We bought a house with an enormous, custom-built water tank recently installed by Alpha One but the huge roof of the tank was sagging and filling with water because it hadn't been properly maintained. We went to Alpha One to see what could be done to fix it and they sent two people out immediately to work on it. These two guys couldn't fix it using the usual techniques and they were stumped for a while. The sagging was so extensive it had broken some internal struts. I could see myself needing to buy a new roof for the tank but they had an inspration. One of the guys climbed inside the tank (so deep, by the way, his feet didn't touch the bottom and so cold he was shaking and barely able to breath after he'd been in just a very short while) and used lengths of plastic drainpipe to prop up and support the roof. The guy had to make this plunge three or four times in all to finish the job, after which the roof of the tank looked fine and it's still doing well after heavy rain. It wasn't just the promptness of the service, the ingenuity of the repair, or even the fact that it was done for free, that impressed me so much but the determination to get the job done and the personal sacrifice of the guy who got into that tank.

Approximate cost: $free