Keystone Glass Block, LLC

Took several calls but when Gene received my query he was attentive, reviewed photos & dimensions, and helped me conclude glass block would not be the best way for me to pass a pipe from an outside oil tank to my furnance.

The men did a wonderful job. It was completed in approx 1 1/2 hours. They laid down tarps and cleaned up thoroughly when finished. The windows look great and I now have ventilation where there previously was none.

Very professional and thorough. Estimates were prepared quickly and efficiently. Communication was excellent and installation was done very well.

From our meeting with the estimator to the installation we were impressed by the professionalism of this company. The excellence of their fabrication and installation was mirrored in the respectful and courteous manner of everyone that we encountered from Keystone. They were prompt, efficient and listened to our concerns regarding the aesthetics of our older home. We would recommend Keystone without reservation and would definitely use their service again. Proper masking and safe distancing were practiced and that was appreciated. P and M Manayunk

Keystone Glass Block Company has to be the most professional contractor I've had to deal with in the past 10 years. Had to replace 2 windows, 1 in the utility room, and the other in the downstairs bathroom. Both windows were original to the house (62 years old) and were replaced with glass block. The price was reasonable and the work done was outstanding. The workers showed-up at the appointed time, were courteous, knew what they were doing, and cleaned up after the job was completed. I would definitely hire Keystone again when needed and would recommend them.

The service and results are exceptional. They replaced the block with cement from cinder block to cinderblock without disrupting our basement some of which was finished. They were the best I could have imagined. Gene the owner was on top of the entire process and the results were perfect. There is no longer a leak. It was perfect in all ways. They are the best. Hire them. In fact, our water proofing company buys glass block from Keystone.

I did not hire Gene because we had a fairly complex issue involving leaking through a louvered vent in and existing glass block window. Importantly Gene took the time to explain some potential options, including DYI, over the phone. He was prompt getting back, thorough, and creative with his suggestions.

Great! Gene was very professional. Polite. Pricing was very reasonable, also, got a discount for going through Angie's List. His employee's were on time, very competent, friendly, proficient and left the work site spotless. The windows look beautiful. I've received many compliments on the new windows. I am very satisfied with Keystone Glass.

I just bought my house and found out that the two basement windows were rotten and termite eaten. I had them replaced with glass block, they look really nice and the installers did a nice job.

They came out quickly and provided a quote for the work. Price was fair and less expensive then my other quotes so I signed the proposal and paid the deposit. In less then a week the windows were done and ready for installation. Workers were on time and professional. Completed the install quicker then they said it should take. Windows look amazing, completely satisfied and would hire again in a heartbeat.

Gene was excellent and he delivered high quality work. Communicates very effectively and very fair with pricing and scheduling.

They were very professional, did the job as stated, cleaned up after themselves. And in and out and the job was perfect. It's very comfortable, we had some very cheap windows down there and they improved the situation dramatically. I would be glad to give a referral for these folks. They were great, they were tremendous.

I called Gene on 11/3. By the 8th I was measured and paying my deposit after being thoroughly and thoughtfully informed of what to expect. I visited the manufacturing site. On the 16th the workers promptly arrived got to work and left a very neat and extra clean work space. They did an excellent job on my windows, one of which was in a 3ft high crawl space. The work was done ahead of original projection. Keystone is cash or check, no credit. But he give you a clear estimate. Expects 1/3 at signing and the rest a completion. They knocked out the old block and removed all debris. Swept clean the space they worked in, there debris and my dust. My basement is unfinished and is prone to dampness, these windows are the new highlight and inspiration to get it done!

Gene responded to my call requesting a price quote in a timely fashion. He was polite and a pleasure to communicate with. He sent over a bid and I accepted the proposal. The appointment was set up in a timely manner. The crew arrived on time and completed the work in one day. The job site was left clean and neat when I arrived home. I was very pleased with the window install. I was equally pleased with entire exerience with this company. I would definitely use them again and highly recommend them to anyone in need of glass block windows.

