About KCSI - Siding, Roofing, Windows & Doors, and Gutters
KCSI is a residential exterior construction company that specializes in the installation of siding, roofing, windows, doors, and gutters. Founded in 2000, the company prides itself on teamwork, customer service, and quality of work. One satisfied customer praised the exceptional level of communication and professional craftsmanship provided by Mike and his team during the window replacement in their 60s home. The new windows have made a significant difference in the home's appearance and energy efficiency. Mike's availability and willingness to provide counsel on other home projects have been highly appreciated by the customer, making KCSI a trusted partner in their home improvement journey. Another customer chose KCSI to replace all the windows and two sliding doors in their 40+ year old home. They were impressed by John Knowlan's patience and professionalism during the early stages of the project. Despite some minor service issues, KCSI promptly accommodated the repairs, and their estimate was the lowest of all the companies that provided the same products. Moreover, KCSI saved the customer thousands of dollars by replacing only the front door's façade instead of the entire door. The thorough quote, excellent value, professional interaction, great communications, and exceptional knowledge in the tradecraft have earned Mike high recommendations from another satisfied customer. KCSI's dedication to customer service, quality work, and competitive pricing has earned them recognition as a reliable and trustworthy residential exterior construction company.
Several years ago in 2015, KCSI did a great job replacing the siding on my single-family home, detailing all of the window trim, and replacing a sliding glass door with a patio French door. Recently, in 2025, I initiated a new home improvement project that would impact some of the siding on the rear of the house. Rather than relying on a general contractor to replace the siding, along with some other repairs, I reached back out to KCSI. Once again KCSI came through and did a quality job. They were flexible with scheduling, attentive to details, and the results look great. I clearly made the right choice years ago when I selected KCSI, and I’m happy as a repeat client.
We recently hired KCSI Construction Inc to replace the vinyl siding on the side of our home. John Knowlan was very knowledgeable and easy to work with. Excellent communication throughout the project. His crew was hardworking and professional, and it was clear that they paid attention to the details. When the old siding was removed, we knew there would be problems that needed to be addressed. John proposed new sheathing to provide a more solid foundation, and the price was reasonable.
If you are looking for a professional, detail oriented construction company that KNOWS THEIR TRADE - you should strongly consider going with KCSI Construction.
John and his Team did a wonderful Job replacing the entire Windows in our townhouse . Quality Products, Punctuality, attention to details .They provide it all. John is very helpful and kind, I highly recommend KCSI . Their entire process was perfect. Thank you KCSI .