The team at Cornerstone responded incredibly quickly when we had an issue with the latch not working smoothly. Sean replied to my text immediately and had David call me, come by and make the necessary adjustments. Sean promised Cornerstone would provide the ultimate service when we were looking to buy the door and he delivered! So glad we purchased our La Cantina door from them. read more

David with Cornerstone Openings is the best. He came out when we had some problems with our door lock. His response time was immediate, his communication excellent and his professionalism was superior. He gave tips to prevent the door lock from sticking in the future. we have been thrilled with the service we received. read more

Cornerstone installed a big La Cantina door at our home in San Clemente over 7 years ago. It was getting stuck when we tried to open it. Sean, the owner, and David, the salesperson, got it adjusted within a day of our reaching out. These are good people who stand behind their products and are super communicators. I can't recommend them highly enough. If I could go beyond 5 stars I would. read more

Had to have our screen door serviced and they did a fantastic job! Luke was very timely with his communications and they were able to get us in quickly. Highly recommend! read more

Cornerstone Openings - Door Sales/Installation Near Me - Dana Point, California

We purchased a LaCantina folding door. We were referred to Sean at Cornerstone Openings by a neighbor. We met with one other contractor, but we knew we wanted to go with Sean and his team due to their professionalism and reputation. We worked with Sean and Dave and they answered all our questions and were true to the timeframe they committed to. Their price was very reasonable. They used Harkin Construction, and they were a great team, and very efficient. The door adds so much light and has been great when entertaining. Wished we had done it sooner. read more

Cornerstone Openings - Before - Door Sales/Installation Near Me - Dana Point, California

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Hands down the best construction company we have ever worked with. We are on our third home now in San Juan Capistrano and have used them each home to install our beautiful bifold La Cantina doors. Sean the owner Is always on it! We love all his employees and we are so thankful for this company that works so beyond hard to please their customers his employees have worked for him forever. They are a happy company doing the best out there! read more

Cornerstone Openings - Three doors! - Door Sales/Installation Near Me - Dana Point, California

We used Cornerstone Openings in connection with the order and installation of La Cantina doors about three years ago. Throughout the process, Cornerstone was transparent, easy to work with, and competitively priced. They made the installation easy since they not only sell the doors but will also install them (preventing the need to find a separate contractor for install). Fast forward years later to today, we had a minor cosmetic issue with the wear of certain door pieces. Cornerstone sprung into action, came out the same day that I contacted them about the issue, and quickly ordered and replaced the parts. This was all at no charge to us. I am incredibly impressed by Cornerstone's customer service, and I can't recommend this company enough. read more

I bought some bifold doors and sliders 3 years ago from Cornerstone. They have held up great and any little issue we have had over the years Cornerstone is super responsive and comes and adjust the doors very fast. I honestly didn't expect the service to be so great as most companies sell the product and you never hear from them again. The purchase process was very transparent and easy. I plan on purchasing two more doors from them in the next few years. read more

Cornerstone Openings - Four panel 8ft bifold, door, two panel bifold passthrough kitchen window - Door Sales/Installation Near Me - Dana Point, California

This is an update to my recent review posted on June 29. After significant effort, and several deliveries of the wrong replacement part from La Cantina Doors, Sean's team received the correct part and arrived bright and early on Monday 7/17 to repair our door's locking mechanism. While making the repair his team discovered that a minor assembly error made by La Cantina when they constructed the doors in 2017 was the cause of our long running difficulty locking our accordion doors. And the reason for the locking mechanism's eventual failure. We were assured by Sean's team that this was an extraordinarily rare quality control problem for La Cantina, who's beautiful and super high quality door system has work flawlessly for us. Thank you Sean and Cornerstone Openings for unparalleled customer service. You have earned us as customers "for life." read more

We had another positive experience with Cornerstone Openings. I contacted Sean regarding a maintenance issue with one of our La Cantina doors. Jake arrived first thing Monday morning and resolved the issue. He was friendly, conscientious and fixed it asap. read more

These guys are the best! I have older large accordion style glass doors that were not installed by this company. Two times I've needed my doors serviced, and both times Cornerstone Openings has come out and serviced them. They do a great job and are so friendly. Super amenable. If I ever need new doors, I wouldn't hesitate to hire them. Highly recommend! read more

