 when we called on them to repair a leak after a heavy rain storm. The crew made an excellent repair and it held up just fine throughout the rest of that rainy season and the next. When the time came to do the roof replacement, we didn't hesitate to call them for a consultation. With Grover Wonderlin's extensive background in roofing systems and excellent reputation for quality roof installations all around the bay area we felt very confident in choosing them to do our work. Grover patiently worked with us to provide an understanding of the available roofing systems, warranties and current industry regulations. The whole process was smooth, from setting the start date through completion of the work. The office staff was great to work with too; always keeping us updated on progress and being available to answer our questions. And a huge shout-out to the roof installation crew, who did an outstanding job!! The results are professional and very impressive. Also want to mention that Grover and crew installed a sun tunnel in our master bath sink area; something I had been wanting to do for many years! I'm loving all the natural daylight streaming into the room now. Many thanks to Wonderlin Roofing for a job well done!! read more

As a retired GC I'm very particular who I contract with to perform work on my house. Grover Wonderlin and his team are without a doubt top notch craftsman. They responded to my request for a proposal for a new tile roof immediately and within a week of starting finished the project. My wife and I are delighted with finished product. Grover was very patient helping us select just the right tile and his son Matt kept the job going quickly despite the rain we experienced during the 7 day installation. I really enjoyed working with this family run business. read more

This an update to a wonderful, five-star rating that I provided to Wonderlin in 2022 after they put on our new roof and added solar provided by their sister company, Synergy Energy in Livermore. As any long time California resident knows, we don't get a lot of rain compared to other areas of the country. Because of climate change, we have started experiencing atmospheric river storms as witnessed in the last few weeks. We experienced a leak during the week between Christmas and New Years and when I called their office, I learned that they were closed until Monday, January 5. Well to my surprise. I received a call back from their office asking about the severity of the leak and whether I needed immediate help or could it wait until they had everyone back to work on the 5th. I had a bucket collecting water and the leak was small enough that I decided it could wait. On the 5th, I received a call back from the office asking if they could send two repair people that afternoon to inspect and repair the issue. I was not home but my wife was, and she said that the gentlemen were prompt and thorough and explained what they saw and what did to correct the leak. I am not writing this as a novice to the problems in the construction industry, I am now retired but worked 40+ years in the window and door portion of the industry from owning my own company and working in sales for a billion-dollar wood window company (Marvin Windows and Doors). If anyone knows of Marvin, they are a company that prides themselves in producing one of the best wood windows in the industry as well as providing exceptional service. Well, Wonderlin is right there with them. I will continue recommend them to anyone looking for a new roof and not having a lot of issues to worry about. read more

made an appointment . but no show up even no telling not coming. poor service. speedless

I was referred to Wonderlin Roofing Systems and decided to give them a try. They handled some minor repairs for me, and I was impressed with how professional and knowledgeable they are. Unlike many roofers who just do surface-level work, they clearly understand the root of the problem and fix things the right way. Their experience really shows, and it gives you peace of mind knowing the job was done correctly. Very professional team. Highly recommend them. read more

We just had our entire roof replaced by Wonderlin Roofing, and the results exceeded expectations. From the initial quote to the final cleanup, they were responsive, organized, and clearly take pride in their work. We selected Landmark Pro shingles with the Solaris reflective upgrade for better energy efficiency, plus the 5-Star CertainTeed SureStart™ Warranty for long-term peace of mind. Their team walked us through all the options without pressure and answered every question thoroughly. The crew handled everything with care -- including dry rot repair, old dish removal, relocation of our attic fan, and even prepping the skylight curb for new glass we'll be installing soon. The jobsite was kept clean, and the finished roof looks excellent. The ridge work and venting are clean and even, the shingle lines are sharp, and everything ties in beautifully across our home, garage, and outbuildings. Wonderlin actually came in $40 cheaper than a competing bid, and they were certified to offer the 5-Star warranty, which the other company wasn't. That, combined with their strong local reputation -- and yes, even the Dennis Quaid promo -- made them the clear choice. If you want a roofing company that communicates well, delivers top-quality craftsmanship, and backs it all up with real warranty protection, Wonderlin Roofing is it. -- MM., Castro Valley homeowner read more

