Pre Next'I have had the pleasure of knowing and working with Sentinel Maintenance for the past 10 years, primarily working as our cleaning contractor on large commercial projects. Most recently Sentinel worked on the 1.2 billion dollar South Health Campus project in Calgary, Alberta, approximately 2.5 million square feet of the floor area.'CampusProject Director'I would like to be the first to write and say that I think the washers did a fantastic job. It's amazing what one can get used to. The view is even more beautiful now than previously.'Luxury CondominiumBoard Member'I just got back from the conference, and I saw the windows in the lobby today. At first, I was going to sue you because I thought you had removed and stolen the glass. In seriousness, the windows are so clean that it looks like the glass is missing. I have never seen them look so good. Thank you - I am so glad that you reached out to me that fateful day. You are fast becoming my most favored contractor. more... See more text