system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Why does construction start before most work hours?

I have to wake up to trucks dropping off supplies and roofers roofing every morning. I don't need to wake up until an hour later. 

Why can't construction start the same time as everyone else? 9 to 5? I understand that it would be nice to have all your supplies at the work site when you get there but why start working before people around you wake up? They also quit working or have left the job site before I get home.

EDIT: I guess I was unclear or maybe some people just didn't read the description. What I'm asking is why do households have to abide by noise restriction laws (loud parties at midnight) yet construction companies get preferential treatment and can be earth-shakingly loud at the crack of dawn?
gpt
You kind of answered your own question. The main purpose is to get home earlier. In the summer, 2 or 3 in the afternoon is the hottest part of the day. It's not fun to be out there in the heat when you're doing construction. 

Another reason is that construction isn't always a 5 - 8's job. (5 days a week, 8 hours a day) If the job needs to get done, and you need to stay late, you don't want to be leaving the jobsite at 9 at night, getting in at ten. You want to be there by dawn and use as much of the daylight as possible. If there's a night shift, you're usually doing 12 hour shifts, and switching at 6.