Our La Cantina sliding door system plus screens was installed 5 years ago not only expanding our view tremendously, but causing neighbors and guests to ask where we purchased these unique and distinctive screens. I could not say enough about Sean and his team 5 years ago and again this week when we had an issue with one of our screens. Their prompt service and attention to detail in resolving my problem is not something I am used to recently with service appointments taking weeks to schedule and then weeks for parts to arrive for repairs. I highly recommend Sean and his team. read more

we love our new cantina doors. The cornerstone team was excellent. Everything was delivered on time, installation was flawless and they worked really hard to ensure our doors were installed with an additional beam for extra strength and care.. Just recently the door needed a repair and the team returned to fix it with no additional cost to us. They are the best in the biz. read more

I bought a door from cornerstone 5 years ago after 5 years I noticed the the lock was missing a screw , Jake was awesome and quick , thanks Jake for taking x Care of my issue and order the new part from the factory, I am so happy I bought d From cornerstone openings , they have a great customer service , thanks again Jake for caring and helping us. If I need more doors you guys will be my first stop read more

Excellent customer service from installation to minor adjustments that were needed. Jake came out and very quickly made an adjustment to the alignment of the door and resolved the issue we were having with the door. The door is absolutely gorgeous. Transformed the room. Luke was our original contact was also wonderful to work with. read more

Had a few issues with my 9 year old La Cantina screens and Cornerstone sent Jake out to take a look and give an estimate on repairing - showed up right on time - very easy to work with - analyzed the problems with the two screens and scheduled an appointment in the coming week to fix everything - following week - same thing - right on time - an army of helpers and within a couple of hours was sending the crew off to lunch with perfect (like brand new) screens - La Cantina product is amazing - Jake with Cornerstone is as good as it gets - don't hesitate to call them with whatever problem you have - they are THE BEST! (and this was not my first rodeo with Cornerstone - just as good the first time as this visit) read more

Nice, friendly, and hard working. They helped us out in a bind when we had damage (caused by a non related 3rd party) to our panel after it was installed and replaced with ease. read more

The Cornerstone team provided top notch services before, during and after the installation of our two La Cantina accordion doors in our home. They took extra care to ensure all was to satisfaction, went above and beyond and even took out an extra window and patched it for free, and even two years after install, came back to adjust the door. The owner and entire team have been a pleasure to work with. We'll use them again in our next home! read more

Cornerstone Openings - Door Sales/Installation Near Me - Dana Point, California

Jake with Cornerstone was responsive, knowledgeable, professional and efficient! I would highly recommend him and Cornerstone to all of my friends! read more

I purchased three large doors from Cornerstones a few years ago. They are operating just as good as the first day purchased. Highly recommended, to make it even better, years later when Support is required, they were right there to take care of it. read more

I can't say enough good things about Cornerstone Openings!! I had been trying for a year to find someone who could build our custom front door exactly how we wanted and was then referred to Will at Cornerstone who went above and beyond, out of his way to see our project to fruition. He truly is wonderful to work with, came to our house to take precise measurements for himself and made sure all along the way that things were on track. He's sooooo responsive and truly truly cares about what he does and the company he represents. Cornerstone is stellar and does excellent work!! I'll definitely be a repeat customer as once you find a company you can trust, it means everything! read more

These guys are rockstars. They installed beautiful sliding doors at my place several years back. I needed a slight adjustment and they came out several years later within 24 hours of my request, and tackled it free of charge. Highly recommend the product, highly recommend the business. Amazing service. Great value. Call them with confidence. Sean and Jake are the best. read more

A+ company to work with! Luke, the salesperson, was fantastic from the start of our project in the planning process in August 2023 to our final La Cantina slider install in March 2024. Multiple times we had to reschedule installs because of construction delays and each time Cornerstone went out of their way to accommodate. All installs were seamless with a fantastic final product. We could not be happier with our La Cantina sliders and Cornerstone Openings! read more