Wonderlin Roofing re-roofed my home and I am pleased with their work and service. During the initial discussions they thoroughly and patiently explained the pros and cons of all the options and made me feel like I was well informed. Their communication was very good and the job itself went smoothly. Overall a great experience. read more

Great customer service! Office staff very responsive. Owner Grover was very thorough and explained options and his services carefully and make sure we understood what he was saying. Very prompt in presenting us with a contract. His team was also a pleasure to work with. read more

The family owned roofing company, Grover, was polite and not high pressure. reasonable. price reasonable

Didn't end up needing their service since the water issue was not coming from the roof, but they were still great. I had a good experience throughout the scheduling and assessment process. Would come back again if I ever need help with my roof. read more

I was very impressed with Wonderlin Roofing. The crews were fast, efficient, and thorough. They did an exceptional job of cleaning up after the job was completed. The owner of the company even came out to the job site. The roof is beautiful. I would recommend Wonderlin Roofing if you are in need of a new roof! read more

I used Wonderlin for my roof repair and the company was outstanding from start to finish. When I noticed som eave rot I contacted Wonderlin and several other roofers for a diagnosis and estimate. I was able to schedule an appointment quickly and after a thorough inspection i received a fair estimate. The scope of work to be done was completely explained to me. On the appointed day the team arrived on time, I (and my dog) were introduced to all team members. The work was completed in a timely manner, in process changes were explained and discussed and agreed to, and all work areas were left in a clean state. From front office staff to workers, all of my contacts were personable and professional. Calls were returned promptly and the final invoice contained no surprises. i would not hesitate to use Wonderlin again and i recommend them to my friends. read more

We had our flat roof replaced at the end of spring and Wonderlin Roofing did a great job! The workers got the job done quickly and left the premises perfectly clean. We really appreciated their attention to detail, Cesar made sure that the flashings were water-tight and done correctly. Grover was a pleasure to work with, professional and experienced with roofing issues. His office staff was responsive and made the paperwork easy. They did the job the right way, and the city inspector approved it with flying colors. Highly recommend! read more

We've used Wonderlin several times to do repairs on our roof and gutters. They've always been prompt, courteous, careful, and affordable, and the work has been uniformly excellent. We recently called to get some information about adding extra insulation to our attic. Grover took a look at it, and was honest and kind enough to explain that it wouldn't really make as much of a difference as we had hoped it would, and that it was probably not worth doing. We really appreciated that honesty. A company that not only does good work, but tells the truth and doesn't try to get you to spend money you don't need to spend, is a company that is going to be getting our business going forward. Highly recommended. read more

Update after the 2023 "strom of the century/pine apple express + sonic boom" or whatever they are calling it these days. It has been extremely windy and rainy and I have had zero leaks or water ingress! I have recommended Woderlin roofing to all my neighbors who are having the same issue! Thanks again! read more

Wonderlin Roofing Systems - Tile prep before getting up on the roof - Roofing Near Me - Hayward, California

So great, Grover was great and seemed very honest. Took care of the the job, had a minor issue, he fixed it the next week. Better than expected. The best! ...and Wonderlin fixed a half-assed gutter repair last year. read more

Grover Wonderlin and his team did a fabulous job on our re-roof. Grover is a true professional who provided great advice and excellent communication, from our initial meeting through the final walk-through. Also, the front office team is equally responsive and very helpful. Thank you all, for your incredible work and truly the best service! read more

