KCSI did an excellent job replacing my roof in December 2020. I had used them back in 2003 to side my house. Since I remembered the excellent job they did for me then and I can see how well the siding work has held up all this time, I decided to work with them again. The whole process was painless. No pressure sales, pride in their work and they keep the neatest work area I've ever seen.

Company is very professional and did an excellent job. Have a very large crew who finished my roof in one day. Owner John Knowlan was not pushy at all, is extremely nice and was willing to work with me on what I wanted done. He was very patient with me and sent me several estimates that I had asked for in advance before I decided on what worked best for me. He kept me up-to-date on when the work would be done, due to the weather. Shingles were delivered the day before and they did some wood repair around the roof the day before. The next day everyone was there early, and due to the large crew, completed the roof in one day. They cleaned up afterwards and hauled away all the debris. I would definitely use this company again - in fact they came highly recommended by another satisfied customer in Lorton.

KCSI did and excellent job. They showed up when they said they would and finished in one day as promised. The crew really knew what they were doing from start to finish. John was great to work with as I figured out what I wanted done. I highly recommend KCSI. Quality product and installation - Great Job.

We were very pleased with the final product and the entire process. Mike handled the job from the estimate to the installation. The job was completed in a week and a half. KCSI made sure all of our concerns wer resolved while the work was being done.

In all 3 jobs, KCSI went well above and beyond the work they had forecast in order to make sure the underlying problem was solved, but never charged one penny above their original estimate. Best contractor I have ever hired for any job.

They never responded to the inquiry

Replacing our windows, roof and siding was a big job, and we wanted to ensure we used a trusted reliable company. Very happy we were able to work with KCSI! Mike and his team were the nicest, reliable, and easy going team. Finished on time (sooner than expected) and on budget. No pressure selling like the others we received quotes from, no added cost or up-selling. Mike is so knowledgeable he guided me to what I needed and not what was most expensive. His team was respectful and on time every day. Price was fair and competitive (more than competitive since he didn’t try to up-sell). I’d absolutely use them again and highly recommend them.

Work completed quickly and efficiently. Able to do work as this was a small job, even though extremely busy doing other roofing projects. Able to match existing shingles with the new shingles for the repair work. Chimney flashing had to be replaced as well. Water had leaked from the chimney on to the living room ceiling. Did great job repairing the roof, etc. Would highly recommend this company.

KCSI (John Nolan) responded to my call and the siding was replaced when they said it would be. I'm pleased with the response I received and the work they did. I would hire KCSI again if a need arose.

On Friday, March 2, 2018, we were having breakfast when we saw some shingles flying off our roof due to the severe storm. While the house and roof are old, this had never happened, so we were unsure and nervous about the size of the potential ensuing damage. I immediately went online to find a roofer as I predicted that the storm would soon cut our power and internet capability off, which it did shortly afterwards. After reading up on KCSI Construction, I called and spoke with John Knowlan. The first impression is very important. He promised to come by the same day to assess the damage, which he did despite the ongoing severe storm because he wanted to assess whether a temporary tarp would be needed to prevent water leakage. He promised to put us on his schedule as soon as he could. Although the damage was not as bad as we initially thought it would be, due partly to my unfamiliarity with the roof system, John stood by his words, gave us the estimate for a repair and a replacement over the weekend, and sent his crew today, Tuesday, March 6, 2018. He told me he received some 360 calls after I called him. He could have pushed me back on his schedule to take much bigger jobs ahead if he were merely after profitability, but he did not and honored his promise. The two workers who came with him have worked with him over many years, with one working with him for close to 20 years. They did a superb job in a timely manner in repairing the damage and cleaned up perfectly. In addition, without me asking them to do this, they also nailed down some loose portion of the soffit which was within reach when they climbed the ladder, and also cleaned up some portion of the gutter which was full of debris. This was not in the original scope of work, but going this extra mile means a lot. It shows they genuinely care about their customers's house condition. If you care about integrity, honestly, and professional workmanship, it is worth trying KCSI Construction.

John Knowlan, one of the owners, provided the original estimate and managed the project the day of work. John was very knowledgeable, professional and responsive. John's guys were hard working and did an excellent job on the project. Once they were finished John walked the perimeter of my house explaining what was done to ensure I was satisfied. John also provided pictures from throughout the day as well as a self addressed stamped envelope with his final invoice. I've had a busy year with house projects and John and KCSI were by far the best contractor I have worked with in a long time. I wouldn't hesitate to recommend them for any exterior construction work.

