Description
Capstone Windows & Doors understands that customer satisfaction is what determines the success of their business, which is why they take a hands-on approach for every project. This locally owned family business has an experienced staff of industry experts, and the company owner provides a personal visit for every installation. Capstone Windows & Doors offers a combination of top-notch industry knowledge with extensive practical experience. A range of quality products is offered, including the trusted name brands: Infinity by Marvin windows and doors. Visit the nearby windows and doors showroom: 3837 E Wier Ave Ste 4 Phoenix, AZ 85040. Or, call the office to schedule a free in-home consultation: (480) 800-8444.
SERVICES
General door installation, Glass installation, Window installation, Air Conditioner, Aluminum Windows, Awning Window, Bay Windows, Bi-Fold Doors, Casement Windows, Curb Appeal, Custom Design, Custom Windows, Design Consultation, Double Hung Windows, Double- Hung Window, Entry Doors, Exterior Patio Door, Fiberglass Windows, French Doors, Glass Window Installation, Glass Window Replacements, Gliding Window, Home Improvements, Home Renovations, Home Windows, Home Windows Doors, Installing New Windows, Interior Door, Marvin Replacement Windows, Multi- Slide Doors, New Construction Installation, New Doors, New Windows, Patio Door, Picture Windows, Plastic Window, Repairs And Maintenance, Replacement Doors, Replacement Windows And Doors, Replacement Windows Replacement, Seal Failures, Sliding Glass Doors, Sliding Patio Doors, Sliding Windows, Specialty Windows, To Install Replacement Windows, Vinyl Frames, Vinyl Windows, Window And Door Installation, Window Cleaning, Window Coverings, Window Frames, Window Panes, Window Replacement, Window Styles, Wood Windows, Bi-Fold Patio Doors, Bi-Folding Doors, Door Installation, Door Replacement, Infinity Doors, Infinity From Marvin Replacement Doors, Infinity by Marvin Doors, Marvin Doors, Multi-Slide Doors, Patio Doors, Sliding Doors, Energy Efficient Windows, Infinity From Marvin Replacement Windows, Infinity Windows, Infinity by Marvin Windows, Marvin Windows,
Reviews
Capstone Windows did a great job replacing 30 year old windows at our two bedroom casita in Scottsdale.
The sales and ordering process was clear and concise - with great recommendations to provide for the optimum value for the replacement windows, sliding doors and treatments.
The crew members were fantastic and took a great deal of time ensuring proper plastic sheeting and protections were in place, and their cleanups at the end of the day were admirable!
The crew’s planning of removal and replacement was excellent and was done such that there was never extensive time where the home was open to the outside (it was 114 degrees out). I was impressed with the safety considerations for the workers as well. Crew lead took great care of his folks.
Capstone went above and beyond on some little items that they didn’t have to do but wanted to make sure that we were pleased with the complete effort. These items were really appreciated.
The professionalism, quality, customer interactions and communications - from Sales, Ordering, Dispatch, Installation (windows and stucco), and Follow-though were superb! Thanks All!!!
I give Capstone Windows high marks and would definitely recommend them to others!
After reading reviews and speaking with several window replacement companies we purchased Infinity windows (11 windows and 2 sliders) from Capstone and had them do the isntallation. The results are amazing! Greg (one of the owners) came to our house and answered our questions about the product and installation process. He's a very good communicator and knows what he's talking about. The window replacement crew (Chris, Ed and Kyle) were fantastic in many ways. They were on time, covered our floors and furniture, worked hard and well together, cleaned up everyday and all had terrific attitudes/personalities. Hector did a great job repairing the drywall, covered our floors and furniture, cleaned up when finished and was also very nice. We're very happy with our new windows and highly recommend Capstone Windows and Doors.
Michelle Womack
7 months ago
Capstone replaced all the windows in my home , which included a a featured a double slider that is absolutely amazing. Crews we knowledgeable and always on time, and left their work area very clean. Highly recommend Greg and his crew!!
Chuck Laughlin Jr
2 years ago
I'll make this short and quick. Did everything go smoothly? No. Did Greg and team do an awesome job and address all the unforeseen issues?Definitely Yes. Ultimately, after the project, the new windows are awesome and I am happy we chose SI (Greg and Team) and Infinity from Marvin.
