I don't live in Waterdown (Oaville is close by, but I usually don't use vendors in Waterdown because there are more local ones around), but a friend recommended Grainger when I expressed frustration that the screen for my sliding glass door in my bedroom kept coming off the track (It had been replaced by someone else only a few years ago, but I never felt that they did a good job sizing/fitting it, and it never really slid along the track correctly). So I called Grainger and they came to take a look within a few days. The gentleman who came was really nice and very reassuring - he assessed quickly that the current door wasn't sized correctly and would not stay on the track no matter what was done to try. So he gave me a quote on sizing, making, and installing a new screen - the quote was reasonable and I went for it. The work was done quickly and perfectly - I now have a newfound freedom to exit/enter through this door without worrying that the screen will come off the track. I would definitely use Grainger again with complete trust.