I didn't realize that Wonderlin was a "small" business until I saw mention of it in several posts here. I thought they were a big company because they operate like a well oiled machine! We found them via the solar company we decided to work with for our solar panel installation. Wonderlin and Synergy Solar were able to combine a single contract which made things super easy for us. While my husband did most of the research - I was able to hop on a call with Grover to go over everything and ask all my noob questions. He was helpful and explained things in just enough detail. He was honest, without any aggressive sales tactics and willingly offered his expertise. We added new insulation, and while the estimate on that was more than I had expected (isn't insulation just old cloths??) it's made a world of difference with these 100+ degree days we've been having. Our house is noticeably cooler and more comfortable. We also added some solar tube lights as well as an attic fan. The bathroom / hallway where we added the solar tube lights is amazing; husband and I have already said multiple times that these small additions on top of updating the roof has been money well spent. Everything went very smoothly and everyone was practicing covid safety. Wonderlin is a well oiled machine. Day 1: old roof was torn off. Parked in our driveway with a dumpster - the house shook because people were running around on my roof and they were gone 3 hours later with everything around the house cleaned up. No one bothered us inside - they just got to work, finished and left. Day 2: Truck with conveyer belt parked in my driveway and in about 90 minutes unloaded all the materials onto roof. Again, no one bothered us - in and out getting their job done. Day 3: New insulation blown into the house. Probably 2-3 hours tops. Laid down ground cover to protect our floors and carpet. Day 4: Full day of work and solar tubes installed (via indoors) by Ryan Day 5: Just a few hours to wrap everything up and put in mesh over our gutters and cut new downspouts. We are super happy with their service. read more

The team seems like a great team to work with... I unfortunately experienced a situation where a resealing (while a part of the scope of work) -- had to be redone because it wasn't sealed correctly. The resulting leak left a nasty crack on the ceiling finishing and there's no support there. TL:DR - they seem to mean well. But if they don't do the work entirely right and leads to water damage... they won't fix the damages. read more

We had our new roof installed within weeks! And the owner came by to explain some final details about the felt and composite types and lifetimes. The next day, the project lead came right at the time he had told us and also ensured our bathroom exhaust pipes were positioned to exit the house through the roof (instead of in the attic). The team also suggested a solar attic fan and vent for the hot summers, which we added, as well as new steel gutters on our home and detached garage. Nearly a year later, we had a solar company install panels on the new roof. That company also installed a new service panel, so Wonderlin came out to fix our gutter to ensure it wrapped around the new panel conduits. We've already recommended the team to multiple friends and family! read more

Wonderlin Roofing is by FAR the best roofing service we've ever used. Nobody wants to ever have to fix water damage in a pinch. 3 different times they came to our place quickly and fixed the issue. They are competent, friendly, efficient and great at what they do. 5 work! read more

Wonderlin Roofing Did a Fantastic Job on our roof. It required a lot of custom work and replacement of Dry Rot. I highly recommend Wonderlin Roofing. read more

Wonderlin Roof Team and Grover did a great job on our roof repair. They gave a good estimate and communicated really well throughout the process. They made a photos of the part of our roof as well, and explain all details. read more

Prompt, complete service of leaky roof. Even repaired broken tiles and some future potential leaks at no additional cost! Highly recommend Wonderlin read more

Grover and his crew did an amazing job in our roof they were neat , clean and friendly My fiance and I were very impressed of how beautiful it turn out. Grover came to inspect that everything was doing according with his extremely high standards. We highly recommended him. read more

Wonderlin Roofing Systems - roofing - Roofing Near Me - Hayward, California

it was a pleasure to work with Wonderlin roofing. From the office staff, to the team of workers and Grover. They were pleasant, respectful, did a great job and when there was a small detail that needed attention, the follow up was handled perfectly. So wonderful to work with an honest and capable company. read more

We needed an estimate for a new roof, and we had basically chosen another company, but decided to get a fourth estimate just in case. Wonderlin roofing gave us a better price and provided more information the prior companies. Would highly recommend read more

Keep in mind where this company is located when you read this. I live in Daly City. This is just a review of the personal experience I had with Wonderlin Roofing. I had a home inspection when I first bought my house. Wonderlin came out and the guy that came out just said if there was anything he thought needed attention he would let me know but he didn't find anything after a thorough inspection and he told me exactly that. Honesty and pride in a persons job is rarely experienced these days, right? Next, the rain came down hard for everyone, remember? We had a leak in our kitchen so I asked them to come to take a look. It ended up being a "gutter" issue. Simple fix. No roof issues. read more