SI did a fantastic job! We were first introduced to SI through a we home show in phoenix. The gal at the booth was knowledgeable and friendly. She put us in touch with Greg Johnson who did a tremendous job explaining the details and advantages of new windows all the way through the process to install the window. Every phase of our new window installation process was seamless from the sales to the installation. The installation crew was professional and extremely respectful of our home. Dave the installation manager was very professional and kept us informed on each stage of the installation process. On a side note we had 29 beautiful windows and a slider installed. It took the crew about a week, very impressed. Some of our windows are very large and up high...not easy to get to. We highly recommend SI for your beautiful new window.
Timothy Shanahan
3 years ago
Impressive. Our installers were on time, diligent and courteous. The product is truly superior and high end. We looked for replacement windows for a long time and I felt let down with the high maintenance of wood and cheapness of vinyl. Aluminum was what I thought was the most sturdy and effective but with the heat transference, that was problematic. Enter GLASS FIBER extrusion.
Opt for the Awning and or Casement upgrade which is WELL WORTH it! We used to have a slider with the center post and thought none the less of it until Greg the owner explained to us how the awning would transform the view and it did!! Could not be happier.
On the inside it is as if there was no cutting or installation done other than the new windows and outside was far less cutting onto existing stucco than I'd anticipated. Very clean and professional look.
Lastly price. Well... you get what you pay for right? BUT!! The price was less than I'd expected so my wife and I could not be more happy.
As a consumer we all try to get the most out of the dollars we invest and hope to garner more value than the price paid. Most of the time companies fall short but these guys have exceeded our expectations.
LOOK AT THAT WINDOW!!!
Exceptional! Thank you Greg!!
Recently remodeled my home and decided to go with Capstone for my new door which included door, framing, drywall, and stucco work. I mostly dealt with Greg and Audrey, both were very friendly and very communicative! They kept me updated every step of the way and followed up with me before and after each “phase” of the project to check my satisfaction with the work that was completed. They turned an old 3-panel door in to a beautiful French sliding door in less than a week from start to finish (not including the order time). Honestly the work was so good that you cannot even tell that the old door was there! I have already recommended them to a friend and when it comes time to replace my windows, I will have Capstone do the work.
When I first met Greg I jokingly asked him if he wrote his own reviews because they were so good. I will happily add an additional excellent review. Greg and his team do exceptional work. The Infinity by Marvin windows are top notch windows. The Capstone Windows team are even more top notch. I’m not a fan of letting a group strangers into my house, but the Capstone team would be invited to a barbecue! Real professional, punctual, polite, smart…all around really great team. I’d highly recommend Capstone, but I’d also highly recommend the fiber glass framed Infinity by Marvin windows.
Greg is a top notch pro. He not only knows windows but housing construction. This was evident when he offered a creative solution to the installation of a large over the sink kitchen window. We replaced 11 windows and had a new patio door installed. Greg worked hand in hand with our general contractor on the door install which was a great help.
The install crew worked efficiently and always cleaned up at the end of the day. They showed up on time and were friendly.
Thanks you Greg for a quality product and install. Looking forward to a cooler more comfortable summer!
This is now our 3rd time using SI for our window needs.
At the beginning of our project, we received quotes from several window companies in the valley and we found our representative Greg Johnson to be very professional and honest.
We realized that although they are not the least expensive company - the windows are amazing quality and visually pleasing.
And it just so happens that each time we purchased, the windows were installed within the promised time frame. What’s not to love about that!
The installers were professional, courteous and clean.
We couldn't be more thrilled with our windows or the company’s overall performance.
This current install will conclude our project but we will continue to refer SI Windows to family and friends.
An excellent experience from start to finish. We replaced all of the windows in our house. Greg gave us good information so that we could make an informed choice, and also gave us an excellent price. Work was done professionally, the house remained as clean as possible considering a large amount of drywall repair needed, and the finished product looks great. We'd happily recommend Greg and his team to friends and family.
From start to finish, we were most impressed with Greg Johnson and SI Windows! He handled the paperwork with our HOA, their installers were very professional and excellent about keeping the mess to a minimum and cleaning up. We love our new bedroom window and the very large slider in the living room! We highly recommend SI Windows and Infinity by Marvin, superior product!
Donald Johnson
2 years ago
I chose Infinity From Marvin by SI Windows Phoenix after collecting estimates from their competition. They weren’t the lowest priced but they were competitive. I had toured Marvin Windows last fall while visiting a friends cabin in Warroad Minnesota and I was very impressed.
I was even more impressed by how quickly Greg Johnson(owner of SI Windows) responded to my inquiry and how quickly he provided me with an estimate. I hired him and we set a date.
