I hope you can hear me over all the noise. I'll try and type loudly. :-)
The workers arrived this morning, plugged some stuff directly into our electric box, and went on the roof, where they began scraping away several layers from the roof:
Eventually, they sealed up the stairs:
Since then there has been a lot of noise, to say the least. The kablan had said that they do the hole in three parts, and so far, we heard what we believe was the first part crashing down. They have a "pool" sitting on a wooden platform on tires to catch the cement, and so the crash wasn't as loud as the drilling/sawing.
Please feel free to leave comments. We'll be glad to answer any questions you may have.