May quite possibly be the best money I've ever spent on my home and I couldn't have been more pleased with Sean and the whole team at Cornerstone Openings! I had been wanting bifold doors for quite some time now but felt a little overwhelmed and didn't know where to start. I had one main area in my home (about 15 feet) that I had wanted to add them to and when I asked around a bit, most co.'s made it feel SO much more complicated and I just felt more stressed about it. I remember calling Sean at Cornerstone and he happened to be in the area and stopped by the same day I called to check out my home. He walked in and within a minute said he could do it no problem, and it would be amazing - a COMPLETE difference from everyone else I had spoken to. I immediately knew they were the guys to go with. We did the measurements, he gave me the estimate, I signed off and it was as easy as that. The doors came in earlier than anticipated and Brian coordinated the install - it was all SO easy. Sean came the first day of install to go through everything so I felt comfortable and within 4 days I had my doors in. Unbelievable! His crew arrived early in the AM and on time every single day and never slacked around. I was so in love with my doors that the following Monday after they installed, I asked Sean to come back so I could order 2 more with them! Fast forward a couple months and we've now fully installed 3 La Cantina Bi-Fold doors in my home! I'm planning on adding the final 2 doors in my home in the next few months and will 100% be going with Cornerstone again to complete the work! One other thing to note - they are not pushy! Sean gives you his honest opinion on the project and doesn't try to add on things that will cost you more money. He tells you what he believes will look best and be most functional in the space. I added a screen in the bedroom per his recommendation but kept the other two without. Couldn't recommend them enough! read more

Cornerstone Openings - Door Sales/Installation Near Me - Dana Point, California

Cornerstone saved my project! When they came out to help out with installation for my contractor, they realized that the framing was not sufficient to meet LaCantina warranty or door operation. They immediately offered to go pick up the correct beam and reframe the opening to their standard to ensure my door will work for years to come, and that My family and I can rest easy with peace of mind. Their installers were professional in their interaction, knowledge, and craftsmanship. The sales staff were experts in the product, transparent, and helpful from start to finish. I will definitely be recommending them to anyone looking for top notch service in making their indoor outdoor living vision become a reality! read more

If I could give more stars I would! Sean at Cornerstone Openings went above and beyond anything necessary to help us out of a bad situation with another company. The first company we hired took our money and never ordered our door. Sean stepped in, ordered our door and helped minimize our losses with no hesitation! I wish we would have known about him to begin with, I can't say enough good things for everything he has done for us! Class act!! read more

I interviewed multiple bifold door companies and I couldn't be happier with my decision in going with these guys. Their professionalism is the best I've ever dealt with in the construction industry. Stop looking anywhere else and just call these guys. The finished product is above and beyond anything I thought possible. They showed up on time every day and provided me daily updates. They left the site clean and impeccable so that my little kids would not be in any danger. The price was fair and reasonable and I look forward to working with them again. Thank you!! read more

Cornerstone Openings - Door Sales/Installation Near Me - Dana Point, California

After searching many sliding door companies, we decided to have Cornerstone openings to replace our 4 windows and small door with 1 stacking/sliding doors. We couldn't be more happier. Sean delivered the project in a timely manner; even sooner that it was expected. His assistant Sam oversaw the crew and the scheduling. Sean is very precise, I mentioned about dust and allergies and my house was dust free during this ten days project. The contractor who later did our CA living project contacted Sean to order one for his house because he was very impressed. FYI, make sure to buy the extra screen option. It's well worth it. Thank you again for delivering our vision! read more

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Contacted Will about my bi-fold doors that needed some adjustments. He let me know they do new sales and installs but he would come by my house and check it out. He fixed up my doors and even called another guy over David to make sure they were perfect all at no charge and wouldn't except and money for doing it. Can't appreciate that effort enough class act across the board Thanks Guys read more

If there's a way to give 10 stars I would. This company is absolutely the most professional and knowledgeable team that set foot in our home. When you're spending this much money on a beautiful set of bi-fold doors, you really start to see the importance in the installation of this product. Anyone can just sell you the doors, but integrating them into your home seamlessly is what Sean and his team does best. After seeing what the entire process was to instal and the meticulous attention to detail of his team, we know beyond a doubt that we got the best value in Cornerstone openings and Harkins Construction. read more

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Sean and his team at Cornerstone are probably the single best home remodeling company that I have ever worked with. Period. Sean's attention to detail is phenomenal, and Sam (project manager) went above and beyond on multiple occasions to ensure the project turned out perfect. The construction team had the entire project turned around in a few days, and the work area was spotless after cleanup each day. Several issues came up during construction, none of which were the fault of Cornerstone, and Sean handled everything quickly and professionally, even taking care of several items out of his own pocket when it was not his responsibility. I'll say as an afterthought that pricing was extremely competitive. But honestly, you should hire this company for the incredible work they do, regardless of price. They transformed the entire look of our home. I'd recommend Cornerstone to anyone looking to upgrade their home with sliding/folding windows and doors...save yourself some time, don't even bother with a second quote. read more