His crew showed up when he said they would and finished the install of 20 windows 2 patio doors and a double sliding patio door in 5 days. As they were finishing Alden from Legacy Stucco showed up and repaired the stucco around the windows that had been replaced. Next Hector Lopez showed up and did drywall repair on the interior of the house.
Greg has a great crew and I couldn’t be happier with the finished product. Thank You to SI Windows Phoenix and their installation crew. Thanks to Infinity from Marvin Windows as well.
Sincerely,
Bud Johnson
Greg and SI windows was fantastic. They helped me in the design choices for a complete window and door replacement. I was able to compare different ideas for placement, glass type and other features in the planning process to make an informed decision.
The crew was very professional showing up on time, being mindful of what was going on at the house and leaving their work areas thoroughly cleaned.
In total everything was done on time and installed as if it was their own homes.
I'd highly recommend SI windows because of the above reasons and the difference it makes having quality doors and windows in your home. Aesthetically ot looks amazing and i cannot wait to see the benefits of the low e glass and sound dissipating options I went with.
Heidie Stolowski
2 years ago
We had the best experience with SI windows. Greg was one of the most pleasant, professional, and respectful business owners we have dealt with. His staff was also amazing. Very thorough and meticulous with the installation process. We can't believe the difference that our new windows have made with the AZ heat! wish we would've done this project years ago.
Window quality was excellent. Installation good. We knew there would be stucco repair, which was included in the total cost, but the repair was obvious and less than satisfactory.
UPDATE - 6/7/21: Greg Johnson contacted us immediately and sent one of his supervisor employees to correct the previous stucco repairs. The final result is exactly what we had expected: top notch work and the repair is no longer visible.
Courtney Campbell
2 years ago
Adam was extremely knowledgeable not only about the products offered by SI Windows, but about everything available on the market. He shared lots of helpful information to help me make the best decision on new windows for my home, without pressuring me to buy. The installation team went above and beyond to make sure my windows looked absolutely perfect and were very courteous and respectful of my home. As promised, Adam came by on install day to ensure everything went just as planned. It is obvious that Adam and the entire team at SI Windows truly want what is best for their customers - I would recommend them to anyone!
Ashok Kanagal
2 years ago
I had a large order for Marvin Infinity windows from Adam and Greg. They were very professional, honest and transparent in their approach. The windows arrived when they said they would and the installation crew were very professional. Even after the installation, they were very responsive to address any post-installation issues. Very much enjoyed working with them and would highly recommend them.
Got 10 new windows and from start to finish it was a good experience. Both Greg & Adam Johnson stopped out at the job and seem to really care about their customers. The installers were on time & took great care on the installation. They were also very friendly and professional. Windows look great & really dress up the house. We believe that in the AZ heat Infinity fiberglass is the way to go. Definitely would recommend them.
From the start of the process, these folks are awesome.
The consultation was clear and all questions were answered clearly.
The wait time for the windows was perfect and not excessive at all.
Installation was great. The crew kept the work area clean and kept our home in mind when doing their work. protecting the inside and the flooring. The entire install crew was professional and personable.
All refuse and debris was removed as they worked AND when done with the install. Management was very easy to work with and responsive to any and all communications.
I recommend the product, the company and the people that work there very highly.
I believe we made the right choice to go with this company, SI Windows - Phoenix. We will use them again if the need arises.
Thank-you for everything!
Greg and the team were fantastic to work with. True craftsmen who finished the job ahead of schedule. I would highly recommend Greg and team to anyone looking for replacement options.
While the windows may not be the lowest initial cost, the product is designed to combat our environment well in AZ. If you need an education on the various products offered by competitors, the team from Infinity from Marvin by SI will give you the full rundown.
Check them out, you will not be disappointed!
Greg and the team at Small Improvements did a great job for us. We had 2 large 8ft x 6ft windows replaced, and wanted something that would look nice and last forever. We researched quite a few different brands and grades of windows, but ultimately decided we were most comfortable with these. We knew it would update the look of our house, but we completely underestimated the impact. We’ve had so many compliments since they’ve been in - our family is amazed.
Overall we’re very happy with our choice. The install went fine, the communication was good. When we’re ready to finish the rest of the windows in the house, we’ll probably be back.
Paul Bonestroo
3 years ago
My wife and I had an opportunity to update our home in Phoenix. We needed to make our windows more efficient and easier to clean. I wanted fiberglass, due to the heat in the summer, and window frames that did not have small drains, that when clogged with dust would drain water into the house.