Wonderlin did a great job on our roof! Got the estimate from Grover in a timely manner and was able to schedule the job at a convenient time. Ryan and his crew completed the dry rot repairs and the installation of the asphalt shingles in good order. We now have the best looking and protected roof in our neighborhood. Thanks for a job well done! read more

Wonderlin Roofing Systems - Roofing Near Me - Hayward, California

About 6 months ago I had a leak and the owner Grover came over and fixed something around my chimney. He wouldn't send me a bill. When this recent rain started - Ryan from Wonderlin came out - this time the leak was in my bedroom.........Not terrible but still the same a leak. Ryan went up on my roof in the rain and found another issue and fixed it a couple of weeks ago and no problem since then - even in these horrible rains in the last week, etc. I asked them to send me a bill - so far no bill has come. They original did my whole roof about 18 years ago....They were very quick. I highly recommend them. read more

If I could give them 10 starts I would. From the moment I called; I felt valued as a customer. Grover came to do the inspection on my roof and gave me a very reasonable price, which we moved forward with. Ryan and his team did the work and I have to say I am grateful I contracted them for our roof repair. THANK YOU Wonderlin Team. I will most certainly continue to refer your business to my Castro Valley neighbors and anyone looking for any Roofing needs. Thank you to the ladies behind the scenes Marianne and Melissa you guys are the best too. Small business owned is the best way to go! read more

Had my roof replaced by Wonderlin. Grover and Miguel are knowledgeable and provided very good services. I recommend talking to them to understand your options and pricing since I think they are pretty reasonable and professional. Thank you read more

Wonderlin installed my new roof probably over 8/9 yrs ago (great work and loved the color). They custom built a new fan exhaust box and painted it to match the color of my house. To this day Grover has come by to check on issues I've had that were no fault of theirs, but issues caused by other contractors doing other work and Grover has come by assessed the issue and taken care of it with no charge. I mean, C'mon!! Grover is just a honest, nice guy with great knowledge and experience. You just don't find good contractors like that anymore. I've recommended to friends who also have used them. Just a great family business. read more

I am very happy with my overall experience with Wonderlin Roofing. They were efficient and found ways to solve problems creatively and skillfully on a roofing problem that was not straightforward. Ryan has been especially impressive in his skill, professionalism, clear communication, and the level of responsibility he shows for his work. I would definitely work with them again. read more

I would highly recommend Wonderlin Roofing Systems. After the recent wind storm I called them because I noticed a roof tile was out of place. Grover came over and checked it out (in the rain) and determined it had just been dislodged by the wind. He put it back in place and refused any compensation. I'll definitely call Wonderlin Roofing for any future roofing needs. read more

We recently had our roof done by Wonderlin roofing and we had such a great experience. Friendly, professional and got the job done much quicker than we expected. The team that took our old roof off was very nice and they worked incredibly fast, and the same with the instillation. We have a great looking roof for years to come! I highly recommend! read more

Wonderlin Roofing Systems replaced my roof in Oct 2017. This was my first time reroofing a house. I had a lot of questions and all were answered by the owners and the front office. There are a lot moving parts involved in reroofing. You need good roofing contractor to make things run smoothly. I had wood rot concerns, gutter problems, and attic ventilation issues. All solved thanks to Grover and crew. Just recently (Feb 2020) heavy winds knocked off my chimney rain cap. I contacted Wonderlin Roofing Systems. Grover stopped by and recapped the chimney. Can't beat that service. read more

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After several years of flawless service in repairing occasional leaks in our tile roof, we needed to do a full replacement. Grover and his crew worked for 6 straight days providing the best service, knowledge and quality craftsmanship in a very professional and approachable way. They kept us informed of what the next steps were and followed a steady schedule to get our roof replaced in an exceptionally reasonable timeframe. We highly recommend Wonderlin Roofing. It was a very good experience and now we don't have to worry about any forthcoming atmospheric rainstorms!! read more