Trained from the ground up, and installing glass block for over 22 years there is not much I haven't seen. My wife and I run a family business with no paid salespeople like the "big guys" so we always have the lowest price. We offer prompt service, return all phone calls the same day. We are honest and trustworthy & insured and have an "A" rating with Angie's List. And if you call and mention this listing on Manta we will include 2 free air vents when you purchase 4 or more glass block windows from us. Thank you Lee Giles ... Owner