We met Greg Johnson at a Home and Garden show. We talked there and set an appointment for him to come to our home. The visit was very informative, with all the examples of his products. We asked all our questions, which were answered on the spot, no hems or haws. Installation was also discussed which was to be done by his own team, not subcontractors. The price he quoted was not nearly as expensive as the other two more commonly known brands. The price was more than another brand, that I thought did not meet our expectations. Greg did not pressure us to sign that day, as others quote, The price goes up tomorrow and other nonsense.
We signed the contract. The windows were delivered ahead of schedule and installed in a timely and professional manner. Installation was a challenge, as we also have Rollershields on all the windows. No problems.
I would not hesitate to recommend Greg and Marvin Infinity windows to anyone that is looking for great windows in a home they will live in.
Eric Mollencopf
a year ago
Greg and his crew at Capstone did a fantastic job with our new windows and doors! We couldn't have made a better choice.
Great quality and service beginning to end. Doug's crew did a great job both inside and out, and the Infinity series made a huge difference for our our south facing wall.
Thanks again and hope to see you again in 2023
Update 11/4/21: Its unfortunate that this company cannot take ownership of the fact that they made a mistake by their response here. They, in fact, did accomodate me by making a Saturday appointment - but forgot about it (as I have voicemails to backup my claim)!! So glad we didn't move forward with them.
When researching different companies for full window replacement in our home, I was excited by this company’s great reviews. Made an appointment for a quote one month in advance due to my tight work schedule. Called the night before my appointment to confirm. Glad that I did because my appointment was lost, the owner planned a trip to Vegas and no one else could come out to see me. Perhaps this company has great windows, but the service didn’t appear great. Needless to say this put a bad taste in my month and we moved onto a different company that has been extremely accommodating.
I just had a project done replacing my windows around my house. To start, I have to say that I think Marvin Infinity windows are the best out there when it comes to durability/pricing (after reviewing basically every window on the market). I worked with Greg Johnson, and from start to finish...very through! First, he’s not your typical salesman as he’s more into building relationships through communication, and getting completed what’s most important to you on your project. Installation was great and Kenny made sure everything was done in timely manner, cleaned up and you could barely tell anyone had been there for a major upgrade. Nice to know if I need anything, I can always call on Greg or Kenny. I’m sure these windows will last me a lifetime, and I’ll be referring them over to family/friends. Nice work guys!!
Cheers,
John
Craig Babonis
4 years ago
My wife and I are extremely pleased with our Infinity Windows by Marvin. We contacted Greg Johnson from Small Improvements LLC, he is the managing partner. He was very informative, courteous and professional. He helped us select the fiberglass windows that my wife and I wanted for our house. We selected 5 windows and about 6 weeks later we were contacted that the windows were fabricated and ready to be installed. Kenny, the installer, did a very professional job and answered all our questions about not only the windows, but care and maintenance of the windows and warranty information. I highly recommend Infinity Windows by Marvin.
Jessica Jubara
2 years ago
We had a great experience using SI Windows to replace some of our old builder grade aluminum windows. We not only love our new windows (they are beautiful!), but the team was knowledgeable, friendly and professional throughout the entire experience. Was so nice to know we were in good hands for such a major purchase.
During our first summer in our home several of the rooms were hot boxes! After some research and going to Home shows and street fairs we met and talked to Greg Johnson from Infinity from Marvin.
After talking to him and checking ratings, we had 3 large windows and 2 extra large sliding doors installed in phase one. We absolutely love our new windows and doors! The hot box rooms are no more!!! The installation was quick and the guys knew what they were doing. We are now looking at phase 2 and plan to have 4 more windows installed. Thanks Greg!
100% recommend this company. Greg is very professional, knowledgeable and personable. He explained everything from top to bottom and answered all our questions (and we had many). He came out TWO more times to answer our additional questions. We originally only needed an estimate for one window but ended up replacing all of the windows in our home. We interviewed four other companies and we were not impressed with the professionalism we received as they really didn’t want to fuss with one window. We even talked with the other company that sells and installs Infinity from Marvin. I had to ask the sales guy to leave as he wasn’t transparent with his pricing. If you are looking for a professional, honest company this is it!
Barbara Mumma
3 years ago
When we moved into our home we knew that there were 3 windows that needed to be replaced. The seals were broken and the screens were a mess.