The overall quality of KCSI's work was excellent, but particularly noteworthy was management's patient and thorough responses to me the client about the pros and cons of various types of siding and installation decisions. The result was a top-quality siding job and a very satisfied homeowner.

KCSI offered a solution that the other companies we received estimates from did not even consider. The KCSI solution resulted in less cost and less waste, Additionally, I had done my own research and knew that a certain manufacturer had an imprinted siding pattern similar to the original siding. KCSI agreed to use the manufacturer/style that I had researched. Our project was a small one compared to their other scheduled projects. KCSI was able to place our project in between their other scheduled projects.

Perfect. Mike was the kind of business person you want to meet and work with, He was sincere and forthright on all issues. Workman were neat and did a craftsmanship job. Could not be more pleased. Contacted others for bids, but Mike followed through on all counts and so the company was hired. Its hard to find someone you feel you can work with. He did not try to film-flam me like his competition did. I know enough about construction to know when i am being lied to. Mike spoke truthfully, provided a detailed work proposal and I would recommend his company without reservation or hesitation.

The work was done in a timely manner with professional service. All services and products thoroughly explained.

Work was done on schedule and the craftsmanship was top notch.

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Very prompt and professional.   I emailed on Sunday and he responded the same day.  We scheduled an appointment within 3 days (at my convenience) and he kept me updated on his arrival time.
He was professional and provided a detailed estimate on the same day.  
Unfortunately, we are on a budget and his proposal was $2,200 higher than the company that we ultimately decided to use.

I'm very happy that I went with KCSI.  The entire process went smoothly.  Mike, the co-owner of the company, was the person who came out to give an estimate and he was also on site everyday.   He was very responsive and easy to work with throughout the proposal process and the job itself.  He provided daily updates on the progress of work through email and in person.  I never felt like I didn't know what was going on or felt that I couldn't get my questions answered.  KCSI really excels in responsiveness and communication 
Mike and his crew did an outstanding job, and they went above and beyond to correct a lot of water damage (including some drywall repair) and structural issues at minimal additional cost to me.   They didn't cut any corners and the quality of their work was excellent.  My neighbors were very impressed with the quality of work as well.  The crew was very friendly and respectful, and they cleaned up the work site everyday.  
KCSI's cost was on par with other quotes that I received, but I don't think the attention to detail and the responsiveness could be matched.
I highly recommend KCSI for any siding and window jobs.

Planned start and completion dates well in advance, arrived each day on time, completed work on time. Owner supervised job each day, kept homeowners advised of progress, problems, and corrective action options. Workers were professional and skilled. Work site was cleaned thoroughly each day. Several neighbors have remarked about the wonderful job KCSI did. One wishes he had asked us for a recommendation and used KCSI for his own recent roof replacement.

Would enthusiastically recommend this contractor.

I love this company! 
They did such a good job on my siding, they were the first ones I called
when I had a roof leak.  The leak was
over a screened in porch and I was worried about the water staining the wood
ceiling so I called owner Mike MacCabe right away.  Even though his crews were all busy with
on-going projects, he broke away the same day to take a look at my roof.  Turns out the problem was with the flashing
around the chimney.  Rather than
recommending an expensive reflashing, Mike suggested recaulking and let me know
that the caulk would likely hold for about 2 years ? then I would need to
reflash.  Since my house will be due for
a new roof in a couple of years, it made more sense to hold off on the flashing
and do everything at once.  We?ve had
several hard rains since his repair and not a drop of water!  

I choose to get a window installer to look at the situation.

John and his company did a great job in updating the exterior of the house with new siding.  They went above and beyond the estimate in fixing a significant amount of water androdent damage under the old siding behind the garage and fixed an odd section of the roof that was letting water seep in.  They have a very good work ethic.  They were out in the middle of winter in between snowfalls and just worked right on through without any complaints.  At the end of the job, they fixed a crack in the fascia immediately after it was pointed out to them.  To top it all off, they came back several months later to hang the shutters after the brick portion of the house was repainted.  I would definitely recommend them as a fine company to do business with.

They did an excellent job. The work was performed efficiently and on time. They cleaned up after themselves thoroughly. Mike McKabe (who was the foreman) was terrific to work with.

Wow these guys are impressive. While they are not the cheapest guys that do this the quality of the work was great. They were neat and cleaned up every day. We have gotten lots of great comments from everyone who has seen the new siding. I would use them again.