I agree. And since it can even be the day it is done, an estimator can't dwell on it. Yesterday you may have had super smooth sailing and last night they may have stocked the rooms with drywall in the middle of the floor you have to work around.
The drywall or other similar thing never happens:happyno:
I remember once I had a new home all ready to start pulling cable, I had holes all drilled (maybe just needed to drill an additional hole here or there when it is discovered while installing cable)and cleaned up my mess from layout and drillling to make room to lay out cables while installing. Place was fairly clean with little debris or materials laying around. Next day when I got there late after first taking care of some service calls, the windows had shown up and were installed and the guys already left, but left all their cardboard, wrapping, etc laying all over the place that I just cleaned up in preparation for pulling cables:rant: I threw all that crap outside and did not care if the wind took it away.
I know someone may comment that many places you don't install cable/conductor before the doors and windows are in or your copper may disappear overnight, I have never had that trouble thankfully, though I do pay closer attention to that possibility when working in more remote areas then I ever used to. A lot of farm work I do is just as subject if not more subject to copper thieves after installation then it is during construction though, nobody around to see the evidence as soon after it is done as there is during construction of some things.