Arrived on time did a great job and cleaned up thoroughly

Gene was great to deal with, and the process was way faster then expected!

He was very professional, prompt, did an estimate for me since I worked nights, and called me back. They were courteous, prompt, and very clean. They even did extra work, by cleaning out the windowsill. It was the best work I've ever had done!

First, dealing with Keystone Glass Block was an absolute pleasure and so different than many of the other contractors/specialists I've used before. Gene was amazingly polite, patient and extremely informative. From the first contact with Gene (on Angie's List, btw, because of the awesome reviews) to my last very delighted call with him today, the experience has been perfect. While I am sure the job was not the most complex one, the entire process from the sale to the finished product was uncomplicated, straight-forward and best of all, pleasant. The crew was early, got to work quickly, clearly very experienced and they cleaned up beautifully. I absolutely love the work they did and I am more than satisfied...greatly exceeded my expectations. I would recommend Keystone Glass Block over any other company and I hope I will be able to use them again on a future project.

I contacted Gene to inquire about a price to replace the windows. He responded quickly and was very pleasant to deal with. He gave me an approximate quote over the phone based on what I was looking for. Once I sent him the pictures and measurements of the windows he responded quickly with an exact price of what the job would cost. I gave him the go ahead to do the work and within one week of my initial contact, the windows were installed. I certainly was not expecting such quick service but was glad for it. Gene kept in constant contact about the job. His workers showed up on time as promised and had the job done in about 2 hours. Very professional and thorough. The new windows look great and I would highly recommend Keystone Glass block to anyone.

Very accommodating! Excellent work and clean up. Window looks great both inside and out. Exterior was very, very, bad and now looks brand new!

I called Keystone Glass Block on October 8th and received a return call the very next day. Other places I called never called me back or engaged in texting after the initial contact. Eugene from Keystone told me he would come out, get measurements and send me a written estimate. I found brochures in my door the same day we first spoke and a reasonable written estimate two days later in the mail. I faxed my signed copy on Friday Oct 11th and the job was scheduled and completed as promised on Tuesday Oct 15th. This company knows the true meaning of good, no excellent customer service. They came, installed, cleaned up and left. My windows are fabulous. I would highly recommend Keystone to anyone who wants Glass Block. My father is scheduled for next week.

Gene came out on the day I called Offered tips on increasing ventilation in basement felt that 1 window instead of 2 would do the job Previous estimate was for 2 windows-ref by a friend-not Angie's list my daughter was there the day of installation but said the work was completed quickly-no broken glass I was very satisfied and would recommend this company to my family and friends

We had some really old, ineffective louvered windows in our basement that ivy and bugs were coming through. We received several estimates for glass block windows, and Keystone came in the lowest by $110. The owner was responsive and a pleasure to speak to. The windows were fabricated within days of us agreeing to the work, and they came to install the windows the very next day. The installers were on time and courteous. They did the job quickly and efficiently. The windows look absolute beautiful -- too bad they are in the basement! They also did a little custom install that allowed us to drain our dehumidifier through a PVC pipe at the side of the window, which was done much better than I had anticipated -- they obviously put some thought into a solution for us. We highly recommend Keystone Glass Block and would definitely call them again if we ever need this kind of work.

It went very smoothly, Gene the owner came to my house and measured my window. He explained what he would do. He told me he would get back to me with an estimate in 2 to 3 days which he did. The price was reasonable and I agreed to have the work done by his company. He said it would take a few days to build the window and for the widow to cure. He called me a few days later said it was finished and we set up a day for installation. Two of his employees came and installed it in about 2 hours. They did a great job, they cleaned everything up when they were done, the window looks great they did a professional job and I am very satisfied with their work and I would use them again.

Spoke with Gene who was excellent in understanding my budget status as a retiree, even willing to defer the balance for a couple of days beyond completion of the job. The two workers were prompt, professional and very neat,they were finished within 4 hrs. The windows look great and I 'm well pleased.