Tony from Cornerstone Openings saved the day! About 5 years ago, I had a beautiful LaCantina door installed in my family room. Over time, with my 4 children, 2 dogs, and outside elements, we have put this beautiful door though it! A few weeks ago, the door finally had enough and wouldn't lock anymore! Because it's an "accordion style" door, there was no alternative way to lock it! That's where Tony comes in! Once I got in touch with him, he immediately came to check the problem! When he couldn't fix it right then and there, he was on the phone with all the right people and had the right parts and pieces ordered and the door was fixed in no time!!! Now, it works better than it has in the last 2 years!! It's just like new and I couldn't be happier (not to mention relieved that my house is locked up safe and sound!). Needless to say, I feel confident that the investment I made when I purchased these doors was a good one, because Tony and the team at Cornerstone Openings stands by their work, and does everything they can to help when time and normal wear and tear gets the best of a product they installed! Thanks so much, Tony! We are so grateful for you!! For those considering installing elaborate, beautiful doors, settle for nothing less than Cornerstone Openings to do the job! read more

All I have to say is Amazing!! The professionalism and quality started with our first meeting with Will, signing and reviewing with Sean and the team that did the work were awesome! They crushed it in a week!! Our two doors look amazing and they went over and above to make sure our house was protected during the process and cleaned up when they left. I could not be more happy with our decision to use Cornerstone. They were referred by two of my neighbors (who also installed sliders) and it was a great decision. Thank you Sean and Will!! read more

Cornerstone Openings - Door Sales/Installation Near Me - Dana Point, California

Top notch service. Having a one-stop shop for the install of La Cantina doors was really nice and is the way to go. The install was super clean and any problems were handled quickly and promptly by Sean, the owner. He manages the job right and you can tell that he takes pride in his work--which is often hard to find. They finished the job on-time without any delays, excuses, no-shows or other garbage you often get with contractors. I also liked that the crew kept the job clean and tidy. The doors are beautiful and make a big difference in the function and look of our home. I would definitely recommend Cornerstone. They know what they are doing. read more

I cannot say enough great things about Cornerstone and everyone who works there. Huge thanks to Nick who spent several hours fixing my screen after my new puppy decided to run through it! The doors and screen are awesome, truly top notch but the customer service is exceptional! read more

My Wife and I did a considerable amount of research before purchasing our La Cantina doors and contact multiple vendors before we made our final decision. The team and Cornerstone Openings was leaps and bounds better than their competition in terms of pricing, customer service and attention to detail. Our contractor ended up doing our install (hindsight we should have used Cornerstone) and we have been a few issues with the door but the team at Cornerstone has been extremely helpful in helping us fix the issues they did not cause. If your in the market for a La Cantina door look no further. The Team at Cornerstone is the real deal and will ensure you are satisfied with your product from start to finish. read more

This company replaced some windows with three La Cantina Multislide doors. The crew is professional and exceptionally skilled, they are on time, communicate very well, completely trustworthy, superb job, reasonably priced. After dealing with contractors for the last year in my home, this was a refreshing change! I am beyond pleased and highly recommend this company and their crew. Professionals with a vision, skills and expertise. read more

I have dealt with a good amount of contractors over the years and Cornerstone Openings was one of the easiest and most professional companies I have had the pleasure of doing business with. The steps of the project were explained clearly and accurately. His team showed up everyday on time and completed the project ahead of schedule. The owner stopped by the job site almost daily to make sure everything was on track which I greatly appreciated. The finish work and attention to detail were spot on. Besides the skilled crew the products he installs are the best in the business in my opinion and his overall project cost came in lower than the competition. I highly recommend this company. read more

Cornerstone Openings - Door Sales/Installation Near Me - Dana Point, California

Sean and Brian went above and beyond to complete our project to our satisfaction (design/engineering, permits, construction, and close-out). The installation is high quality and it has made such a dramatic improvement to our home. We are really enjoying the finished product. read more

Sean And Will were the best! They were always on time, hand shake kind of guys...their word is worth gold. I've worked with a lot of contractors and these guys were the best, and my fold back doors are beautiful! Would use them again in a heart beat! read more

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