I worked for a paving company a lot of years back. Like a lot of years back.
And we did a lot of paving of drivewalks.
I think you always want to see if they'll provide you with local references in terms of sidewalks they've done, and then see if you can go and take a look.
I mean there are so many things that happen. using barriers or how what they use to stop the growth of grass underneath (what kind of herbicide that they use.
What grade would they use of ashphalt and what the benefits are to them.
Site cleanup is huge. liability for damage to you or your neighbors property (Because it happens . . . a lot)
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My name is Ozymandias, King of Kings;
Look on my Works, ye Mighty, and despair!
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