ALL the existing gravel needs removed dug out and replaced with brand
If you dont replace the base you will be doing this all over again in
just a few years:(
this will cost more but is critical
Now one more update. The $4,700 asphalt guy said they will compact with a 5
ton roller. The $7,050 asphalt guy gave me this answer:
"After our grading crew fine grades the driveway to ensure positive
drainage, the grading crew will use a large steel drum vibratory compaction
roller to compact the existing gravel." Thoughts?
Obviously, because of cost, I'm leaning toward asphalt vs. the 10, 11 $12k
quotes I've been given for concrete. It's Wisconsin, so I don't know if
every 3 years to seal and patch it will be an accurate timetable, but if it
lasts 15 years, sealing it every 3 years, I'll be happy or, dead, or in a
nursing home by then.
'Existing aggregate' would scare me a little. Fine and dandy if your
existing substrate is deep enough and drains properly. But how do you or
they know? Around here, the top-tier companies scrape to undisturbed
soil, reserving reusable gravel, and build back. If going to undisturbed
soil is not practical (like on a lot made out of a swamp), they put the
base down in layers, and roll and tamp the living hell out of it. My
asphalt driveway has a dip that was pretty clearly a truck tire rut or
loosely filled ditch, that they just threw sand or gravel in.
If you've driven down the Interstate lately, you will probably have noticed
the green rebar. It is coated with a substance that helps keep out the
moisture. In the life span of a pour, the rebar will rot out before the
concrete does. The man is right about the use of wire and rebar in steel.
It's just that it takes so long that like you say, you'll be in a nursing
home by then. I'd study a little more about the mesh vs. rebar. A 3,100 sf
job is pretty large for either asphalt or concrete. Pick the right one.
You don't want to be standing there a few years from now, the thing going to
hell, and saying, "Gee, I wish I would have spent another couple of grand."
Study to make sure you get the right sack mix for your climate, study your
substrate and geology, then make your pick based on knowledge.
Heart surgery pending?
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