After meeting at the home show we had Greg from Marvin come out and look at what we wanted to replace. He gave us great advice and good education on the differences in windows. There was no pressure and he answered all of our questions! Was patient with all of our decision making as well!!
When installation came I was nervous about how this would work on a stucco house. Kenny, the installer was amazing. He was conscientious of the dust created and protected the house from it. He worked quickly and kept the work space clean. He insulated all around the windows and caulked beautifully. It was truly a very professional job.
The windows are amazing, cool to the touch when it is 112 outside I can feel the difference in my office dramatically. It makes such a huge difference and it is a great feeling knowing they are good quality windows saving my energy costs.
Our experience with Infinity from Marvin by SO Phoenix was great and I highly recommend them and their product.
We like our windows; Greg Johnson was good to work with and Kenny the installer was great as well. We had a little issue with the screens (regular screen and high transparency screen). Greg worked out the issue. There is a small difference between the regular screen and high transparency screen. I'm not sure if it's worth paying for the high transparency screen but we love our windows.
Greg Johnson of Infinity from Marvin SI is a window pro, who has a real attention to detail. Installation done within estimated timeline. Professional installation crew. The quality of Marvin Infinity replacement windows exceeded my expectations. Greg Johnson of Infinity from Marvin SI will be the only person that I will contact when I replace additional windows in my home. Don't waste your time contacting other replacement window companies like I did.
kevin eslinger
3 years ago
the whole experience was fantastic. the installers did a great job and kept the work place clean. they made sure all areas were covered during installation and cleaned up after they were done. Greg kept me informed when the crews would be arriving during the install. cant wait to get the other windows done.
We started with another company installing Marvin windows on our house. What a disaster that was! To do the remainder of the windows we hired SI Windows. What a difference a great company makes installing a great window. They even fixed installation mistakes by the other company. Thank you SI Windows and Greg!
Jerry & Linda had a very good experience with Greg and his crew. They were great to work with. We are very happy to have great windows. We highly recommend them to everyone.
We were extremely pleased with the service provided by Infinity. Greg promptly returned our call, came to our home and spent a considerable amount of time helping us identify our problem. Although he realized we were not going to make a decision any time soon, he provided solutions ranging from do-it-yourself to expensive window replacement. We decided on his do-it-yourself solution for now, but will definitely call him when we're ready to replace the window.
Found Greg Johnson to be extremely responsive. I sent an email requesting an appointment early on a Saturday morning and received a call later that morning with an appointment the same day.
Had installed half the windows in Phase 1 in the spring of 2019 and found the windows to be so much more efficient as my electric bill dropped from the previous summer - the APS average billing decreased over $20/month.
James Startup
2 years ago
What can I say, Greg and team are professional, responsive and on-time. They went above and beyond to deliver a quality product quickly and skillfully. Greg's expertise and advice truly helped to make the experience and the outcome terrific.
Just want to give a shout out to SI windows. Our Marvin windows were installed over two days. No issues. The installation crew was fantastic! Highly recommended...A++
Greg and his subcontractors did a fantastic job. They were clean, professional and just all around nice people. The door exceeds my expectations as well. Very good experience!!
We enjoyed working with Infinity. They were precise on their information and dates for installation. Their installer was prompt, courteous and enjoyable to work with. I highly recommend Infinity from Marvin.
Donna Lemmelin
3 years ago
We replaced our sliding doors and our home was transformed. They we’re very helpful in helping us make our decision and delivered on everything promised. We definitely recommend if you are looking for a beautiful and quality product!
Wow, my house is already cooler and quieter. What a professional orginazation! I guarantee if you talk to these guys, you will be impressed. Adam had amazing design ideas and the installation is stellar!
Going with Infinity by Marvin Windows was the best choice we could have made... I love my new windows and they were so polite, so clean, did not leave any mess and my windows are perfect!
This is a great company to do business with. I was very impressed with the installer. He did an excellent job and would recommend this company. They don't use subcontractors .
Robert Forbes
3 years ago
Very happy with the product and the price. Job took longer than expected. Kenny, our installer solved any problems very quickly.
Michael Nelson
2 years ago
SI Windows did a good job from start to finish. I look forward to working with them in the future.
roseann austin
3 years ago
Love my new windows and doors!! They went out of their way to help me! highly recommend!!
Mogasman Rio Verde
3 years ago
Excellent installation team.
Leopold Lemmelin
3 years ago
Jeremy Rowlett
a year ago
Monty-n-Laura Harris
2 years ago
Maria Luiza Rajao
2 years ago
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