Hey Guys,
Some of the nice things about the Bonehead. Recently, as now mentioned on my site, a Bonehead user went 12' under his driveway, using a 20' section of #4 rebar.
Washing under a driveway is a good way to end up with a huge crack. The concrete only gives a hard and stable surface to drive and park on. Its the base under the concrete which supplies the support. When with the Phone company, I had to make many of our sub contractors replace driveways because their liquid assisted boring machines washed just enough base soil that the driveway cracked when the home owner parked on it.
Just some words from experience. Washing under sidewalks is probably just fine, messy but fine, but I'd never do it under anything which vehicles passed over.
Take care guys,
The Original Bonehead
PS this isnt to make me money. Please read the About us page. Thanks!