Customer Testimonials

In a world of poor service, dealing with Corner Stone was a breath of fresh air.

Corner Stone is fully knowledgeable about the product, which gives us confidence in the purchase.
— Roger & Roberta E.
Altamont, NY
The bottom line is that I have always been 100% totally satisfied with your service and would not conceive of utilizing anyone else.
— Bill V.
Delmar, NY
Thanks again! We are loving the central air.
— Ed & Julie G.
We initially just wanted to even out the heating in our house ​using our current radiator system. Joe took a good look at our system and explained to us that there was a better, more efficient way, and it would save us money in the coming years. Joe was thorough, knowledgeable and efficient.
— Marc & Barbara B.
Delmar, NY
I was pleased with the very good, prompt, clean and professional work. The installation was very neat.
— William A.
Medusa, NY
Fantastic! If I knew it would be that easy, I would have tackled this project sooner. Working with Corner Stone was a very positive experience. Corner Stone arrived when they said they would and were so prepared there were no delays in the project. With our old boiler I would dry my clothes in the basement. Now there is such little wasted heat, I dry my clothes on a radiator in a spare room.
— Erin H.
Delmar, NY
Installation was excellent. Quality of work and service was excellent. Joe was great to work with. Very customer oriented and knowledgeable.
— Dave & Betty W.
Delmar, NY
Thanks so much for an outstanding job at our home! ​Your great respect of our property, tremendous professionalism and work quality are impeccable. It is nice to have a contractor listen and deliver a product that is expected to totally meet our needs. We appreciate your time and fantastic attention to detail.
— Cobleskill, NY