On Tue, 02 Aug 2005 08:44:18 -0400, Guess who
wrote:

On Tue, 02 Aug 2005 04:26:21 GMT, Lew Hodgett
wrote:

Don't be surprised if jack hammering out the existing crowned pad and
pouring a whole new, mesh reinforced pad doesn't turn out to be the
least expense way to do the job.

That was my first thought, but also because once done, the floor can
be whatever reasonable thickness is required without the variation
otherwise. I didn't suggest it since I thought the OP might object,
so offered the other alternative of a bonding material. So, I'd go
along with you that this is the best approach in the long run.

So, rent a jack-hammer and go for it. You might have to rent somebody
to use the hammer, but again you can do that and then get on with what
you really want to do, your woodworking.

Not too hard for a do-it-yourself job, provided you care to take the
time. If you get the old slab out, it'd be a whole lot less expensive
to have someone come in and pour a new one for you.

Just got done taking out a bunch of concrete that had been installed
by a freeway contractor, and that stuff was tough (8" slab with 3/4"
thick rebar every 14 inches or so- talk about overkill for a
driveway!). Took a day to remove about a garage's worth of slab- the
guys I work with said it usually takes an hour or two with a normal
driveway, but this one was an irritating exception! Used a Bosch
"Brute" hammer, and it worked like a charm- wasn't even sore the next
day. Make sure you've got a prybar and some good leather gloves to
get the concrete out, though. FWIW, I've never used a jackhammer
before Monday (always did it the hard way with a masonry chisel and a
sledge in the past), and it's about as simple as it gets.